MoUusca in the Collection of the Zoological Society. 379 



The body whorl has a dark chesnut band next to the suture and a 

 lighter divided one below the row of tubercles; two other faint and almost 

 obsolete bands are seen between the divided band and the base in the 

 young shell. 



Dredged at Sea to the northward of Isabella Island, at the entrance of 

 the Gulf of California. In Mr. Sowerby's collection . 



CONUS ARCUATUS. 



C. testa fasiformi, alhidd, castaneo-marmoratd, striis et labio spiram 

 versus marginato arcuatis; spird mediocri, carinatd; epidermide 

 tenni; long. 2, lat. Yo,poIL 



Habitat in Oceano Pacifico. 



This Cone, of which we have seen but one other specimen, is remark- 

 able for its curved striae and lip, which last is deeply notched at the 

 termination next to the spire, so as almost to resemble the ala of some of 

 the strombi. There are a few not very deep striae at the base of the shell. 

 Found in the Pacific Ocean, near Mazatlan. 



CoNUS INTERRUPTUS. 



C. testd subgracili, albidd, spadiceo-nubild, tceniis frequentibus spadi- 

 ceis albo interruptis cinctd, ad basin striatd; spird mediocri, sim- 

 plici; labio recto, cremdato; epidermide tenui; long. l^\j, lat. ^q, 

 poll. 



Habitat in Oceano Pacifico. 



The younger shells of this pretty Cone are not so slender as those of 

 larger growth. Dredged in the Pacific, near Mazatlan. 



*Oliva gracilis. 



O. testd fusiformi, obsolete longitudinaliter striata, albd, castaneo-mar- 

 moratd; long. I, lat. -f^, poll. 



This beautiful and interesting shell in general appearance comes so 

 near to a Terebellum, that a casual observer might, at first sight, mistake 

 it for a species of that genus. In Mr. Bland's Collection. 



/'To be continued. J 



