Proceedings of the Boston Society of Natural History, Volume 19

Front Cover
Boston Society of Natural History., 1878 - Natural history
0 Reviews

What people are saying - Write a review

We haven't found any reviews in the usual places.

Other editions - View all

Common terms and phrases

Popular passages

Page 291 - ... The stipes bears outwardly the 4-jointed maxillary palpus, while inwardly is hinged a thick, fleshy lobe, broad at the base, but soon contracting and curving inward. The tip is flat and has a broad, oval outline on the inside, and is strengthened by several imbedded chitinous rods and other pieces. This lobe, by its position and shape, is doubtless homologous with the ordinary outer maxillary lobe, or galea, of the other, Orthoptera. Behind the lobe, that is between it and the tongue, lies the...
Page 48 - Our moraines form ridges and hills of almost every possible shape. It is not common to find straight ridges for a considerable distance. But the most common and most remarkable aspect assumed by these elevations, is that of a collection of tortuous ridges, and rounded and even conical hills, with correspondent depressions between them.
Page 292 - ... tendon of a muscle, but simply an elastic ligament to draw the fork back, and probably the membrane pierced by the fork aids in the same movement. The fork is still further held in place by the flexor muscles of the stipes and lobe which pass behind it and serve to bind it down against the lobe. " In the maxilla we have recognized cardo, stipes, and outer lobe, and one naturally asks if the fork is the homologue of the inner lobe of the typical maxilla, or an independent organ. At present I must...
Page 266 - Lingula have brought out many points new to science. The discovery of auditory capsules in the class of Brachiopods is one of the most important. These organs he determined in a species of Lingula and their position and general appearance recall the auditory capsules as figured by Claparede in certain tubicolous Annelids. He has also cleared up many of the obscure points in regard to the circulation, and is prepared to maintain the absence of anything like a pulsatory organ, the circulation being...
Page 266 - Morse also described some of the habits of Lingula. While partially buried in the sand, the anterior border of the pallial membranes contract in such a way as to leave three large oval openings — one in the centre, and one on each side. The bristles, which are quite long in this region of the animal, arrange themselves in such a way as to continue these openings into funnels, and entangle the mucus which escapes from the animal.
Page 264 - Outer black line very finely denticulate, shaped much as in svperatalis, but not produced so much on median nervules. It arises at about apical third, at first outwardly oblique, then running inwardly below median vein and narrowing the median space thence to internal margin. Terminally the wing is again black or blackish. A broken black line at the margin.
Page 363 - No. 1, pp. 37, with map, 1874. 25. Evolution in Ornament. Popular Science Monthly, January, 1875, 266275, with many figures. 26. Morgan Expeditions, 1870-71. — On the Devonian Trilobites and Mollusks of Erere, Province of Para, Brazil; by Ch. Fred. Hartt and Richard Rathbun. Ann. Lye. Nat. Hist., NY, xI, 110-127, May, 1875. 27. The Indian Cemetery of the Grata das Mumias, Southern Minas Geraes, Brazil. Amer. Nat., ix, 205-217 (illustrated), 1875. 28. Amazonian Tortoise Myths.
Page 335 - Alps have led me to estimate the relative agency of glaciers and sub-glacial streams in the erosion of valleys...
Page 291 - The distal portion of the fork, about one-third or less of its length, projects through the lining membrane of the mouth. At this point the fork is stoutest, and from it, it tapers to either end, the outer portion being stouter than the inner. The membrane where it is united with the fork is delicate and elastic, thus permitting the fork to be projected forward or drawn back at will. Within the head the fork is held in position by muscles inserted on its base, which unite it with the lobe and stipes...
Page 348 - ... the whole Brazilian Empire, which has an area scarcely less than that of the United States. There was only one way of accomplishing such an undertaking; it must be supported by the government. Hartt ventured to bring the matter before some of his Brazilian friends, and his ideas met with such favour that in 1874 he received an unofficial invitation from the Brazilian minister of Agriculture, to submit a proposition for the systematic geological exploration of the Empire. In August of the same...

Bibliographic information