ling the contour Mini general I im-ln 



mth. 

 nia, Hi i' .'ill.: 



x inn fn'l i \\ n ; '/'. 



/'/, A Ad. from Japan . , Midd., v:ir. 



<>!' Aurivillius (tig. V,)). 



r \\ OLATHBATA, A. Ad. I'l. 7, lig. - r 1 . 



Umbilicus narrow, whorls angular, carinated above, cancel- 

 lated with slightly beaded spiral ribs ;md inters! it i:d regular, 

 small, longitudinal riblels; epidermis thin, yellowish In-own. 



\land. 



T. innnmtfi, Hutton, is a synonym. I have not seen this 

 species, which so greatly resembles T. borealiv, but is from an 

 entirely dillerent locality. The figure shows no trace of hairs 

 on the epidermis. 



T. CANCELLATA, Iliiuls. PL 7, figs. 49, f)0. 



Uinliilicus small, whorls nbout 7, well rounded, with elevated 

 spire, with n niiinlier of spiral ribs, obsoletely cancellated here 

 and there- by distant longitudinal and less prominent ribs; epi- 

 dermis light brownish or grayish; aperlure often pink. 



Length, 1-1-4 inches. 



Ahifikn to Vancouri'r** T.<lnn<L 



Appears to be ])eculiar to the v. -t of Xorth Amci 



where it replaces T. hon'nlix. Jetfreys considers it identical 

 with that <;pecic<, .and as Arctic mollusca are exceedingly vai'ia- 

 lle, this may be so; yi't I find no conclusive evidence of it. T. 

 "In, Hinds (tig. 50), belongs here, 



T. CORONATA, Gould. PI. 7, figs. 53, 54. 



Umbilicus r.ither wide and deep, acutely margined : whorls 

 about ('., tabulate and carinate at the angle; epidermis ash- 

 colored, tibrously produced at the angle. Length, :>."> mill. 

 S/s. of I wan ; l'> 



The first figure given above is supposed by Krau--, who 

 publishes it, to represent the species, but it does not appear to 

 me ' with the description. (Jould never figure. I it. I 



have added a figure given by Aurivillius, which is probably n 

 better representation of it, and ap. T. mticfirinata. 



