ODOSTOMIA. 167 



been obscure or local, instead of cosmopolitan, I should 

 have hesitated at adopting the name in preference to 

 one subsequently proposed by some naturalist of 

 equal reputation, but which was in general use. It is 

 true that the restoration of ancient names, however ac- 

 credited, may for a time cause some inconvenience, and 

 oblige many to go to school again ; but is not the latter 

 a condition of scientific and even intellectual existence ? 

 Let us, therefore, not be too indolent, nor too selfish. 

 Posterity has its claims ; and I write (as every one does 

 on a subject of natural history) not only for this gene- 

 ration, but for all those to succeed it. After Linne, 

 this species was (although loosely) described and figured 

 by Pennant as Turbo albus, by Donovan as T. acutus, 

 by Adams as T. subarcuatus, by Montagu as T. elegan- 

 tissimus, by Scacchi as Rissoa turrit ell a, and by Philippi 

 as Melania Campanella. Risso misquoted Montagu in 

 describing his Eulima elegantissima, which appears to 

 be our E.polita. A specimen having the ribs some- 

 what more oblique than usual was described by Leach 

 as Cerithium Spencerianum. 



31. O. PUSIL'LA* (Philippi.) fe\7t 



Chemnitzia pusilla, Phil. Moll. Sic. ii. p. 224, t. xxviii. f. 21. 



BODY differing from that of 0. lactea in the following parti- 

 culars : the snout has a palish purple streak on either side ; 

 each of the tentacles is marked with a similar streak ; when 

 spread, they have the lateral membranes united almost to the 

 tips, which are minute and acutely pointed, so that the ten- 

 tacles then appear like a single united leaf; the foot is much 

 longer, extending on the march to the last whorl but two, and 

 terminating in almost a needle-point ; whilst in the other 

 species, under the same circumstances, it is quite rounded, and 

 does not reach beyond the last or body-whorl. (Clark and 

 Bretherton.) 



* Little. 



