244 PUNCTURELLA. 



anterior furrow ; the slit, as seen from within, is round and is very 

 little interfered with by the short, thin, triangular, straight-edged, 

 little-oblique septum. Length 0*21, breadth 046, alt. 044 inch. 

 ( Wats.) 



It was with very great hesitation I united the Challenger speci- 

 mens to this species ; and in my paper to the Linnean Society (loc. 

 cit.) I mentioned various points of distinction between the forms. 

 Even there, however, I suggested that a fuller series of specimens 

 than I had seen at the time I wrote might supply connecting links 

 between them. This actually proved to be the case, so enabling 

 me — though only at the very last moment and after my paper was 

 in print — to suppress the name I had chosen for the species and to 

 adopt that of the late Dr. Gwyn Jeffreys. ( Wats.) 



North Atlantic, 740-1750 fins. ; Off Culebra Inland, West Indies, 

 390 fms. 



P. profundi Jeffr., Ann. Mag. N. H. ser. 4, xix, p. 232, 1877 ; 

 P. Z. S. 1882, p. 675, t. 1, f. 10.— P. (Cranopsis) profundi Wats., 

 Challenger Gastrop. p. 47. 



Section Fissurisepta Seguenza, 1863. 



Fissurisepta Seguenza, Pal. Malac. Terz. Messina, in Annali 

 deH'Accademia degli Aspiranti Naturalisti, 3d series, vol. ii, 1862, 

 p. 83 (1863). First species F. papillosa Seg., I. c, p. 84, t. 4, fig. 2. 



Fissurisepta is an erect, conical Puncturella in which the short oval 

 fissure has wholly absorbed the apex. The internal septum is well 

 developed ; there is no radiating sculpture, the smoothness of the sur- 

 face being broken only by tiny tubercles or granules, which are better 

 developed in species of this section than in the more coarsely sculpt- 

 ured forms, although they are as a general rule, to be seen on all 

 Puncturella species. 



P. papillosa Seguenza. PI. 64, figs. 16, 17, 18. 



Shell ovate, small, elevated, conical, very thin ; aperture horizon- 

 tal, ovate ; internal plate a little curved ; surface outside ornamented 

 with papilla? arranged in longitudinal lines. 



Length 2'8, width P9, alt. 2 mill. (Seg.) 



North Atlantic. 



F. papillosa Seg. Ann. dell'Ac. Aspir. Nat. 1862, p. 84, t. 4, f. 2, 

 2a, 2b.— Jeffreys, P. Z. S. 1882, p. 675. 



Described as a Sicilian Miocene fossil. 



