HELICINA. 369 



spira conoidea, apice liitea, acutiuscula ; anti*. 4| planulati ; 

 ultimus coinpresse eb acute cariiiatus, basi modice convexus, callo 

 centrali nilido, j^ranulato iiiuiiitus; columella brevissima, basi 

 obsolete tubereulata ; apertura diagonalis, triangularis ; perist. 

 album, breviter expaiisutn, margiue basali cum columella sub- 

 angulatim juucto. — Operc. margaritaceum. 



" Diam. maj. 74, min. G|, alt. 4 mill." (Pfelff'er.) 



Ilab. Burma : Mergui. 



In his later work on the genus Helicina (Conch. -Cab. 1908, 

 p, 176) Wagner reduces H. meryitlensis and //. aralcanensis to 

 synonyms of H. nicobanca. 



570. Helicina nicobarica, Pfeiffer. 



Helkiiia nicobarica (Philippi), Pfeiffer, Zeits. Malak. iv, 1847, 

 p. 149; id., Conch. -Cab., Ilelicinaceeu, 1850, p. G2, pi. 2, 

 tigs. 19-21 ; id.. Cat. Phaueropn. J3rit. Mus. 1852, p. 29."3 ; id., 

 Mon. Pueuin. 18o2, p. 402; Trvon, Aiuer. Joiu-n. Conch, v, 

 1869, p. Ill ; Stoliczka, J. A. S.B. xxxix, part 2, 1870, p. 88 ; 

 Reeve, Concli. Icon, xix, 1873, Helicina, pi. 21, fig.s. 187 rt, 

 187 6; Pfeiffer, Malak. Bliitt. xxiv, 1877, p. lo7; Nevill, Hand 

 List, i, 1878, p. 324. 



Helicina nicoharicus, Sowerbv, Thes. Couch, iii, 1866, p. 293, 

 pi. 276, fi?s. 381,382. 



Helicina {Pnchi/stonta) nicobarica, Adams, Gen, Rec. Moll, ii, 

 1856, p. 304; Miirch, Jom-n. Conchyl. xx, 1872, p. 318; id., 

 op. cit. xxiv, 1876, p. 3()3. 



Aphanoconin tnert/uicnsia nicobnrica, Wagner, Denks. Kaiserl. 

 Akad. Wiss. Wien, Ixxvii, 1905, p. 402, pi. 6, fig8. 5m-5c. 



Aphanoconia nicobarica, Wagner, Conch. -Cab., Helicina, 1908, 

 p. 176, pi. 34, figs. 20-22. 



Original description : — " T. leiuicularis, tenuiuscula, laevigata, 

 nitidula, albida vel carnea, fasciis 1-2 angustis rubris plerumque 

 ornata ; spira brevis, obtusa ; anfr. 4, planiusculi, ultimus acute 

 cariuatus, basi convexior, interdum striis elevatis spiralibus 

 obsolete cinctus ; apertura subobliqua, obtuse triangularis ; colu- 

 mella brevis, obsolete tubereulata ; perist. acutum, brevissime 

 expansum ; callus basali nitidus, liuea albida circumscriptus. — 

 Operc. tenue, carneum. 



" Diam. 5|, alt. ^ mill." {Pfeiffer.) 



Hab. Nicobar Islands (P/u7v)>y/j) ; Kar Nicobar and Batti Malve 

 (Stoliczl-a) ; Sambelang (Eeinhardt) ; Katclial and IS'ancouri 

 (lioepstorf). 



Nevill mentions a var, ininor (? distinct species) from Batti 

 Malve, but gives no description or measurements. 



Stoliczka (I. c.) was of opinion that //. nicobarica might perhaps 

 be identical with II. scnipulum ; the figures of the two forms do 

 not support this view. 



571. Helicina rogersi, Bourne. 



Aphanoconia royersii, Bourne, P. Z. S. 1911, p. 801, pi. 42, fig. 65 

 (radula), tigs. G6-68 (shell), fig. 69 (operculuGi). 



Original description : — "Shell oblately spheroidal, the surface 



2b 



