^Tsar'j PROCEEDINGS OF THE NATIONAL MUSEUM. 387 



39. Coiius purpurasceiis IJrod. 

 -f- C. rctjaliiatus Sow. 



Common ; principally worn beach shelLs. 



Hood, Junics, Jndeiatigablc, aixl Cliarles islands. 



Tryon, following previous writers, assigns to regalitaius a varietal 

 }K)sition, but examples that are intermediate in coloration are exceed- 

 ingly numerous. Ilonce no doubt the following synonymy which in- 

 cludes (J. ncfjiectus A. Ad., based upon a young example; G. luzonicns 

 Sow, non Hwass., and C. comptus Gould; and perhaps C. achatinns 

 Mke., non. Chemn, as the variety reffnlitatus. From James and Hood 

 islands the examples are numerous and i)rin('ipally of the typical pttr- 

 ptirascens coloration, etc. (Nos. 10227G and 1922tl0); specimens of the 

 regalitahis var. (No. 102277) were obtained at James Island. One of 

 each from Indefatigable (Nos. 102460 and 1024(51); and one beach shell 

 of the varietal form, from Charles Island (102.'>12). Tryon gives the 

 distribution as extending from Panama to Mazatlan, Imt my paper on 

 Dr. Jones' shells carries the species as lar south as Payta in Peru, and 

 uni)ul)lished notes on a large collection made several years ago by Mr. 

 W. J. Pislier adds considerably to its northerly range in the Gulf of 

 California region, namely, at San Josef Island, Port Escondido, Los 

 Animas Bay, Angeles Bay, as well as the group of islands known as 

 Tres Marias. 



Family PLEUKOTOMID.^. 



Oenu.s MANGILIA Kisso. 

 SubgenuH CYTHARA S(aiiinia«'her. 



40. Cythara densistriata Cpr. 



Two examples (No. 12212.5). 

 Chatham Island. 



Kuligcmis DAPHNELLA Hinds. 



41. Daphnella sp. 



A single beach-worn example from Indeftitigable Island, too much 

 rubbed to admit of determination. Hinds described I), casta from the 

 west coast of America; it jnay belong to that species. 



Family OLIVID^E. 



(Jcniis OLIVELLA Swainsoii. 



42. Olivella ? gracilis Gray. 



One beach s])ecimen rMus. 122120). 

 Chatham Ishmd. 



The worn condition of this solitary example makes the foregoing de- 

 termination somewhat doubtful. 



The Olives, so common on th<- mainland and in the Gulf of Califor- 



