110 Mr. W. T. Blanford on the Occurrence of 



In his revision of that paper, published in the same work 

 for November 1866, page 671, he places it as a sjnonjon or 

 subspecies of what he calls Otarta falklandica, which is my 

 Arctocejphalus nigrescens^ and not the Otaria falklandica of 

 Shaw nor the Otaria falklandica of Burmeister as Dr. Peters 

 supposes, as I have shown above. In this paper he removes 

 Otaria falklandica (that is, nigrescens) from the subgenus 

 Phocarctos, to which he referred it in his first paper, and places 

 it in his subgenus Arctophoca. 



I have not seen the skull ,• but I believe, from the figure, 

 that this alteration is a mistake. The figure of the skull of 

 his Otaria Philijjpii has no resemblance to the skull of my 

 Otaria nigrescens. It is more nearly allied to the skull of 

 Otaria Stelleri from California, agreeing with it in having a 

 vacant space with a pit in the bone between the fourth and 

 fifth upper grinders on each side, looking as if a grinder had 

 fallen out and the cavity had been filled up. 



The subgenus Arctoplioca of Dr. Peters's first essay, not as 

 modified in his second one to contain 0. fcdklandica{nigrescens), 

 chiefly differs from Gill's genus Eumetopias^ which was formed 

 on my description and figure of the skull of Otaria Stelleri (or 

 califo7'niana) ^ in the fifth upper grinder not being so far back, 

 but in a line with the back edge of the orbital process of the 

 zygomatic arch, instead of far behind it as it is in Eumetopias. 



XVIII. — On the Occurrence of Diplommatina Huttoni and 

 Ennea bicolor in the West Indies. By William T. Blan- 

 FOED, F.G.S., C.M.Z.S. 

 In the ' Annals and Magazine of Natural History ' for August 

 1867, Mr. R. J. Lechmere Guppy described the occurrence in 

 Trinidad of Diplommatina Huttoni^ Pfr., and suggested that 

 its presence and that of Ennea bicolor ^ Hutton, might be ac- 

 counted for by supposing both to have migrated across the 

 Tertiary Atlantis. I cannot help thinking that there are se- 

 veral circumstances opposed to this view ; and in order to 

 explain them it is necessary to describe the distribution of 

 Dijjlommatina Huttoni and Ennea hicolor in India. 



Diplommatina Huttoni has hitherto only been found on the 

 lower slopes of a portion of the Western Himalayas, near 

 Masiiri. It is true that the Himalayas have not been explored 

 to a sufficient extent to justify the assertion that the shell does 

 not exist elsewhere ; but, as not a single Western Himalayan 

 Diplommatina has as yet been found in those parts of the 

 Eastern Himalayas about Darjiling which have been compa- 

 ratively well explored, nor, vice nersd^ a solitary Darjiling 

 species in the Western Himalayas, it is extremely improbable 



