f! 



f-r>a 



REPORT 13G3, 



*Tape5 staniinea. 



Chania frondosa. 



Cardiura procerum. 



Liocardiuin elatum. 



Modiola capax. 



Modiola Brasilieusis. 



Lithophagus attenuatus. 



Barbatia gradata. 



Pecten veutricosui?. 



Ostrea Virginica (Maz. Cat.}. 

 •Ostrea lurida, var. 



Ustrea conchapliila. 



Ostrea amara. 



tSiphonaria sequilirata ( = leviuscula, 

 aS'^^., teste Cuming). 



Siphonaria gigas. 

 •Helix areolata, Fbs. (The only land- 

 shell received from the Bay.} 



Dentaliuni tetragonuni, Shy. 



Dentaliiiin seraipolituni. 



Dentalium lacteum, 1 hil. 



Acmaea strigatella. 



Acnifea atrata. 



Gadinia reticulata. 



Calliostonia versicolor. 

 *Chlorostoma galliua. 

 •Chlorostonia aureotinctum. 



Nerita scabricosta. 



Nerita Bernhardi. 



Crucibulum spinosum. 



Crucibulum inibricatum. 



In the above list, the only strictly 

 with a *. 



The following species have been received from La Paz, besides those tabu- 

 lated in Major llich's list, p. 541, in the C. S. L. list, p. 619, and the B. A. 

 Kep, p. 352. It is clear that the fauna of the district is essentially tropical, 

 and remarkably free from Californian species. 



Dentalium semipolihmi. 



Turritella punctata. 



Modulus cerodes. 



Olivella fulgida, Lieut. Trowbridge [teste W, Cooper ; but probably added by 



him accidentally from his W. African collections. It has not been received 



from any other West-coast soui'ce]. 

 Siphonalia modificata. Bead. 



A very interesting series of shells were collected at Guaymas and Pinacati 

 Bay, by Capt. Stone and Mr. Sloat. The latter gentleman affixed MS. names 

 to those which he regarded as new. They were in remarkably beautiful 

 condition, the bivalves having an unusually porcellanous aspect, and many 

 ui the species presenting local peculiarities. 



Mulinia carimdata, Desh.,= Mrtc<?-a modesta, Sloat MS. 



JJosinia ponderosa. Very large. 



Cldone fluctifi-ai/a, Sby.,= V. Cortezi, Sloat MS. \_=gibhosiila (Desh.), Ilve.,= 



callosa, Sby., non Conr.]. 

 Chione succincta, Val.,= Calif orniensis, Brod.,= V. crassa, Sloat MS. [Very 



variable in sculpture ; also, with the last, varies greatly in shape; some o.t the 



specimens being much produced, others rounded.] 

 Chiuiie (jnidia, Brod. Passing into amathusia. 



152 



Crepidula onyx, 



Crepidula excavata. 



Galerus conicus. 



Cerithium stercas mnscaruiU, 



Pyrazus incisus and var. 



Rhiuoclavis gemmata. 



Cerithidea Mazatlauica, 



Litorina fasciata. 



Litorina aspera, var. 



Conus " reticidatus " (Pease). Dead. 



Couus " emarginatus " (Pease). Bead. 



Conus interruptus. 



Neverita Reciuziana. 



Polinices bifasciata. 



Cancellaria urceolata. 



Caucellaria goniostoma. 



" Cypnecassis testiculus " [perhaps 



tenuis]. 

 Malea ringeus. 

 Priene nodosa. 

 Oliva subangulata. 

 Oliva porphyria. 

 Purpura patula. 

 Purpura biserialis. 



*Purpura ostrina. [Xormal, living.] 

 Vitularia salebrosa. 

 Monoceros lugubre, var. 

 Cerostonia monoceros. 

 Nassa tegula. 

 Siphonalia anomala. 

 I'hyllouotus nigritus. 



Californian species are those marked 



