232 Dr. J. Gwyn Jeffreys on 



Off Goclhavn, 80 fms. ; Station 1, 175 fms. ; 3, 100 fms. ; 

 5, 57 fms. ; Holsteinborg, 35 fms. ; St. 13, 690 fms. 



Circumpolar, and ranging southwards to the west coast of 

 Scotland, Cape Cod, and North Japan, at depths of from 4 to 

 100 fathoms ; also widely distributed in the Pliocene and 

 newer Tertiary strata of northern regions. The apex in the 

 young is spiral, incurved, and deciduous, and it resembles 

 that of Propilidium ; but in the latter the spire is persistent 

 and has two turns instead of onej and L. cceca wants the 

 internal septum. 



Propilidtum ancylo'ides^ Forbes. 

 Patella ? ancyloides, Forb._in Ann. Nat. Hist. vol. v. p. 108, pi. ii. f. 10. 



Station 12, 1450 fms. ; one dead specimen. ' Lightning ' 

 Expedition, 189 fms. ' Porcupine ' Expedition, 1869, west 

 coast of Ireland, 90-1366 fms. : 1870, Bay of Biscay, 220- 

 1095 fms. British and Scandinavian. Mediterranean, off Pi- 

 naido's Chair, 60-160 fms. Bay of Naples, 60 fms. (Acton) ! 



It is the Rostrisepta parva of Seguenza, a Pliocene fossil of 

 Sicily. 



Fissurellidae. 

 Puncturella profundi'* ^ Jeffr. 



Shell conical, with a roundish-oval outline, thin, semi- 

 transparent, of a dull hue : sculpture^ numerous longitudinal 

 and equal-sized strige, and still more numerous but minute and 

 less raised concentric strige, the intersection of which causes a 

 very fine and delicate cancellation and a beading of the longi- 

 tudinal stri^ : colour brownish-white, becoming pale yellowish 

 in dead specimens : heak smooth, incurved and twisted to the 

 left, forming a minute spire of one whorl and a half : slit pear- 

 shaped : mouth roundish-oval : margin very finely scalloped : 

 inside glossy and somewhat nacreous : plate or septum large, 

 triangular, thin, placed vertically in the middle, and occupying 

 the lower third of the inside, so as to separate the anterior 

 from the other half; it is not a vaulted sheath as in P. 

 noachina, nor does it cover (although it apparently protects) 

 the slit or opening at the top. L. 0'25. B. 0*2. 



Station 12, 1450 fms. ; dead specimens. ' Porcupine ' 

 Expedition, 1870, coast of Portugal, 740-1095 fms. 



I have described the shell from a ' Porcupine ' specimen. 

 This differs from P. noacTiina in the size, shape, texture, 

 sculpture, slit, and internal plate. It belongs to the genus 



* Inhabiting the depths of the sea. 



