A Synopsis of the recent and tertiary freshwater mollusca of the Californian ProvinceS. Austen and Sons, Limited, printers, 1912 - 99 pages |
Common terms and phrases
Adams adolescence altitude Ambloxus American Province Amnicola Ancylus angulata Anodonta Anodonta cygnea Anth Anthony aperture apex appressed Binney Bulimus California carinate Clessin Coast Range Coast Shells Columbia columella Conrad Corneocyclas Cyclas cygnea dextral elevated emended form Eocene F. C. Baker Family Fluminicola fontinalis freshwater Galba genera genus Gmel Goniobasis Gould habitat apparently lacustrine habitat lakes habitat streams Haldeman Hannibal Heathilla Helisoma hinge imperforate J. G. Cooper Kettleman Klamath Lahontan Lake beds Linné Loess Loess of eastern Lymnæa Margaritana margaritifera Melania Miocene Müll Müller n.sp Nearctic Nearctic Region Nevada outer lip Palearctic Paludina periphery Physa Physa fontinalis Pilsbry Pisidium Planorbis Pleurocera Pliocene Pompholyx preocc Quaternary Rafinesque Reeve s.s. Shell Shell large Shell of moderate Shell similar Shell small sinistral sinuate solida species Sphærium spire stage stagnalis striate Sub-family Sub-genus sub-perforate sutures synonymy syntonic form Truckee Lake Tryon Type umbilicus umbones Utah vivipara whorls writer Yukon
Popular passages
Page 114 - We have endeavored to demonstrate, that a natural classification may be made by means of a system of analysis in which the individual is the unit of comparison, because its life in all its phases, morphological and physiological, healthy or pathological, embryo, larva, adolescent, adult and old, correlates with the morphological and physiological history of the group to which it belongs. 2. In the different genetic series of a type derived from one ancestral stock, there is a perpetual recurrence...
Page 141 - ... Cache Valley beds, Humboldt group, Pliocene, Cache Valley, Utah; suggests that it may be a lineal ancestor of utahensis — PILSBRY. Naut., 25 (1911) p. 9. Lymnaea auricularia HANNIBAL, Malac. Soc. London, Pr., 10 (1912) p. 140-141; includes kingii and many others in synonymy, and says in footnote: "Professor GD Louderback informs the writer that the 'Pliocene...
Page 148 - ... several species from New Zealand, Trinidad, etc., referred here, when the apical sculpture and other characters are studied will almost certainly be found to belong to distinct genera which have reached this same stage of specialization.
Page 178 - Pleurocera bitceniata; sculptured forms with vertical plications and spiral ridges and frills as in A. plicifera; aperture deeply sinuate and slightly produced below ; habitat apparently lacustrine, at least in part. Altitude (estimated), 32 mm. ; breadth, 9'5 mm.
Page 194 - Shell small, seldom over 20mm. in altitude, similar to V. subpurpureus of the Gulf States, but with a decidedly elevated spire, but slightly impressed sutures, and more slender nuclear whorls. Whorls appressed, decidedly sloping, and distinctly suh-carinate at the periphery ; habitat apparently lacustrine.
Page 183 - Shell large, averaging about 45 mm. in altitude, elevated-conical, whorls long and slightly convex, sutures impressed, periphery rounded, aperture elliptical, outer lip sinuute ; habitat apparently lacustrine, at least in part.
Page 146 - Lea, in violation of the law of priority and common-sense as well, has been treated as a sub-species [sic /] of L. apicina, a synonym according to every writer in fifty years since it...
Page 146 - Lymncea solida, Lea, in violation of the law of priority and common-sense as well, has been treated as a sub-species [sic /] of L.
Page 118 - Hyattian sense consists of a group of related individuals having a similar genetic history and possessing a tendency to evolve along strictly analogous lines.
Page 151 - Shell of moderate size, averaging 6 mm. in diameter, rounded-ovate, somewhat broader anteriorly, 'depressed-conic, finely concentrically striate, apex small, indistinct ; sub-terminal, but not inclined ; habitat sluggish streams.