48 THE NAUTILUS. 



Calliostoma iridium, West Mexico. 



Calliostoma turbiuum. Santa Barbara Is., 100 fnis. 



Auaplocamua (new genus) borealis, S. of Uiiimak Isld., 61 fms. 

 " This very remarkable shell recalls a fresh-water genus at ouce 

 and would easily be overlooked amid a quantity of Anctilosa dila- 

 tata. * * * It is probably referable to the family Triehotro- 

 pidoe." 



Solariella nuda, off Lower California, 298-455 fms. 



Solariella ceratophora, off La Paz. 



Rimula (?) expansn, Gulf of Panama. 



Emarginula flabellum. Lower California. 



Cloristes carpenter!. Gulf of Panama. 



Bentbodolium pacificum, Gulf of Panama. 



Phos cocoseusis, Gulf of Panama. 



Cominella brunneocincta, Gulf of Panama. 



Fusus (?) rufocaudatus, Gulf of Panama. 



Tractolira sparta, Gulf of Panama to Acapulco. 



This new genus seems to be a degenerate form of Volutidcs. 



Scaphella bentlialis, Gulf of Panama. 



Caucellaria centrota, Gulf of Panama. 



Cancellaria io, Gulf of Panama. 



Pleurotoma aulaca, off Acapulco. 



Pleurotomella castanea, E. from Galapagos Is. 



Fucula iphigenia, Gulf of Panama. 



Limopsis compressus, Gulf of Panama. 



Philobrya atlantica, Off Argentina. 



Callocardia stearnsii, Off Washington, near Tillamook. 



Callocardia lepta and gigas, Gulf of California. 



Callocardia ovalis, Gulf of Panama. 



Callogonia angulata, Gulf of Panama. 



Periploma stearnsii, Gulf of California. 



Periploma carpenter!, Gulf of California. 



All the species are from considerable depths ; and many of them 



being of considerable interest, figures will be very acceptable. The 



Philobrya is the first marine form in which a glochidium stage, com- 

 parable to that of the Unlonidce, has been recognized. We have in 



a former issue referred to the important light on the morphology of 



the gill supplied by the Callocardia st'-nrnsii. 



