STKES : MOLLUSCA. OF " PORCUPINE" EXPEDITIONS. 189 



small form known as var. minor, Jeff., alive); 1870, Algeciras Bay, 

 1-15 fathoms. 



Distrihution. — Mediterranean to the British coasts ; also Belgium 

 (JefPreys MSS.). 



The animal of the live specimen above-mentioned is thus described 

 by Jeffreys. " Body milk-white, witli minute and irregular specks of 

 flake white; mouth thick ; pallial tube long and cylindrical; tentacles 

 thread-shaped, short, extremely thin above the eye-stalks ; eyes black, 

 conspicuous, placed on the top of long stalks which are three times as 

 thick as the tentacles ; foot long, equal in breadtli for two-thirds of 

 its length and narrowing behind ; it is squarish or slightly bilobed 

 and double-edged in front, notched or indented behind." 



I am unable to decide as to the correct specific name for this shell. 

 Sowerby described a Pleurotoma lavigata in 1823 (Min. Conch., 

 vol. iv, pi. 387), as noted by Jeffreys in his MS., and the latter 

 proposed to adopt the name nigra of Pot. & Mich. (Gal. Douai, 

 vol. ii, p. 446). According to Tryon (Man. Conch., vol. vi, p. 224) 

 the latter is, however, identical with Montagu's rufa, and I am not in a 

 position to settle the question. Jeffreys further suggests that P. atrata, 

 0. G. Costa (1839), may be identical with the present species. There 

 is also a Pleurotoma Icevigata of Nyst (1838). 



Raphitoma. nebula (Montagu). 

 Murex nebula, Montagu : Test. Brit., p. 267, pi. xv, fig. 6. 

 Raphitoma {Ginnania) nebula, Mont.: Kobelt, p. 374. 



" Porcupine " Expedition, 1869, Station 68 (var. fusiformis, 

 Marshall); Lough Swilly, 3-13 fathoms; 1870, Station 50 (with 

 var. abbreviata, Jeff.) ; Tangier Bay, 35 fathoms (a live, young, nearly 

 white form); Gibraltar Bay, 3 fathoms; Adventure Bank, 92 fathoms 

 (var. abbreviata, Jeff.). 



Distribution. — Atlantic coast of Europe, also Mediterranean, 

 Canaries, and Madeira. A Tertiary and Post-Tertiary fossil of the 

 British Isles and the Continent. 



Raphitoma ndperrima (Tiberi). 

 Pleurotoma nuperrimum, Tiberi: Descr. nuovi Testacei Medit., 1855, 



p. 14, pi. ii, figs. 7-9. 

 Paphitoma{?) nuperrimum, Tiberi: Kobelt, p. 385. 



"Porcupine" Expedition, 1870, Stations 6, 8, 9, 24, 50; Cartagena 

 Bay, 60-84 fathoms ; Benzert Road, 40-65 fathoms ; Adventure 

 Bank, 92 fathoms. 



Distribution. — Various localities in the Mediterranean and from 

 Arcachon (Locard). 



This shell is better known under the name of hispidula, Jan ; which 

 form appears not to have been described by that author, but by 

 Bellardi in 1848. From the figures given, the recent shell appears to 

 be very closely allied to the fossil, if not identical, but I have 

 followed Dr. Kobelt in their separation, since Jeffreys says, "Not 

 Raphitoma hispidula, Jan, in Foresti's collection from Bologna ; but in 

 other notes I have regarded the fossil and recent species as the same." 



