MOLLUSCA. 
253 
Neiv species : — 
Melanopsis ammonis^ Tristram, Proc. Zool. Soc. 1865, p. 542, Heshboii and 
Ammon, east of the Jordan, allied to M. pra;rosa, L. j M. eremita, Tria- 
tram, ibid., Wady Um Bagkek, near the south-west corner of the Dead Sea, 
very glossy. — M. do7'icc, Issel, Mem. Accad. Torin. xxiii. p. 16, pi. 1. figs. 7 & 8, 
from the hot springs of Kerman, Southern Persia. 
Melania 7'iibropmictata, Tristram, 1. c. p. 541, fountains near the Dead Sea, 
allied to tuhcrculata (Miill.). — 31. 7'etifera, Tryon, Am. Journ. Conch, i. p. 216, 
pi. 22. fig. 4, Ilakodadi, Japan. — M. nodicincta and victoriee, Dohrn, Proc. 
Zool. Soc. 1865, p. 234, the first from lake Nyassa, the second from the Zam- 
besi river. — M. glohosa, Anthony, Am. Journ. Conch, i. p. 207, pi. 18. f. 3, 
Pegu, group of 31. hej'culea (Govld). — M. hrimnescens, Tryon, /. c. p. 216, 
pi. 22. f. 1, Philippines, near 31. decollata (Lam.). — M. circumsidcata, (lassies, 
Journ. Conch, xiii. p. 212, New Caledonia. — 31. clavidus, Mousson, Journ. 
Conch, xiii. p. 202, Fejee Islands ; M. unicolor ^ Tryon, 1. c. p. 217, pi. 22. 
f. 2, Tahiti. — M. landauerij Brot, Mai. Blatt. xii. p. 176, near Jf. recta (Lea), 
locality unknown. 
b. American 3Ielanidce (^Strepomatidee), 
Stimpson, W. On the structural characters of the so-called 
Melanians of North America. Am. Journ. Sc. xxxviii. 
1864, July, pp. 41-53. 
Melania virginica (Say) and M. dissimilis (Say) have been 
examined, intromittent male organ none. The female speci- 
mens have a conspicuous slit or sinus in the right side of the 
foot, about midAvay between the tentacle and the operculigerous 
lobe. The author proposes to separate the Melanians, ^^the 
American species at least,^^ from the ordinary Ctenobranchiate 
Gastropods, and to unite them with the Vermeti into a distinct 
tribe, Anandria. Records of former descriptions of the soft 
parts of American Melanians are added. 
Tryon, G. W. Observations on the family Btrepomatidai. I. 
Classification. Am. Journ. Conch, i. pp. 97-124, with a 
plate. 
This paper is said to be the result of the author^s investiga- 
tions whilst engaged in the preparation of a monograph of this 
family, which will be published by the Smithsonian Institution. 
The author adopts ten generic names, divided into three sec- 
tions : — 
1. Trypanostomoid section ; aperture produced into a more or less obvious 
canal : JTo, Tlern'oce^'a^ Angitrenm, Lithasia^ and Sti'cphohasis. 
2. Goniobasic section ; aperture merely angulated in front, columella not 
twisted : Eurycoelon^ Goniohasis, Schizosto?na, and Meseschiza ; the last with 
a slit in the middle, the preceding genera with a similar one in the upper part 
of the aperture. 
3. Aperture entire and rounded in front : Anculosa (Say). 
