PARTULA, NEW HEBRIDES. 285 



phery of the last whorl is angular, base with no spiral striae. 

 The columella is long, vertical, rather heavily calloused, taper- 

 ing and somewhat excised 'below, not unlike the columella 

 in some forms of Obeliscus. The axis is perforated. 



Mr. Sykes states that 'the specimens from Do Island col- 

 lected 'by Mr. J. J. Walker are a local race. 



74. P. PRATERNA Hartman. PL 34, fig. 4. 



The shell is rather widely and deeply rimate, solid, ovate- 

 conic. Last whorl whitish below the suture, elsewhere cov- 

 ered with a faintly green tinted yellow cuticle which is in- 

 distinctly streaked with brighter yellow ; the spire brown, be- 

 coming darker towards the apex;* suture well impressed, 

 marked with a whitish line. Apex obtuse, the top more 

 rounded and the sides less straightened than in P. caledomca, 

 brazieri etc. ; embryonic whorls punctate-striate, convex ; sub- 

 sequent whorls convex, engraved with rather delicate spirals, 

 almost obsolete on the upper part of the last whorl, but dis- 

 tinct though delicate on the base. The last whorl is a little 

 flattened laterally behind the aperture, convex and somewhat 

 sack-like basally. Aperture fleshy within, ovate, hardly 

 oblique. Peristome rather narrowly expanded and -re-flexed, 

 thickened within, tapering at the upper end. Columellar 

 margin broadly reflexed, dilated and biramose above. Parietal 

 callus thin, transparent, thickened at its junctions with the 

 lip ends. 



Length 20.2, diam. 11.8, aperture 10.9 mm. ; whorls 5~y 3 . 



New Hebrides: Aura ( ? Arag) Island (Layard, type loc.) ; 

 Ravenga, Vamia Lavu; Lakona, Gaua (J. J. Walker). 



Partula fraterna HARTM., Proc. A. N. S. Phila. 1888, p. 

 250, pi. 13, f. 2 (Oct. 23, 1888). SYKES, Proc. Malac. Soc. 

 Lond. v, 198. 



This rather stout, opaque species has some resemblance to 

 P. carnicolor, but differs by its shorter form, wider umbilical 

 fissure and the much more convex base. The embryonic 

 whorls are more convex than in the group of P. turneri, and 

 the apex is more obtuse. It is closely related to P. auraniana 



