342 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxx. 



The typo belonjis to the Danker collection and conies from Upolu, 

 one of the Sunioan Islands. It has twelve post-nuclear whorls and 

 measures: long, i.5 nun.; diam. 1 mm. The nuclear whorls measure 

 ahout 1 mm. long. This species is the type of the subgenus Xisiftz/'ri.^, 

 which ditiers from Chnn/ritzla s. s. hj having the peculiar nucleus 

 of the present species. 



TURBONILLA ( STRIOTURBONILLA) MONOCYCLA A. Adams. 



Plate XXII, fig. 8. 



Turhonilla moiioci/da A. Adams, Ann. Mag. Nat. Hist., VI, 1.S60, p. 418; not 

 Parlltenia (^Odoxtoniia (Egilcif)) moitoeycUi A. Adams. 



Shell elongate-conic, slender, slightly umbilicated, milk-white. 

 Niu'lear whorls small, almost completel}' obliquely immersed in the 

 first post-nuclear whorl. Post-nuclear whorls very finely, wavih', 

 spirally striated, shouldered at the summit, flattened, with a well 

 impressed sulcus at the periphery; marked by strong, decidedly sin- 

 uous axial ribs, of which sixteen occur upon the second, nineteen upon 

 the fifth, and thirty upon the penultimate whorl. These ribs pass 

 over the moderately deep periphei'al sulcus and render the intersec- 

 tions with its edges subnodulose. The entire sulcus to the anterior 

 edge is visible above the suture; this therefore appears very deep. 

 Intercostal spaces not quite as wide as the ribs. Base well rounded, 

 sculi)tured by the continuation of the axial ribs, which extend to the 

 umbilicus, and the minute spiral striation. Aperture rather large, 

 suboval, posterior angle obtuse; outer lip thin, showing the external 

 sculpture within by transmitted light; cohmiella slender, curved, and 

 revolute, provided with a quite strong oblique fold at its insertion. 



The specimen described belongs to the Pa?tel collection, and comes 

 from flapan. It has eight post-nuclear whorls, and measures: long. -t.S 

 nun. ; diam. 1.5 mm. Another lot from the same collection and locality 

 contains two additional specimens, both immature. 



TURBONILLA (PYRGISCULUS) CANDIDISSIMA, new name. 



Plate XVII, fig. :\. 



= Dunkeria cmidida A. Adams, Ann. Mag. Nat. Hist., VIII, 1861, p. 801; not 

 ClieiiDiitzIa cuiidida A. Adams, Proi-. Zool. Soc, IH'VA; nor Turhoiiilla Candida 

 OK Foi.iN, Fonds de la Mer, I, 1871. 



Shell, milk-white, elongate-conic, with strongly, slopingly shoul- 

 dered whorls. Nudeai- whorls small, o])liquely almost completely 

 immersed. Post-nuclear whorls inflated, summits strongly, slopingly 

 shouldered, ornamented by strong, decidedly elevated subacute, axial 

 ribs, of which about twelve occur upon the first, eighteen upon the 

 fifth, and twenty-two upon the penultimate whorl. These ribs extend 

 prominently over the shoulder to the summit. Intercostal spaces 

 about double the width of the axial ri})s, crossed by alternate raised 



