6 Notes on certain Terrestrial Mollusoa^ 



differs, however, in being more regularly tapering, and in being 

 proj)ortionally more slender." 



It is evident from Gabb's comparison of his shell with the 

 little Barbados species C. costata^^ Guilding (not Gould), that 

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

 figure given by H. and A. Adams. (Genera^ pi. Ixxvi.) 



Gabb remarks that C. irregularis and C. Newcomhiana are 

 without doubt congeneric, and that an examination of the ani- 

 mal of the latter shows it to be a true Urocojdis^ — meaning, 

 I presume, that in general external characters it looked very 

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



From an examination of the shell of C. irregularis^ I believe 

 it to belong to Cylindrella^ but the other species must, in my 

 opinion, as already stated, be placed in the genus Eucalodium, 



A study of the animal of the latter, in which I was aided by 

 my friend Mr. AV. G. Binney, enables me to give the follow- 

 ing particulars : 



Animal with highly developed numtle, foot short, blunt be- 

 fore and pointed behind, with a 



i-KJ. 3. ^ ^ ' 



longitudinal groove along the cen- 



tre of its base. The dead animal, as 

 removed entire, had 9-10 volutions ; 

 when living it occupied the whole 

 sliell with the exception of the last, 

 Jaw and k-eth of E. Nowcuiubiamiiu, aud pcrluips tlic a])icial, wliorl. Jaw 



(fig. 8) arcuate, with a slight median 

 projection, distinctly, longitudinally costate, the costse, 9-10 in 

 number, flattened, their terminations scarcely produced at the 

 anterior or cutting margin, parallel with which are a few fine 

 striae. 



In the jaw of the second specimen examined, the number of 

 costae w\as found to be 13, and the cutting margin very per- 

 ceptibly crenulated by their extension. 



i 

 I 



* The lingual dentition of C. costata is very similar to that of C. Trinitaria as de- 

 scribed by Guppy, The ribbon is very long, having 180 rows of teeth. 



