with Descriptions of Nt w s s 1 



obliquely disposed, and with the interspac* a crossed by mic 

 revolving lines. 



"Animal light gray, equalling in length the aperture and penul- 

 timate whorl; foot short, and regularly rounded posteriorly. 



u Dimensions. — Length 1.9 in., length of aperture .»"' in., width 

 of aperture .4 in., width of body-whorl .35 in. 



'•''Locality. — Hidden under loose volcanic rooks in the bigb table 

 lands of the interior of Lower California, especially about Moleje. 

 This and its congener (C. irregularis * ial>l>) are essential!) mountain 

 species, being only found in the highesl regions. 



11 Observations. — This shell resembles U. costata Gould, as fig- 

 ured by II. and A. Adams in Gen. Recent Moll., pL 7>;, fig. 7. !• 

 diifers, however, in being more regularly tapering, and in 1 » < i 1 1 _r 

 proportionally more slender." 



It is evident from Gabb's comparison of hi- Bhell with the 

 little Barbados species C. costata* Guilding (not Gould), I 

 he did not know the latter, and was misled by tin- magnified 

 figure given by II. and A. Adams. I Gi ru ra, pi. Ixxvi.) 



Gabb remarks that C. irregularis and 0. ZV i 

 without doubt congeneric, and that an examination of the a 

 mal of the latter shows it to be a true Urocoptis, — meani 

 I presume, that in general external characters it Looked v< 

 like H. and A. Adams' figure of the animal of that gem 



From an examination of the shell -1 C. irregularis, I beli< 

 it to belong to OyUndrella, but the other Bpecies must, in my 

 opinion, as already stated, be placed in the genua E 



A study of the animal of the latt< 

 in which I was aided by my friend .„ 



Mr. W. G. Binney, enables me to give 

 the following particulars : ->>. 



Animal with highly developed 

 mantle, foot short, blunt before and 

 pointed behind, with a longitudinal J 

 groove along the centre of it- bfl 

 The dead animal, as removed entire, had 9 1" 

 living it occupied the whole Bhell with tl 



* The lingual dentition of 

 scribed by Gnppy. The ribbon is very long; i..v. 

 APRIL 6 



