152 GASTROCOPTA, EAST INDIES, POLYNESIA. 



writes: "I obtained Mr. Pease's type specimen of nit ens at 

 Ebon, a low coral island in the Caroline or Marshall group. 

 When he described that species he was not aware that Mr. 

 Shuttleworth had anticipated him in his pediculus, described 

 from Tahitian and Marquesian examples" (Proc. A. N. S. 

 Phila., 1879, 20). 



Pupa hyalina. Shell dextrally wound, ovate, minute, um- 

 bilical chink deep, striae scarcely visible, a little shining, pel- 

 lucid, dirty white. Spire narrowing from the last whorl, apex 

 obtuse. Whorls 4 or 5, strongly convex, joined by a deep 

 suture, the last compressed below, at base rounded carinate. 

 Aperture rather large, truncate-ovate, contracted by 5 white, 

 dentiform folds : two in the radius, one anterior, lamellif orm, 

 bipartite, running to the parietal margin; two in the palate, 

 the lower one at the base; margins of the aperture broadly 

 separated above, strongly reflected, white-calloused within. 

 Alt. 2%, diam. 1% mm. Habitat in insula Taheiti (Zelebor). 



The above description agrees well with pediculus. Speci- 

 mens of that species from Tahiti seen by Shuttleworth, Boett- 

 ger, Garrett and the writer do not differ from Marquesan 

 examples. 



90. GASTROCOPTA MICROSOMA (Tapperone-Canefri). PL 24, 

 %. 9. 



Shell very minute, openly rimate, obliquely substriate, thin, 

 pellucid, pale corneous. Spire cylindric-conic, the apex ob- 

 tuse. Whorls 5, convex and separated by a deep suture, the 

 last subcompressed behind the aperture. Aperture quadrate- 

 rounded, about one-third the total length of the shell. Peri- 

 stome interrupted, a little expanded and subreflected through- 

 out. Apertural laminae 4: angular subimmersed and bifid; 

 columella rather strong; two inconspicuous palatals. Length 

 21/2, diam. 1 mm. (T.-C.). 



Aru Is. : Wokan (Beccari). 



Pupa microsoma TAPP. CAN., Ann. Mus. Civ. Stor. Nat. 

 Genova, xix, 1883, p. 107, pi. 2, f. 1, 2. 



The rather indefinite figure, which is copied on my plate, 

 suggests the servilis group; but in the absence of specimens 

 I cannot decide upon its affinities. 



