BY JAMES C. COX, M.D., F.L.S., ETC. 621 



336-337, 1876, also iu Novitates Concholologicae, Vol. iii., 356, 

 1867-69, pi. lxxxiii., fig. 5, 6. 



Habitat. Santa Catalina Island, one of the Solomon Group, a 

 comparatively small Island to the south of San Christoval. 



It will be found on reference, that Pfeiffer placed this species 

 (which is imperforate) iu the Brit. Mus. Catalogue in his third 

 group which have the umbilicus openly perforated or umbilicated; 

 this mistake is rectified by him in his Monograph of 1876. 



I have a large number of specimens of this pie-bald species 

 from Santa Catalina some of which are absolutely imperforate, 

 while others are openly umbilicated some have a light coloured 

 peristome, others are blackish with every intermediate shade, the 

 upper half varies from olive-brown to blackish- chestnut ; all 

 have " distinct arcuate " or " deep arched striae " near the suture 

 besides many other diagnostic characters resembling verreauxi in 

 one specimen and castanea in another, so much so, that I have no 

 hesitation in stating that I believe the two last named species are 

 one and the same, possibly having slight local variations, but 

 nothing to justify their being made distinct species. The only 

 doubt in my mind is whether they are not both only one of the 

 many varieties of Pythia scarabceus. 



52** Pvthia Wallacei, Pfeiffer. 



Pi/thia Wallacei, Pfr., in Pro. Zool. Society of London, 1861. 

 p- 28, pi. 2, fig. 2, also in Monographic Auriculaceorum, p. 338, 

 1876. 



Habitat. Island of Batchian, Pfeiffer, on the authority of 

 Wallace. 



