Proceedings of the Boston Society of Natural History 29 (1901)
Proceedings of the Boston Society of Natural History 29 (1901)
Boston Society of Natural History
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Verrill (73), p. 652. X. littoralis var. jt>eco/iica Smith. Smith and Prime (70), p. 393. N. Abundant 6n sea walls, piles, and wherever Fucus will grow. As variable here as elsewhere. lAttorina rudis (Maton). Smith and Prime (70), p. 392. Verrill (73), p. 651. N. Digitized by VjOOQ IC 142 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. Abundant with the preceding. Relatively more abundant in less brackish water. Extremely variable here as elsewhere. RiSSOIDAE. lihsoa mimita (Totten). Smith and Pri...me (*70), p. 393. Littorinella m. Verrill (73), p. G53. N. Very common on Ulva and in black mud, upper harbor, in water almost fresh. liiasoa laevis (DeKay). Smith and Prime ('70), p. 393. Litto- riaella L Verrill (73), p. 653. ILjdrohia't I. Ven-ill ('82), p. 523. ? Rissoa stiinpsoni Smith. Smith and Prime (70), p. 393. This and the preceding and two succeeding species are in such confusion as scarcely to rei)ay any attempt to straighten out the nomenclature without further knowledge. Stimpson ('05) on the strength of the dentition and anatomy of JL ininuta retained the genus Littorinella in his subfamily Hydrobiinae (= Amni- colinae of (4ill) distinguished from Rissoinae on dentition alone, but suggested a new genus — P^crobia — which Fischer ('ST) adopts.
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