1882.] 'lightning' AND ' PORCUPINE ' EXPEDITIONS. 675 



Family III. Fissurellid^. 

 / 1. FissuRisEPTA granulosa', Jeffreys. (Plate L. fig. 9.) 



Shell roundish-oval, conical, but somewhat depressed except 

 towards the apex, thin, opaque, and lustreless: sculpture, very 

 numerous fine and delicate striae which radiate from the apex or 

 beak, and are closelv covered with minute tubercles ; some of these 

 strife do not quite extend to the apex, and are alternately larger and 

 smaller ; the apex is irregularly tubcrcled : margin finely crenated 

 or notched by the striae : foramen nearly circular : inside smooth, 

 but not poHshed : septum triangular, covering about half only of the 

 foramen on the underside. L. 0'125, B. O'l. 



' Porcupine' Exp. 1870 : Atl. St. 24. A single specimen. 



Distribution. Drobak, Norway ; .50 fms. 



In my paper on Norwegian MoUusca ('Annals and Magazine of 

 Natural History ' for June 1869) I named this remarkable shell as 

 F. papulosa of Seguenza ; but I afterwards found that I was mistaken 

 as to the species. The shell now described is more delicate, and the 

 sculpture is much finer, with regular and close-set striae which are 

 studded with far more numerous and minute tubercles. The fora- 

 men is circular in the present species, and triangular in P. papillosa. 



Seguenza's genus Fissurisepta differs from Fissurella in having an 

 internal septum or plate, as in Propilidium and Puncturella, and a 

 foramen as in the last named genus ; but it wants the spire which 

 is peculiar to those two genera, and which is never deciduous. 



^"^ 2. Fissurisepta papillosa, Seguenza. 



jF. papillosa, Seg. Paleont. Malac. d. Messina (Ann. dell' Accad. 

 d. Aspir. Nat. 1862), separate copy, p. 10, tav. iv. f. 2, 2a, 2b. 



'Porcupine' Exp. 1870: Atl. St. 16, 17, 17a. Several speci- 

 mens. 



Fossil. Miocene ? : Roraetta near Messina. Pliocene : Calabria. 



This species varies with respect to the size of the tubercles or 

 papillae. Some recent and fossil specimens have very few and slight 

 scattered tubercles, or are nearly smooth. The recent are rather 

 larger than the fossil specimens, and have usually stronger 

 tubercles. 



K 3. Fissurisepta rostrata, Seguenza. 



F. rostrata, Seg. Paleont, Malac. d. Messina (Ann. dell' Accad. 

 d. Aspir. Nat. 1862), separate copy, p. 10, tav. iv. f. 3, '6a, 36. 



'Porcupine' Exp. 1870 : Atl. St. 16, 17, 17a. Several specimens 

 of this extraordinary shell, exactly agreeing with fossil specimens 

 from Sicily which I received from my kind friend and corre- 

 spondent. Prof. Seguenza. 



Distribution. Bay of Biscay (' Travailleur ' Exp. 1881); 1093 

 fms. Off Bermudas (' Challenger ' Exp.) ; 1375 fms. 



Fossil. Miocene ? : Sicily. Pliocene : Sicily. 



^1. Puncturella profundi, Jeffreys. (Plate L. fig. 10.) 

 P profundi, Jeffr. in Ann. & Mag. N. H. March 1877, p. 232. 

 ' Covered with granules. 



