OF CONCHOLOGY. 175 



ing in the above valuable scientific service rendered by the latter, 

 and now the son has the satisfaction of repaying the obligation 

 in kind. Of course, under the restrictions imposed upon Mr. 

 Binney b}' the Governor of Massachusetts, Ave are not to expect 

 "all the improvements in classification, &c., which more recent 

 investigations have suggested," and, accepting this necessary 

 limitation, Mr. Binney may be congratulated upon having per- 

 formed his work generally in a very creditable manner. In all 

 that relates to the marine and terrestrial species it is, in every 

 respect, the most valuable as well as the most elegant volume on 

 conchology ever issued in the United States. The plate illus- 

 trations in chromo are beautifully executed by Messrs. Bowen 

 and Company, of Philadelphia, and carefully finished by hand, 

 and the very fine wood-cuts printed in the text were drawn by 

 Mr. E. S. Morse and engraved by Mr. Henry Marsh, both justly 

 celebrated for their natural history illustrations. 



We do not believe that, were Dr. Gould living, he would ap- 

 prove the views of Mr. Binney concerning the fluviatile mollusca. 

 These views we ha"ve already criticised at length upon several 

 occasions, and will not now recur to them. 



A very few copies of this elegant book, printed on tinted paper 

 and finely bound, are for sale by Little and Brown, of Boston, 

 at the very low price of Fifteen Dollars — and will doubtless find 

 quick sale. Early application should be made for them, as they 

 will surely become as scarce as the first edition in a short time. 



The following new species are described :* 



Boltenia Burkhardti, Agassiz. ^^olis pilata, Gould. 

 Lyrodus, nov. gen. [Teredidce). CalHopcea fuscata, Gould. 



Lyrodus cldorotica^ Gould. Emhletonia fuscata, Gould. 



Doris tenel/a, Agassiz. Emhletonia remigata, Gould. 



Doris diadeinata, Agassiz. Eerrnceaciniciata, Alex. Agassiz. 



Doris grisea, Stimpson. Elysia clilorotica. Agassiz. 

 Placohranchus catuhis, Agassiz. 



Annals of the Lyceum of Natural History. New York. IX. Ifo. 10. 

 April, 1870. 



On the genius PompJioJyx and its allies, with a revision of 

 the Limnceidce of authors. By Wm. H. Dall. 



A variety of P. Leana^ Adams, or possibly a new species, 

 from Clear Lake, California, is described under the name of 

 solida. Mr. Dall corrects an error in his description of the 



*Mr. A. E. Verrill, in the American Journal of Science and Arts, 

 May, 1870, states that many of the so-called new Ascidians are not en- 

 titled to specific ranli, being synonyms merely. 



