DEFRANCIA. 363 



spire except at the apex (the fissure being apparently formed 

 subsequently to the embryonic growth) by the striated groove, 

 which is of a thinner substance than the other part of the 

 shell : inner lip very slight and narrow : pillar long and nearly 

 ,8traight. L. 0-6. B. 0-2. 



Habitat : Shelly and sandy ground, in 15-85 i., 

 Shetland and the west of Scotland (Forbes and others); 

 Orkneys, in 15 and 80 f. (Thomas, fide F. & H.); co. 

 Antrim (Hyndman); Connemara, 14 f. (Barlee and J. 

 G. J.); deep-sea soundings off the west of Ireland 

 (Hoskyns) ; Berwick Bay (Mennell) ; Durham and 

 Northumberland (Abbes, Howse, and Alder) ; Plymouth 

 (Jordan); Cornwall (Peach, Cocks, and Hockin): not 

 common. Apparently an Appulian and Calabrian fossil, 

 as the Pleurotoma Renieri of Scacchi (Philippi) . It has 

 both a northern and southern range, comprising Norway 

 (Loven, as P. horeale, and others), Sweden (Malm), 

 north of Spain (M'^ Andrew) , both sides of the Medi- 

 terranean (Testa, as P. TreccM, Philippi, M*^ Andrew, 

 and Martin), JEgean (Forbes), Adriatic (Barbieri, fide 

 Brusina, as Raphitoma Barbierii) , and jMadeira and the 

 Canaries (M^Andrew); depths 18-120 f. 



It crawls slowly, and floats in a supine position like 

 many of its congeners. My largest specimen is three- 

 quarters of an inch long. 



2. D. gra'cilis^, Montagu. 



Murex gracilis, Mont. Test. Br. (i.) p. 267, 1. 15. f. 5. Mangelia gracilis, 

 F. & H. iii. p. 473, pi. cxiv. f. 4, and (animal) pi, RR. f. 8, 



Body white, closely but irregularly speckled with pink and 

 flake-white : pallial tube somewhat extensile, usually short : 

 head bulbous : tentacles extremely short — mere points above 

 the eyes ; below the eyes they are cylindrical and stout : eyes 



* Slender. 



r2 



