1884.] 'lightning' AND ' PORCUPINE ' EXPEDiriONS. 137 



The interstices of the rihs in this species are regularly and dis- 

 tinctly striated in the direction of the spire. My largest specimen 

 from the 'Porcupine' Expedition is three quarters of an inch in 

 length by nearly half an inch in breadth. 



I have also from Rasel Anioush fragments of a species which 

 appears to be S.frondicula of Searles Wood. That species is more 

 slender and has more ribs than S. frondosa. As a Pliocene fossil 

 it occurs in the Coralline Crag of Suffolk, the Antwerp Crag, and 

 at Reggio in Calabria. Monterosato gives Palermo and S. Vito for 

 S. frondicula as a recent or living species. 



y 11. SCALARIA TREVELYANA, Leach. 



S. trevelyuna (Leach, MS.), AVinch on the Geology of Liudisfarn, 

 in Ann. Phil, new series, iv. p. 434 : B. C. iv. p. 93 ; v. p. 209, 

 pi. Ixxi. f.4. 



'Porcupine' Exp. 1869: St. 1, 2, 3, 6, 9, 14, 15, 18, 25, 35,45, 

 C8, off Lerwick. 1870: Atl. 2, 17a, 27-28|. 



Disfiibution. Bergen to the Ray of Biscay ; 15-G45 fms. 



Fossil. Miocene ? : Malaga. Pliocene : lied and Norwich Crag, 

 Bidt, and Italy. 



S. pseudopulchella of Seguenza. 



12. ScALAuiA COMMUNIS, Lamarck. 



S. communis. Lam. An. s. Vert. vi. (2), p. 228 : B. C. iv. p. 91, 

 pi. ii. f 3 ; V. pi. Ixxi. f. 3. 



' Porcupine ' Exp. 1869 : St. Donegal B. 1870 : Atl. C. Sagres : 

 Med. Algeciras B., Adventure Bank. 



Distribution. Finmark (Lilljeborff) and western coast of Norway 

 to the JE^can Sen, Adriatic, Canaries ; living between tide-marks to 

 49 fms. 



Fossil. Pliocene : Bordeaux Basin. Pliocene : Eed Crag, Nice, 

 and Italy. Post-tertiary : Norwaj', Cumbrae, Ireland, West Cheshire, 

 Selsea, S. France, Leghorn, Vesuvius, and Morea : 0-50 ft. 



Turbo clathrus of the ' Fauna Suecica,' and of the lOtli and pre- 

 ceding editions of the ' Systema Naturae.' Petit therefore named 

 the present species S. clathrus, which is more correct than S. com- 

 munis according to the recognized laws of nomenclature. 



U 13. SCALARIA GROSNLANDICA, ChcmnitZ. 



Turbo clathrus grccnlandicus, Chemn, Conch. Cab. xi. p. 155, 

 t. 195 A. f. 1878, 1879. 



8. grcenlandica, B . C. iv. p. 97. 



'Lightning' Exp. St. 2. 



' Porcupine' Exp. 1869: St. 65. A living specimen from the 

 last Station (345 fathoms) was nearly two inches long. The animal 

 having been put into boiling water was removed from the shell and 

 kept in spirit of wine ; it then gave out a deep violet dye, which did 

 not fade for many years. 



