the West Coast of Davis's Strait. 325 



culum horny : the largest shells are three-quarters of an inch in 

 diameter. 



Dr.Gould, in his ' Kepoit on the Invertebrata of Massachusetts/ 

 describes a species under the name of Margarita cinerea which 

 comes very near to this ; but he considers them distinct, and 

 states that he has compared the two, which I have not had the 

 opportunity of doing. 



Many of the specimens brought by Messrs. Warham and Har- 

 rison show, however, that some of the characters which he con- 

 siders peculiar are not so. The spiral lines frequently cover the 

 whole base, and the whorls of several are angulated by them ; 

 and a few have a slight projecting angle at the aperture. 



The name given to this species in the ' Zoological Journal ' 

 was pre-occupied by a shell described by Dr. Leach in the Ap- 

 pendix to Ross's Voyage, and which has been shown by Mr. J. 

 E. Gray (Zool. Journ. vol. ii. p. 567) to be the same as the Turbo 

 carneus of Lowe, who described from specimens got at Oban four 

 or five years after the publication of the Appendix. I have there- 

 fore ventured to substitute the name proposed above, which is 

 somewhat expressive of the peculiar, dull, soiled appearance of this 

 species. 



Margarita Hamsoni, n. s. PI. V. figs. 4, 5. 



Shell conical, smooth, thin, white, dull, with the spire consi- 

 derably produced, the apex slightly depressed, and the sides some- 

 what bulged ; whorls five or six, much rounded ; sutures deep, 

 with numerous minute, close, depressed, spiral striae, crossed by 

 very minute longitudinal lines of growth ; body- whorl nearly half 

 the length of the shell, well rounded beneath ; mouth round, 

 outer lip thin, entire ; pillar-lip slightly reflected over the umbi- 

 licus, which is not very large ; interior of a most brilliant nacreous 

 green. Diameter | ths of an inch ; height fths of an inch. 



The surface of this pretty and very distinct species has a soft, 

 smooth, waxy appearance ; it is occasionally of a livid hue, and 

 is generally more or less tinged with greenish yellow, having a 

 subdued pearly lustre. The spiral striae are very regular, close, 

 and so minute that they cannot be seen without the aid of a lens ; 

 and the lines of growth are still finer. The umbilicus is much 

 smaller in proportion than in either of the preceding species. 

 Several specimens occurred. 



This species is named after Mr. Harrison, one of the gentle- 

 men who collected the shells comprised in this list. 



X Buccinum hydrophanum, n. s. PI. V. fig. 7. 



Shell oblong-ovate, very thin, smooth, somewhat glossy, of a 

 soiled purplish or livid white, with fine longitudinal lines of 



