Proceedings of the Boston Society of Natural History, Volume 28Boston Society of Natural History., 1899 - Natural history |
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Common terms and phrases
abundant adult Amer Anastasia Island antenodals Bangs basal base Bost Boston boulders branches brown Campanularia canadensis cardinal veins cells characters Citrus County coast collection color common corallites crystals dark diabase diaphragm dike diorite feldspar female Florida floridanus front wings Gainesville Gapper Geological Georgia Gonosome gonotheca granite green ground mass growth Hagen Hill Hincks hind foot hind wings hispidus hist hornblende hydranth Hydrocaulus hydroids hydrotheca irregular Island Lake Simcoe Lake Superior Macrothemis male mammals margin models Mount Forest Museum Nepigon North Bay Oak Lodge Obelia occurs Ontario pale palustris Peninsula Harbor Peromyscus plants PLATE porphyritic posttriangular Proc pterostigma quartz region River rocks rows segment shore side skull slate society species specimens stem stolons subgriseus surface tail vertebrae texture topotypes total length trabeculae tuza Type locality typicus valleys veins vertebrae width Wolffian body
Popular passages
Page 359 - Report on the Hydroida collected during the Exploration of the Gulf Stream by LF de Pourtales, Assistant United States Coast Survey.
Page 82 - It is evident that the increase in weight depends upon two factors, first upon the amount of body substance or, in other words, of growing material present at a given time : second, upon the rapidity with which that amount increases itself.
Page 253 - North of this point in the line of glacial movement are three broad belts of rocks : First, slates and conglomerates of the Boston Basin (Carboniferous), about thirteen miles ; second, hornblendic granites, diorite and felsite, with some Cambrian slate and quartzite, eight to ten miles ; third, mica schists, muscovite granites and gneiss, pegmatite, etc., extending into New Hampshire. We found, on looking over some tons of material, that of all which was coarse enough for easy identification about...
Page 352 - Hydrothecae perfectly sessile, more or less inserted in the stem and branches; polypites wholly retractile with a single wreath of filiform tentacles round a conical proboscis; gonozooids always fixed.
Page 74 - ... bearing the ideas of increase of volume and of differentiation, then of differentiation alone, and, finally, of increase of volume alone. Returning now to the definition proposed above, we see that growth as mere increase of volume is to be distinguished from development, from differentiation, even from increase in mass, although the latter may often serve as a convenient measure of growth.
Page 359 - The hydroids of the Pacific coast of the United States south of Vancouver island, with a report upon those in the Museum at Yale College.
Page 208 - I observed several large bats flying about the city, which closely resembled iu flight a species which I had seen in northern Florida two years before, but which flew so high that I was unable to shoot them. I was very anxious to obtain a specimen, but as shooting was prohibited in the streets of the city of Key West, and as I never saw the bats elsewhere on the island, I feared...
Page 84 - ... previously formulated laws of growth. His conclusions are summarized as follows: He recognizes a general parallelism between the developmental processes occurring at the tip of a twig and in the animal embryo. In both there is first a period of rapid cell division with slow growth ; next, a grand period in which the general form of the embryo is acquired, the Anlagen of the organs are established, and the organism increases rapidly in size by imbibition of water; and, lastly, a period in which...
Page 399 - "Gneissoid series in Nova Scotia and new Brunswick, supposed to be the equivalents of the Huronian (Cambrian) and Laurentian.
Page 82 - Minot's generalization that there is a •' certain impulse given at the time of impregnation which gradually fades out, so that from the beginning of the new growth there occurs a diminution in the rate of growth.