60. 
68. 
AT. 
80. 
87. 
105. 
116. 
aL, 
15. 
20. 
al. 
22, 
23. 
ON MOLLUSCA OF THE WEST COAST OF NORTH AMERICA. 571 
lives there. The shell here figured is beaked like Nettaili, no. 49; lu- 
nule very faint; concentric ridges very faint, but sharp; radiating ribs 
very coarse. Inside deeply stained; margin not crenated on the sharp 
anterior edge, though faintly on the lunule; hinge-teeth stumpy. | 
Venus muscaria, Rve. Hab.?— [Has the aspect of a West Coast species, 
between cardioides and fine var. of staminea; sinus large; teeth strong, 
not bifid ; lunule with radiating ribs. | 
Venus undatella, Shy. Gulf Calif. [Nota satisfactory species, the type 
having the aspect of a poor specimen altered for cabinet. The “sculpture 
much changing in its development towards the margin” is an accident 
often seen in the cancellated species. Similar specimens of V. neglecta, 
no. 54, collected at Cape St. Lucas by Mr. Xantus, agree with wndatella 
in all respects, except that this is violet within, neglecta being white. 
Ligament-area (as in neglecta) smooth in one valve only. | 
Venus Adamsii,Rve. Japan. [Closely related to Tapes lacimata, San Diego, 
in size, aspect, hinge, &c. Differs in mdntle-bend being not so long or 
ointed, and the radiating sculpture much finer := V. rigida, Gld., MS., in 
timpson’s list; non Gld. in ‘ Otia.’] 
Venus ornatissima, Brod. Panama, sandy mud, 10 fms., Cuming. Still unique. 
[Like V. gnidia, jun., but radiating ribs coarser and more distant; con- 
centric frills not palmated ; lunule pale, laminated. | 
Venus callosa {Sby., non} Conr. Sandwich Is. and Calif. { Vide note to no. 
59. Thisis the V. Nettallit of the Brit. Assoc. Report. Those who regard 
it as distinct from fluctifraga, of which gibbosula, no. 47, is the extreme 
form, may retain the name caillosa of Sby., but not of Conr. Conrad’s 
species= C. nobilis, Rve.; differing from the true Calliste, as Mercenaria - 
does from Venus, in having the ligament-plate rugose.] = V. fluctifraga, 
Sby., teste Rve. in errata. 
Venus bilineata, Rye. Gulf Calif. Partakes of the characters of compta 
and subimbricata: all three may indeed be different states of one and the 
same species. [The shell figured at 105d has all the peculiar features of 
compta, which are clearly marked within; only the concentric waves are 
closer than usual. The shell figured at 105a fd gacnd to be the true w- 
datella, only in fine condition, the type being rubbed. It has exactly the 
same internal characters, including colour; only the colour-lines outside 
are arranged in rays instead of \s. Mr. Reeve, however, retains his differ- 
ent aeagN 
Venus Cypria, Sby., P. Z. 8.1852. Is. Plata, West Columbia. [From same 
district, teste Schott in Mus. Smiths.] Has all the appearance of being 
an attenuately produced form of the West Indian V. paphia [which is 
also from Cape Verd Is., teste Macgillivray in Brit. Mus. ]. 
Dione * maculata, List. West Indies ; ‘Brazil: Pacific Ocean. Widely distri- 
buted in both hemispheres. [No authority for the Old World; the Pacific 
shells are Callista chionea, var. | 
Dione nobilis, Rve., 1849. Cal. [=C. callosa, Conr., 1837. The original 
name, from type, had been communicated to Mr. R., but is not quoted. | 
Dione semilamellosa +, Gaud.,= C. lupanaria, Less. Centr. Am. [=lupinaria, 
Maz. Cat., no. 95. Vide Deless. Rec. Coq. pl. 19. f. 2: “ China Seas,” no 
authority. | 
Dione brevispinata, Rve.,=brevispina, Sby. [Gulf of] California. [Scarcely 
iffers from C. rosea, jun. | 
Dione multispinosa, Shy. Peru. Concentric ridges thinly laminated; spines 
slender and numerous. [An extreme form of the Pacific C. Dione (teste 
Hanl.) ; distinct from semzlamellosa. | 
Dione Veneris, D’Arg. Conch. pl. 21. f. 1,=V. Dione, Ln. West Ind. and 
* The figured types of this genus had been accidentally mislaid ; and might alter the 
judgments given in the text. 
+ “for obvious reasons, I think it best to abandon the foul name given to this lovely 
Species by Lesson,” Rve. (Vide Maz. Cat. p. 70, note.) ? Would not the same reasons 
lead to the alteration of meretria, impudica, &e j 
