MOLLUSCA. 
255 
Tryon, G. W. Review of the Goniobases of Oregon and Cali- 
fornia. Am. Journ. Conch, i. pp. 236-246, with a plate. 
Eleven species of Californian MelanidcB are at present known, 
all belonging to the genus Goniobasis, and all being either from 
the Columbia river, Oregon, or the Sacramento and Klamath 
rivers and their tributaries. Southern California has, as yet, 
yielded no species, the species of Mexico proper belonging to 
the tropical division Pachychilus. Most bear a close analogy 
to some of the Pacific and Indian forms — thus, for example, G. 
rudens (Reeve) to Melania honinensis (Lee) and the Tahitian M, 
unicolor (Tryon). There is, moreover, a certain similarity of 
form, ornamentation, and texture pervading the whole group, 
which widely separates them from the eastern American species. 
New species : — 
Trypanosioma suhrohustum, roanense,\lesteyi, cylmdraceum, and car«- 
natuirij Lea, Proc. Acad. Nat. Sc. Philad. 1864, p. 16, Tennessee j T„ ve- 
nustujUy cinctum, univittatum^ corneum, and napoideum^ Lea, ibid. p. 112, 
Alabama and Tennessee. 
Pleurocera conradi, Tryon, Am. Journ. Conch, i. p. 38, pi. 1. fig. 
nia pyrenclla of many collections/' Tennessee and Alabama. The name 
Pleurocera^ Rafinesque, is recommended by Tryon instead of Trypanosioma 
(Lea). Am. Journ. Conch, i. pp. 82 & 83. 
Strephohasis lyonsii, Lea, Proc. Ac. Nat. Sc. Philad. 1864, p. 7, Holston 
River, Tennessee. 
Goniohasis emerye7isis, umhonata, aThanyensis, and viridostriata^ Lea, 1. c. 
pp. 3, 5, & 6, Tennessee and Georgia. The same author changes several 
names given by him, but preoccupied, viz. G. hlanda into G. versa, vamtx-^ 
emii into prestoniana, and etoWaJiensis into canhyi, — Goniohasis suhrhomhica, 
fraierna,rom€e, quadricincta, smithsoniana, pulla,pupceformis, Lea, 1. c. pp. Ill 
& 112, United States. 
Goniohasis translucens, Anthony, Am. Journ. Conch, i. p. 36, pi. 1. figs. 1 
& 2, Canada; G. interliheata, idem, ibid. fig. 3, Indiana; G. gramined, 
Haldeman, ibid. p. 37, pi. 1. fig. 4; G. catuhcea, Haldeman, ibid. figs. 6-7, 
Catawba River, North Carolina; G. haldemani, Tryon, ibid. p. 38, pi. 1. 
fig. S — Melania acuta (Lea)=ilf. exilis of many collections. Lake Erie and 
Lake Champlain. 
ScJnzostoma showalterii, Lea, Proc. Acad. Nat. Sc. Philad. 1864, p. 112, 
Alabama. Tryon, Am. Journ. Conch, i. p. 76, proposes to alter this name 
into shoioalteriana, as Lea used it formerly for another shell. 
Mesescliiza, g. n.. Lea, with a Pleurotoma-\\kQ slit in the outer lip on the 
periphery; M. grosvenorii^ Lea, Proc. Acad. Nat. Sc. Philad. 1864, p. 2, 
Wabash River. Tryon, Am. Journ. Conch, i. p. 74, thinks the specimens to 
be immature. 
Leptoxis (Rafinesque). The restoration of this name instead of Anctdosa 
or Anculoius is rejected by Tryon, Am. Journ. Conch, i. pp. 82 & 111, and 
defended by Haldeman, ibid. p. 298. 
