112 MR JAMES COSMO MEhVILL AND MR ROBERT STANDEN ON THE 



Hob. Shore, Port William, Falkland Islands, January 31, 1904. 

 Indistinguishable from the European species. 



Section Siphonarioidea. 

 Family Siphonariidte. 



Siphonaria redimiculum, Reeve. 



Siphonaria redimiculum, Reeve, Conch. Icon., ix., pi. v., fig. 21 (1856). 



,, E. A. Smith, "Moll, of Kerguelen," in Trans. Royal Soc. 



Land., 1879, p. 16. 



Hob. Hearnden Water, Falkland Islands, shore, January 7, 1903; also trawl, 

 Port William, Falkland Islands, January 31, 1903 ; Gough Island, on the shore, 

 April 22, 1904. 



Order PULMONATA. 

 Sub-order BASOMMATOPHORA. 



Family Auriculidse. 

 Marinula nigra, Philippi. 

 Hab. Gough Island, on the shore, April 22, 1904. 



Class SCAPHOPODA. 



Dentalium eupatrides* sp. n. (Plate, fig. 12). 



D. testa magna, nitidissima, tenui, alba, paullum arcuata, polita, lineis incrementalibus concentrice 

 praedita, versus apicem solum longitudinaliter obscur<$ multi-striata. Apice minirao, apertura rotunda. 

 Long. 63, diametr. antic. 5, diametr. post. 1 mm. 



A fine, glistening white species, of thin and fragile substance. The concentric incre- 

 mental lines of growth are frequent, and occasionally shown more plainly by staining 

 of straw-colour. Towards the apex the surface is longitudinally closely striate, these 

 striae extending for almost one-third of the total length. Some examples are straighter 

 than others ; the majority are slightly gracefully arched. The aperture is circular, 

 varying in diameter from 5 millimetres in the type, to 7 in one very broad specimen. 

 From the figure and description t by Dr W. H. DALL, his D. callipcplum seems akin 

 to our species. This was obtained in several stations in the West Indies during the 

 Blake Expedition, at between 100 and 200 fathoms. 



* (virarpiSiis, patrician. 



t Bull. Mus. Gomp. Zool. Harvard, vol. xviii., p. 419, pi. xxvii., fig. 126 (1889). 



(ROT. soc. EDIN. TRANS., VOL. XLVI., 142.) 



