MOLLUSCA OF THE ' CHALLENGER ' EXPEDITION. 



29 



Gen. PuNCTUEELLA, B. T. Lows. 



[Since tlie publication of this group I have had the opportunity, 

 through the kinduess of Dr. Gwyn Jeffreys and of Prof. Seguenza, 

 of examining some species described by them or in their hands ; 

 and I am satisfied that P. craticia, "Wats., is Himula asturiana, 

 Pischer, of the ' Travailleur ' Expedition, 1880 ; that P. tuherciolata, 

 "Wats., is 'Bimula granulata, Seg., an Upper-Miocene fossil ; that 

 P. plecta, Wats., is P. clatlirata, Jeffr., of which, however, as an 

 uupublislied species mine must, to my regret (for the species has 

 long been differentiated by Dr. Gwyn Jeffreys), take precedence ; 

 that P. acuta, Wats., is the P. profandi, JefFr., not, however, a 

 Fissurisepta, Seg., for it retains its apex, nor indeed a simple 

 Puncturella, for its delicate septum is a broad straight lamina 

 extending direct from side to side of the shell, and advancing 

 obliquely a considerable way down the interior of the shell (see 

 * Valorous ' Gastropoda, Ann. & Mag. N. H. Mar. 1877, p. 232); 

 and that P. acuminata, Wats., is one of the varieties of Fissuri- 

 septa rostrata, Seg., an Upper-Miocene fossil. The identification 

 of these "West-Indian mollusks with Miocene fossils and with a 

 species living in the Bay of Biscay (600 to 1100 fms.) is obviously 

 of much greater interest and importance than the mere multi- 

 plication of new species.] 



1. P. (Cranopsis) asturiana, Fischer. 



2. P. (C.) granulata, Seg. 



3. P. agger, ii. sp. 



4. P. brycliia, n. sp. 



5. P. n. sp. (?) 



6. P. plecia, n. sp. 



7. P. profundi, Jeffr. 



8. P. oxia, n. sp. 



9. P. sportella, n, sp. 



10. P. {Fissurisepta) rostrata, Seg. 



1, PUNCTUEELLA (CeANOPSIS) ASTUEIANA, MscJwr [CEATICIA, 



n, sp.]. 



St. 21. March 25, 1873. Lat. 18° 38'30" N.,long. 65'^ 5' 30" W. 

 Off" St. Thomas, north of Culebra Island, Danish "W. Indies. 

 390 fms. Coral-mud. 



Pischer, ' Journal de Conchyllologie,' 1882, p. 51 (jRimuld). 



Shell. — Grey, thin, depressed, oval, considerably broader in 

 front than behind ; with straight conical sides, convex in front and 

 concave behind, where in particular the margin is a little patu- 

 lous : it is scored with sharpish ribs and concentric threads ; 

 the lanceolate slit is large and very low placed. Sculpture. 

 Prom the point 30 to 40 sharpish ribs radiate out, in whose 

 interstices as they diverge smaller ones appear, which finally rival 



