SYKES : MOLLUSCA OF " PORCUPINE " EXPEDITIONS. 185 



The specimens from Station 6 are only fragments of the earlier 

 whorls. 



H^DROPLEURA RUFA (Montagu). 



Murex rufas, Montagu: Test. Brit., p. 263. 

 Hcedropleura rufa, Montagu: Kobelt, p. 328. 



"Porcupine" Expedition, 1869, Lough Foyle, 10 fathoms; also 

 a young, very dead shell from " W. Ireland, 73 fath." 



Distribution. — Finmark to the British and French coasts. A Tertiary 

 fossil. 



H^DROPLEURA SEPTANGULARIS (Moutagu). 



Murex septangular is ^ Montagu : Test. Brit., 1803, p. 268, pi. ix, fig. 5. 

 Htedropleura septangular is ^ Montagu : Kobelt, p. 326. 



"Porcupine" Expeditiou, 1870, Adventure Bank, 92 fathoms. 



Distribution. — From Bergen to the Mediterranean, also Madeira and 

 Canaries (Jeffreys). A Tertiary fossil of Southern Europe. 



According to Jeffreys the Pleurotoma .^geensis of Forbes is, "ex 

 typ ," a synonym, while Mangelia rigida (Forbes), Reeve, is a variety. 



SCRCULA TJNDATIRUGA (Bivona), 



Pleurotoma undatiruga^ Bivona: Gen. Posth., p. 7. 

 Surcula undatiruga, Bivona : Kobelt, p. 330. 



"Porcupine" Expedition, 1870, Station 50; off Cape Sagres, 

 45-58 fathoms. 



Distribution.— Yavious localities in the Western Mediterranean, 

 especially off the Algerian coast; also off N.W, Africa and to the 

 Canaries. A Pliocene fossil. 



One specimen (young) in the Museum has met with an accident, 

 causing the animal to form a new mouth at an angle to the old one, 

 and from the back view to resemble a Vertagus. 



Mangelia costata (Donovan). 

 Murex costatus, Donovan : Brit. Shells, vol. iii, pi. xci. 

 Mangelia costata, Donovan: Kobelt, p. 343. 



"Porcupine" Expedition, 1869, off Lerwick, 10-66 fathoms 

 (var. coarctata) ; 1870, Station 50 (and var. coarctata) ; Vigo Bay, 

 20 fathoms (and var. coarctata); Tangier Bay, 35 fathoms; Adventure 

 Bank, 92 fathoms (with var. coarctata and a white var.). 



Distribution. — Finmark to the Mediterranean and Tenerife. 

 European Tertiary fossil. 



Mangelia rugulosa (Philippi). 

 Pleurotoma rugulosmn, Philippi: Enum. Moll. Sicil., vol. ii, p. 169. 

 Mangelia rugulosa, Philippi : Kobelt, p. 336. 



"Porcupine" Expedition, 1870, Station 50; Adventure Bank, 

 92 fathoms. 



Distribution. — From the British Isles to the Mediterranean. 

 A Tertiary fossil. 



Bellardiella gracilis (Montagu). 

 Murex gracilis, Montagu: Test. Brit., 1803, p. 207. 

 Bellardiella gracilis, Montagu : Kobelt, p. 348. 



VOL. VII,— SEPTEMBER, 1906. 13 



