MOLLUSCA. 
577 
(Forbes), Mazatlan ; rusticajia (Qonldi), California; (Lea), Oregon 
and California ; oregonensis (Lea), Binney & Bland, 1. c. pp. 265-270. S.pel- 
lucida (Lea) appears to = Limncous columella (Say), figured /. c. p. 271. 
Succinca (subgen. Brachyspira) sallcana (Bfr.), New Orleans, and effusa 
(Shuttl), East Florida. Binney & Bland, 1. c. p. 271. 
Limnophila. 
Auriculidas. 
Pythia samiensis, sp. n., Mousson, Journ. Conch, xvii. p. 846, Savai and 
Manua Islands, Samoa group. 
Cassidula crassiuscida, sp. n., Mousson, Journ. Conch, xvii. p. 348, pi, 16. 
fig. 1, Upolu, Samoa Islands. 
Plecotrema striata (Phil.). The living animal described ; the eyes are in- 
serted at the hinder inner basis of the tentacles. Pease, Proc. Zool. Soc. 1869, 
p. 69. 
Plecotrema hinneyi (Crosse, 1867), Crosse, Journ. Conch, xvii. p. 396, 
Sharks Bay, Australia, 
Pedipcs naticoidcs, sp. n., Stearns, Proc. Bost. Soc. Nat. Hist. Oct. 1869, 
Tampa Bay, Florida. 
Auricula nitidida (Blanf.) (Bens.), var., Blanford, Journ. As. 
Soc. Bengal, xxxviii. p. 143. 
Auricula hmneyana, hanleyanUj and gundlachi, spp. nn., Gassies, Journ. 
Conch, xvii. pp. 76, 76, Art Island, New Caledonia. 
Melampus hidentatus (Montagu) and myosotis (Drap.), Jeffreys, Brit. Con- 
chol. V. pp. 103-109, pi. 4. fig. 2, and pi. 98. figs. 1 & 2. [In Dr. Pfeiffer’s 
system neither of these species belongs to the genus Melampus^ but the first 
to Leuconia (Gray), the second to Alexia (Leach).] 
Melampus {Traliti) semiplicatus (Pease) Sindi jmrvulus (Nuttall). The living 
animals described by Pease, Proc, Zool. Soc. 1869, p. 60. 
Melampus lucidus, sp. n.. Pease, Am. Journ. Conch, v. p. 76, Oahu. 
Melampus obtusus and granum, spp. nn., Gassies, Journ. Conch, xvii. pp. 74, 
76, Art Island, New Caledonia. — M. semisulcatus, sp. n., Mousson, Journ. 
Conch, xvii. p. 347, pi. 16. fig. 2, Samoa Islands. — M. Jlexuosus (Crosse, 1867), 
Crosse, Journ. Conch, xvii. p. 394, pi. 12. fig. 4, Sharks Bay, Australia. 
Laimodonta anaensis, sp, n., Mousson, Journ. Conch, xvii. p. 63, pi. 6. fig. 1, 
Anaa Island, Paumotu group. 
Ophicardelus irregularis and 0. minor, spp. nn., Mousson, ibid. pp. 64, 66, 
pi. 6. figs, 2 & 3, Lake Tom-Tom, Wollongong [Australia?]. 
Blauneria gracilis (Pease). The living animal described, differing consi- 
derably from the type of the genus, B. pellucida. It is niaiine, or at least 
amphibious, dwelling, like Pedipcs, in the crevices of stones overflown at high 
water. Pease, Proc. Zool. Soc. 1869, p. 60. 
Otina otis (Turt.), Jeffreys, Brit. Conchol. v. p. 110, pi. 4. fig. 3, and pi. 98. 
fig. 3. 
LlMNiRIDA5. 
The anatomy and the development of the sexual organs of Limneea auri~ 
cularia are the subject of a paper by II. Eisig, Zeitschr. wiss, Zool. xix. p. 297. 
He observes that tlie male sexual organs are developed at an earlier period 
than the female. 
