62 



says : — Shell higher than broad, marked with narrow, 

 uniform longitudinal ribs, crossed by delicate imbricated 

 striae, suture dilated into a thin, prominent, undulated 

 fringe, plaited into large and regular folds ; shell about one 

 and a quarter inches broad, and one inch high, of a uniform 

 fibrous white or bright fawn color, destitute, like the other 

 species of this grouj), of any bright colors or distinct 

 markings. The transverse strise on the upper surface are 

 slender, very irregular, or rather undulated, imbricated by 

 lines of growth, which are very near each other ; equally 

 irregular are the striae on the under surface of the body 

 whorl occupied by the fringe, but the centre ones are 5 or 6 

 in number, regular and concentric ; umbilicus concave, but 

 quite closed ; the plaitings of the sutural fringe only half as 

 many as the longitudinal ridges. 



With this genus must be associated Carinidce aurea^ 

 Jonas, who places the species in Oken's genus of Labio. 

 Messrs. Adams place the same shell in Eisso's genus Bolma. 

 It cannot be Lahio, which has a tubercle on the columella, 

 while the general habit is that of our TrocliococMea. Neither 

 can it be placed with Bolma, whose type is Trochus rugosuSy 

 Linn,* and whose whorls are rounded, and the inner lip with 

 a thick callosity. The proper position is surely with G. fim- 

 hriata, where Swainson placed it, and where he figured and 

 described it anew under the name of C. granulata (loc. cit). 



Astele is a genus erected by Swainson as remarked in my 

 " Census," and. for which A. Adams subsequently proposed 

 the name of Eutrochtis. It is a conical trochus with a wide 

 perspective umbilicus. Sub-family Liotiance. Operculum 

 horny, with an external calcareous coat, formed of separate 

 pearl-like shelly particles, placed in spiral lines ; shell more 

 or less discoidal, whorls sulcate or cancellate, aperture 

 orbicular, scarcely pearly within. 



LiOTiA is a genus proposed by Gray, with the characters 

 of the sub-family, but the whorls are never spiny, and have 

 an expanded entire border round the mouth. The division 

 is an exceedingly good one, but I think that in the young 

 states some which rightly belong to it have been included in 

 Cyclostrema, and this may apply to some of the species 

 described by me. Mr. Petterd writes to me to say that he 

 thinks that my Liotia incerta (see Proc. 1876) is an unde- 

 veloped form of Carinidea Tasmanica.f I have not b^en 

 able to examine the type specimen, which, however, Mr. 



*See Eisso Hist. Nat dea principales produc de 1' Europe, merid. Paris* 

 1826, 4 vols., Chiaje's Poli, 3 pi. 52, fig. 45. 

 t Which I now regard as the young of C. aurea. 



