370 HELICINID^. 



marked with closely set radial growth-lines ; colour light orange- 

 yellow marked with more or less distinct reddish-bro\^■n radial 

 bands ; spire of 4j whorls, inci'easing regularly and somewhat 

 rapidly in size, tlie last whorl obtusely keeled, thekeel produced into 

 a prominent angular projection at the peristome. Aperture semi- 

 lunar, very oblique, the outer margin thickened and expanded. 

 Basal callus not very thick, hardly differing in colour from the rest 

 of the shell, of rather small extent, its limits clearly defined above, 

 as well as below. The whole shell deeper in proportion to its 

 breadth than in A. andamanica and the spire more prominent. 



" Operculum yellowish white in colour, the calcareous plate 

 rather thin, the sigmoid curve pronounced, the upper angle 

 produced. 



"lladula with small diamond-shaped median tooth; the first 

 admedian tooth more than twice as long as broad, the anterior 

 edge incurved and bearing four denticulations ; second and third 

 admedian teeth each with four denticulations ; the lateral teeth 

 normal, the stalk rather long, the articular excaration deep, the 

 aliform process bearing seven round denticulations." {Bourne) 



Hah. Andaman Is. (Ror/ers). 



572. Helicina scrupulum, Benson. 



Helicina scrupulum, Benson, A. M.N. H. ser. 3, xii, 1863, p. 42o; 

 Ilanley & Theobald, Conch. Ind. 1875, pi. 133, figs. 8, 9 ; 

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

 List, i, 1878, p. 32o. 



Original descri^ytion : — " H. testa parva, sublenticulari, crassi- 

 uscula, sublaevigata, vix nitidula, luinutissime oblique striatula. 

 superne fuscescente, aufractu ultimo albido-cornea, supra peri- 

 pheriam fasciis 2 rufescentibus inferiore latiore ornata ; spira 

 depresso-conoidea, apice obtuso, sutura lineari ; anfractibus 4^, 

 supei-ioribus vix convexiusculis, ultimo obtuse angulato ; apertura 

 obliqua. subtriangulari-lunata ; peristomate expanse, reflexiusculo, 

 marginibus callo magno incrassato subcirculari retrorsum expanso 

 polito junctis. (^perc-ulo tenui, albido. 



"Diam. 5, alt. 3 mill." [Benson.) 



Hah. Andaman Is. : Mt. Harriet, Andaman Is. {Nevill) ; 

 Nicobars? {Stoliczlca). 



