Sowerby's Genera of Recent and Fossil Shells. 125 



succeeding portions of his work are directed to the application of those 

 larger views to the Lepidopterous Insects of Java, and to the more full 

 developement of the characters of the genera as these successively fall 

 under his notice in the Indian collection. It is by no means too much 

 to state that exotic insects have never before been so fully and correctly 

 illustrated as in the excellent figures and descriptions here given. The 

 larva, the pupa, the perfect insect, perfect also in all its parts, and in a 

 state as fine and free from mutilation as though it had only recently burst 

 into existence, afford subjects equal to the best of those which could be 

 procured in our own country, by the most assiduous collector. In every 

 respect the materials are worthy of the attention bestowed on them by 

 Dr. Horsfield, and of the talents brought forward in their display by the 

 artists whom he has employed. To such specimens alone could we have 

 been indebted for the admirable details and dissections which occupy so 

 large a portion of the plates, and render the work most valuable to the 

 scientific reader especially, furnishing to him at once the readiest means 

 of verifying the statements of the text, and of judging of the accuracy 

 of its deductions. 



On the appearance of the second part, which is now on the eve of pub- 

 lication, we shall resume our analysis, commencing with the point at 

 which the present abstract terminates. 



The Genera of Recent and Fossil Shells ; byG. B. Sowkrby, 

 F.L.S. With original Figures, by J. D. C. SowKRBy, 

 F.L.S. No. XXX. 



The four genera illustrated in the present number are Clausilia, 

 Fasciolaria, Miirex, and Triton. These names are employed with pre- 

 cisely the same signification as that assigned to them by Lamarck, and 

 require therefore no particular remark. The species figured compre- 

 hend not only some of the rarer shells of each group, but also, especially 

 in the Tritones and Murices, the most dissimilar and remarkable forms 

 comprehended in them. Each of the last mentioned genera affords am- 

 ple materials for the two interesting plates which are allotted to its illus- 

 tration. 



