1884.] 'lightning' and 'porcupine 1 expeditions. 141 



Distribution. From Nice to the Archipelago and the coast of 

 Dalmatia, Madeira, and Canaries off Sahara (' Talisman ' Exp.); 

 40-1261 fms. 



Fossil. Miocene : Vienna Basin. 



S. scacehii of Homes and S. crassilabrum of G. B. Sowerby. Not 

 S. coronata of Lamarck. Although the Report of Prof. Forbes and 

 the second volume of Dr. Philippi's work bear the same date, the 

 former was published in 1843 at the Annual Meeting of the British 

 Association for the Advancement of Science, and appeared in the 

 'Athenaeum' and other periodicals of that year. I therefore 

 consider that the specific name given by Forbes is entitled to priority. 



The first whorls in this species, as is mostly the case in the genus 

 Scalaria, are smooth and polished, forming a sharp spike of a 

 reddish-brown colour. 



y 21. Scalaria crenata, Linne. 



Turbo crenatus, L. S. N. p. 1238; Chemn. Conch. Cab. xi. 

 p. 156, t. 195 A. f. 1880, 1881. 



S. crenata, G. B. Sowerby, Thesaurus Conchyliorum, i. pi. xxxv. 

 f. 123. 



* Porcupine ' Exp. 1870 : Atl. St. Gibraltar B. 



Distribution. Herm in the Channel Isles, a small and worn 

 specimen (F. G. Lukis) !, Atlantic coasts of France and Spain (de 

 Folin), Mediterranean, Mogador, and Canaries (McAndrew) ; 3-50 

 fms. 



The body of this mollusk is of a yellowish hue mottled with 

 white ; the snout or rostrum is thick and strong ; the tentacles are 

 spike-shaped, rather long and slender, of a yellowish colour ; the 

 eyes are small and black, seated on a slight prominence near the 

 outer base of each tentacle ; the foot is thick and short. Animal 

 shy or easily alarmed. 



Acirsa pr,elonga, Jeffreys. (Plate X. fig. 11.) 

 A.proelonga, Jeffr. in Ann. & Mag. N. H. 1877, p. 241. 

 •Porcupine' Exp. 1870 : Atl. St. 16. A single specimen. 

 Distribution. 'Valorous' Exp. St. 12; 1450 fms. Also a 

 single specimen from that Expedition. 



Summary of the foregoing List. 



Families. Genera. Number of 



Species. 



IX. LITTORINIDiE (continued) Rissoa 42 



Hydrobia .... 2 



X. PALUDINIDiE Bithynia 1 



XI. HETEROPHROSYNID.E.. Barleeia 1 



XII. SKENEID.E Homalogyra . . 1 



XIII. VERMETIDjE Siliquaria. ... 1 



