MUREX. 45 



insequalibus, late alatis, superne late elevatis et faleatis, 

 radiatim canaliferis, ad margine undulatim inflexis, infra 

 medium canali terminis ; spira breviuscula, ver us apicem 

 multivaricosa. — There are specimens in the British Museum 

 more finely developed than those originally drawn. I cannot 

 regard M. aduncus as the same species. 



207. aduncus, f. 216, Sowb.— Testa pallida, fusco late 

 fasciata, breviter trigona, spiraliter costata ; varicibus late 

 alatis laminatim extantibus, supra angulum breviter uncinatis, 

 replicatis, ad canalem coarctatis, anfractuum superiorum 

 numerosis, brevioribus, spira brevi ; canali conspicue later- 

 aliter recurvo. — The shortness of this shell, the cross-ribs, 

 and wide lateral expansion of the wing-like varices will not 

 permit me to regard it, with Keeve, as a mere modification 

 of M. fttlcatus. Besides Mr. Norris's specimen originally 

 figured, there is a rather immature one in the British Museum. 



Sect. IX. Varices irregular. 



208. erinaceus, f. 202, LinncBus. — Testa subovata, rufo- 

 fulva vel adnata, spiraliter costata, varicibus numerosis aut 

 raris, inosqualibus, fronte lacineatis, lobatis, radiatim minute 

 foveolatis ; apertura subtrigona, margine dentato, canali 

 lateraliter subrecurvo. — The varices in this species are of 

 extremely variable and irregular growth. 



209. torosus, f. 195, Lamarck. — Testa breviter subtrigona, 

 fumoso-fusca, solida, spiraliter costata, costis quinis, crassis, 

 latis, prominentibus, interstitialibus parvis, squamoso-crenatis, 

 varicibus irregularibus ad costas exfoliatis ; apertura majus- 

 cula, margine externo undulatim crenato, intus denticulato, 

 spira brevi, anfractibus angulatis, superne excavatis. — This 

 species seems to have some affinity with M. erinaceus. 

 Keeve and others incline to the opinion that it may be only 

 a distorted form of it. 



210. caliginosus, f. 193, Reeve. — Testa subtrigona, utrin- 

 que acuminata, fusca lsevis, spiraliter costata, costis latis, 

 planatis, interstitiis angustis, profundis ; varicibus senis, ad 

 costas exfoliatis, ad angulum anfractuum productis ; spira 

 acuminata ; anfractibus angulatis, supra angulum plano- 

 depressis, ad canalem coarctatis ; canali lateraliter recurvo. — 

 This species, like M. torulosus, is probably an ally of M. 

 erinaceus, and may even be one of its erratic forms. 



