Mr. E. A. Smith on Arctic Mollusca. 137 



development of the epidermal filaments ; and others, in bad 

 condition, do not display evidences of their former presence. 

 With regard to " strong ridges [on the bodj-whorl] at rather 

 distant intervals, marking the termination or commencement 

 of the periodical stages of growth " [Hinds) ^ I should add that 

 this character is frequently, indeed generally, present in typical 

 specimens of horealis^ and therefore I think that these two 

 characters upon which Hinds establishes his species are not 

 definitely specific. T. cancellata^ Hinds, considered by Jef- 

 freys to be synonyinous with this species, appears to me suffi- 

 ciently distinct. 



I take this opportunity of correcting an error or two 

 which occur in the monograph of this genus in the * Concho- 

 logia Iconica.' Mr. Sowerby figures (pi. ii. fig. 6) a species 

 under the name jiavidula, Hinds, ' Voyage of the Sulplmr.' 

 The correct name of this species, which was described by 

 Hinds in the ' Proceedings of the Zoological Society,' 1843, 

 p. 18, and not in the ' Sulphur,' isjlavida. The following 

 species — T. cedo-nidli, T. conwa, and T. quadricarinata — are 

 quoted by Sowerby (' Conchologia Iconica ') as existing in the 

 British Museum. On comparing the monograph in that work 

 with that in the ' Thesaurus,' it will be seen that the figures 

 in the former, with the exception of T. clathrata^ which is 

 additional, are merely copies of those in the latter. 



None of these three species are now in the Museum ; but 

 whether at the time of the preparation of the first monograph 

 they were in the Cumingian collection I cannot say. If 

 such were the case, I suppose they must have been lost before 

 that collection was deposited in the Museum, or they certainly 

 would now be with the other species of the genus. The fact 

 of Sowerby (in the 'Conch. Icon.' August 1874) asserting their 

 presence in the national collection is no guarantee of their 

 existence there, because, besides his well-known inaccuracy, 

 in this instance having merely copied his old monograph, he 

 presumes that the shells exist in the Museum. T. Kuzeri in 

 both works should be T. Kroyeri, Philippi. 



Velutina [Morvillia) zonata, var. grandis. 



Velutina zonata, Gould, Invert. Mass. ed. 1, p. 242, f. 160, ed. 2, p. 335, 

 f. 606 ; De Kay, Moll. N. Y. pi. 23. f. 253 ; Reeve, Conch. Syst. 

 pi. 147. f. 3, 4. 



Moi-villia zonata, Gray, Guide Moll. Brit. Mus. p. 45. 



Velutina {Morvillia) zonata, Morch, Arctic Manual, 1875, p. 126. 



Hob. Franklin-Pierce Bay [Hart). 



The only specimen was taken out of the stomach of Phoca 

 harhata^ and is in very bad condition. This variety is so very 



