Lamarck's Genera of Shells. 259 



feminine. Planaxis and argonauta, which are made feminine, 

 should be masculine; as should alto triton, which is made a neuter 

 noun. Other similar oversights may be found, but our limits will 

 not allow us to extend the list, even if we were so inclined ; and, 

 after all, the faults are so overbalanced by the merits, that, non 

 paucis offendemur maculis. We once more thank M. de Lamarck 

 for the treasure he has given to the world, and heartily bid him 

 farewell. 



P. S.— It will be seen by the list of plates, that, in the last we 

 have given the figures of most of these shells, of which we were not 

 able to obtain drawings at an earlier period. Except clymene, to 

 which Lamarck gives no reference but the manuscript memoirs of 

 M. Savigny, we believe every genus is now illustrated by an ap- 

 propriate figure. We have also given a second figure of planaxis 

 sulcatus, and another of carocolla acutissima, from more charac- 

 teristic specimens than those from which our former drawings were 

 taken. The figure of the limacina helicialis is from a specimen 

 brought to England by Captain Sabine, who accompanied Captain 

 Ross on his expedition to the Arctic Regions. It perfectly an- 

 swers Lamarck's description of that shell, and also the figure re- 

 ferred to by Otho Fabricius, in his Fauna GrSenlandica, which may 

 be found in Adelung's Geschichte der Schiffahrten, or History of 

 Voyages to discover a north-east passage to Japan and China, 

 Halle, 1768. PI. xvii. Fig. 12. 



The following is Mr. Sowerby's specific character of the galeolaria 

 decumbens, (Fig. viii. * * *.) « Testa repente, teretiuscula, dorso 

 obtuse angulato, sulcato, aperturae lingula breviuscula." We have 

 not been able to obtain either of the two species described by La- 

 marck, if, indeed, they be really different from the G. decumbens, 

 of Sowerby. Lamarck gives no reference to any figure for either 

 of his species. 



Fig. xii.* is creusia spinulosa ; that described at p. 76, vol. xiv. 

 C. stromia, we have not met with ; we, therefore, add the specific 

 character of C. spinulosa. 



Shell turbinated, convex, with four sutures ; furrows very small, 

 radiating, spinous. 



S 2 



