448 LT.-COL. H. H. GODWIN -AUSTEN ON THE LAND- [May 21, 



by de Eoepstorff. I have not seen it ; it is recorded in Nevill's 

 MS. copy of the ' Hand-list.' 



Genus Sitala. 



2. Sitala haeoldi, G.-A. Moll. Ind. p. 33, pi. x. figs. 7, 7 a 

 (p. 442). 



This species is no. 200 of Nevill's ' Hand-list ' (p. 41) ; his 

 Microcystis stewartiana, MS., but never described. Nevill gives 

 its locality as Little Brother Andaman and Katchal, from de 

 Roepstorft'. No. 208 in the ' Hand-list ' from Batte Malve, Nevill 

 thinks is the same species. 



3. Sitala homebati, n. sp. (p. 442). 



Locality. South Andaman {de Roi'pstovff). 



Shell dextral, pyramidal, turreted, ilat on base, imperforate ; 

 sculpture coarse transverse striatiou, with two ribs on the periphery 

 and fine spiral close ribbing on the apical whorls ; colour horn}'' 

 grey; spire conic; apex blunt and papillate; suture siiallow ; 

 whorls 4|, sides angulate, a strong raised rib on the periphery of 

 the last whorl, and another similar rib above it at the angulation 

 of the whorl, above the vertical portion ; aperture ovately quadrate, 

 very oblique ; peristome thin, slightly thickened ; columellar 

 margin vertical. 



Pig. A. 



Sitala homfrayi. X 13. 



Size : maj. diam. 1*4 ; alt. axis 1*4 mm. 



This is a form allied to Sitala suhhilirata and S. tricarinata. and 

 is of the same minute size as the latter, but it differs from it in 

 the pyramidal form and smaller narrower aperture. 



It occurred among a lot of small shells. I name it after 

 Mr. Homfray, whose name is so well known as a first worker 

 among the aboriginal inhabitants of these islands. 



Genus Discus. 



1. Discus sanis (p. 442). 



Nevill, in a MS. note, says " animal throughout of a jet-black 

 colour." 



3. Discus andamanica (p. 442). 



Nevill describes this species as follov\ s : — " The animal is quite 

 different from that of 2\ sanis, being throughout whitish with grey 

 tentacles. Shell more deeply solariformly umbilicate, bordered by 

 an acute keel ; spire more raised ; whorls more closely wound ; of 

 lighter colour." 



