CALTCIA. 21 



and unexpanded, columellar margin narrowly reflexed above. Man- 

 tle blue ; foot very broad, apparently having pedal grooves. Jaw 

 (pi. 4, fig. 25) extremely thin, with two weakly indicated ribs in the 

 middle, and a median projection on the concave margin. Radula 

 (pi. 4, figs. 22, 23, 24) with rows of teeth meeting at an angle in the 

 middle ; central tooth tricuspid, very narrow, with a long basal plate; 

 side teeth with two cusps, even to the extreme marginals (fig. 24) ; 

 the cusps of all the teeth broad and rounded. Genitalia (pi. 4, fig. 

 26) with the penis swollen in the middle and distally, where a short 

 epiphallus is inserted ; no flagellum. Duct of the spermatheca ex- 

 tremely short, entering low, close to the atrium ; other female organs 

 as usual. 



Type, C. crystallina. Distribution, New Guinea, and some adja- 

 cent, faunally similar, islands. The species are arboreal. 



The anatomy of C. crystallina, investigated by Mr. G. Schacko, 

 shows this genus to belong to the Zonitidce. The foot has grooves 

 above its lateral margins, so far as one can judge from the published 

 figure; but Schacko unfortunately fails to mention the structure of 

 the foot-edge. The dentition seems to be essentially Zonitoid, but 

 with the cusps of the teeth broadened, as in arboreal snails generally. 



C. CRYSTALLINA (Reeve). PI. 4, figs. 16, 17, 18. 



Shell subperforate, ovate-conic, thin, striate, decussated by close 

 spiral sulci ; pellucid, glassy-whitish ; spire conic, obtuse. Whorls 

 5^, nearly flat, the last a little longer than the spire, more convex, 

 obtusely carinated below the middle. Columella somewhat straight- 

 ened, brownish, a little reflexed above. Aperture oblique, subtetra- 

 gonal-oval ; peristome simple, unexpanded. 



Length 50, diam. 29 mill.; aperture 30 mill, long, 19 wide (Pfr.). 



New Guinea : Port Dorey (Ratfray) ; Maccluer Gulf (Gazelle 

 Exped.); Sorong Island (L. M. D'Albertis); Waighiu (Wallace). 



Bulimus crystallinus REEVE, Conch. Icon., pi. 32, f. 194 (July, 

 1848). PFR., Monogr. iii, p. 389 ; iv, 451 ; vi, 90, Orthalicus crys- 

 tallinus H. & A. AD., Genera, ii, p. 154. Limicolaria crystallina 

 SHUTTL., Notitise Malacol. i, p. 54. Calycia crystallina H. ADAMS, 



in Wallace, P. Z. S., 1865, p. 412 TAPPARONE-CANEFRI, Annali 



Mus. Civ. Genov. xix, p. 100, fig. ; xx, p. 145. MARTENS, Con- 

 chol. Mittheil. ii, p. 13; Archiv f. Naturg., 1897, p. 43, pi. 9, f. 4 

 (shell), f. 1-3, a, b, c, K (soft anatomy, by G. Schacko) ; with var. 

 gracilior^ t. c., p. 44. 



