PYRULA. 



TESTA tenuis, oblonga, superii^ ventricosa, 

 extremitate inferiore siibattenuata: spira bre- 

 vissima; apertura elongata mediane latiore, in 

 canalem brevem, latum, producta. [^Varices 

 nulli,^ Labium externum acutum, minutissime 

 crenulatum, interne leviter incrassatum. La- 

 bium internum tenuissimum, expansum. Um- 

 bilicus nullus. 



This Genus forms a part of the Liniiean Sulla, than 

 which nothing covild be less scientific. Bruguiere united 

 it to his Ftisus, with which^ indeed, it is much more pro- 

 perly associated. We think Lamarck has scarcely im- 

 proved upon Bruguiere, in dissevering the true Pyrulce 

 from the Fusi, because he has united to them many others 

 that ought to have remained where Bruguiere left them. 

 Upon the whole, it does not appear to us that Lamarck 

 has shown his usual skill in ascertaining the characters 

 that distinguish Fusus, Fasciolaria, Pyrula, and Turbinellus; 

 but, on the contrary, he has involved these genera in 

 almost inextricable confusion. In endeavouring to define 

 each Genus, it may perhaps be necessary to throw out 

 from them some shells which may constitute two or three 

 new genera, but we will do this with the utmost caution, 

 and in no instance when we can possibly avoid it. 



The shells which, alone, in our opinion, ought to 

 form the Genus Pyrula, are oblong, rather thin, and 

 generally, more or less strongly cancellated on the out- 

 side; they have a thin epidermis which is scarcely ever 

 sufficiently adhesive to remain on the shells when brought 



