366 HELICINID^. 



Original description : — " T. parviila, conoidea, solida, laevigata, 

 nitida, pallide straniinea ; spira breviter conoidea, vertice ob- 

 tusiusculo ; sutura levis ; anfr. 4 vix convexiiisculi, ultimus latua, 

 siibdepresso-rotundatus, subtus pariiin convexus, medio callo 

 concolore parum expanso muuitus; columella brevissima, triangu- 

 laris ; apertura obliqua, late semiovalis ; perist. simplex, rectum, 

 margine basali cum columella angulum obtusum formante. 



" Diam. maj. 41, min, 4, alt. 3 mm." (Pfeiffer.) 



Hah. Nicobar Is. {Novm'ci Expedition'). 



The species is compared by the author with Hdicina pisum, Phil., 

 which it resembles, but from which it may be distinguished by the 

 rounded last whorl, thin peristome, etc. From II. nicoharica it is 

 said to differ in the higher spire, absence of keel, and the simple 

 straight peristome. 



Var. amphibola, Wagner. 



Sulfwinu zelebori amphibola, Wagner, Denks. Kaiserl. Akad. Wiss. 

 Wien, Ixxvii, 1905, p. 380, pi. 3, fig. 4 ; id., Concli.-Cab., 

 Ilelieiuidae, 1907, p. 32, pi. 5, fig. 4. 



Original description (in German) : — " Shell conoid, yellowish- 

 corneous or brownish-yellow, frequently with dark apex and two 

 translucent dark bauds on a milky-white clouded ground ; the last 

 whorl is more rounded and descends more in frout ; the peristome 

 is more dilated and retlexed. Operculum typical. 



"Diaui. 5, lieight 3'8 mm." ( Wagner.) 



Hah. Andaman Is. 



Tlie author states on several occasions he received this forui 

 labelled '■'■ Helichia scrvpichoin, Benson." 



Subgenus APHANOCONIA, Wagner. 



Aplianoconia (ffenus), "Wagner, Denks. Kaiserl. Akad. Wiss. Wien, 

 Ixxvii, 1905,''p. 388 ; id., Concli.-Cab., Helicinidae, 1910, p. 158 ; 

 Bourne, Proc. Zool. Soc. 1911, p. 702. 



Type, Helicina verecunda, Gould (1st species). 



Range. Burma, Andaman and Nicobar Is., Seychelles, Malaysia, 

 Philippines, New Guinea, S. China, Japan, Micronesia, Melanesia. 



Shell small, conoid ; peristome somewhat thickened, not refiexed 

 or slightly so ; operculum triangular-rotundate with acute upper 

 angle ; sigmoid margin rather depressed and only slightly 

 S shaped. 



565. Helicina andamanica, Benson. 



Heliciiui andamanica, Benson, A. M. N. H. ser. 3, vi, 1860, p. 194 ; 

 Pfeiffer, iMon. Pneura. SuppL 2, 1865. p. 244; Haiiley & 

 Theobald, Couch. Ind. 1870, pi. 6, fig. 10 ; id., op. cit. 1870, 

 p. XV ; Theobald, Cat. Shells Brit. India, 1876, p. 43 ; Nevill, 

 Hand List, i, 1878 p. 43 (-}- var. minor). 



