No. V. MOLLUSCA. 227 



epidermis is beautifully sculptured with oblique raised lines 

 or lirulse, and minutely striated in a spiral direction between 

 them ; and the raised keels are also similarly striated. The 

 central keel of the last whorl is also visible on the upper 

 ones, and is situated just above the suture. 



In the 'Annals and Mag. Nat. Hist.' for August 1877, 

 p. 136, 1 stated that the specimen upon which this species is 

 founded had been seen by Dr. Jeffreys, who considered it an 

 abnormal form of T. bicarinata. Since then, in the Sep- 

 tember part of the same periodical, he has published this 

 opinion, observing that in certain other species {Littorina 

 litorea and Fusus antiquus) ' the same kind, of distortion 

 is observable.' 



I have again most closely scrutinised this shell, and still 

 I cannot trace the slightest irregularity of groiuth, and 

 therefore I confidently adhere to my opinion, shared by 

 several conchologists, that this form is decidedly distinct 

 from the well-known bicarinata ; and it only remains for me 

 to point out its special characteristics, namely, the vast 

 differences of form and epidermis, the open umbilicus, the 

 slight prominence of the keels and the subcircular aperture. 



Trichotropis borealis, Broderip and Sowerby. 



Hob. Discovery Bay, 5 fms. ; Dumbell Harbour 

 (Feilden). 



The specimens from the above localities agree precisely 

 in shape and sculpture with that form of this species which 

 was described by Hinds from shells found at Sitka, under the 

 name of T. inermis, 



Velutina (Morvillia) zonata, var. granclis. 



Hob. Franklin Pierce Bay (Hart). 



The only specimen was taken out of the stomach of Phoca 

 barbata, and is in very bad condition. This variety is so 

 very much larger than the ordinary size of the species that it 

 almost appears that it must be distinct. It measures 21 



a 2 



