1895.] MOLLUSCA OF THE ANDAMAN AND NICOBAR ISLANDS. 455 



Genus Alyojeus. 



2. AiiYCiEiis RBiNHABDTi, Morch (p. 445). 



The type of this species is from Great Nicobar Island and is 

 larger than the species from Camorta, named by Morch A'ar. 

 minor, only averaging 4 mm. in diameter. The latter differs also in 

 the form of the aperture, which is more circular and simple, the 

 external peristome not being expanded and inflected, particularly 

 below. 



The form from Katchall is nearly as large and like that from 

 the Great Nicobar. 



3. Altcjetjs busbyi, G.-A. (p. 445). 



This species was described in the Society's ' Proceedings ' for 

 1893, p. 595. 



Genus Omphalotkopis. 



6. Omphaloteopis (Eealia) bbbtis, n. sp. (p. 445). 



Locality. Camorta, Nicobars {de Boepstorff). 



Shell dextral, elongutely turbinate, rimate ; sculpture smooth, 

 covered with a fine epidermis, having a few indistinct lines of 

 growth ; colour pale yellowish horny ; spire conical, sides flat ; 

 apex sharp ; suture impressed ; whorls 6, the last slightly carinate 

 with a hair-like keel, which is seen in the whorl above ; below a hair- 

 like keel round the umbilical region ; aperture ovate ; peristome 

 thin, not complete in specimen. 



Size : maj. diam. 1-8 ; alt. axis 2'8 mm. 



Animal. One specimen was in a tube with a label by Nevill : 

 " beats me, please send others." Camorta. In sorting out tubes 

 full of mixed species I found two others inside two examples of 

 Microcystina. 



It is so much smaller than any species of this genus from these 

 islands, although not quite adult, that I have no hesitation in 

 naming it. 



Genus Pupina. 



1. Pupina nicobarica (p. 445). 



Under this name Nevill gives two varieties in his MS. 

 Catalogue : var. nana, long. 4-6, alt. 2-5 mm.. Great Nicobar, and 

 var. evertata, from de Eoepstorff, from the same island. 



As I have pointed out in the ' Land and Freshwater Mollusca 

 of India,' p. 45 (1882), the genus SarjclineoM of Morch will not 

 stand ; his S. clidrichsenii turns out to be an operculated form. 

 There are some 20 specimens in Mr. de Eoepstorff's collection, in 

 seven of which I detected the operculum. This is multispiral, of 

 about 4 whorls, and very thin ; further examination showed that the 

 shells were young Pupince ; the operculum also corresponded. In 

 some shells of Pupina nicobarica and in the white variety albina 



