222 BIBLIOGRAPHY. 



The bathymetrical distribution of the marine mollusca 

 has a chapter devoted to it, and much valuable specific informa- 

 tion is given on the subject. 



The distribution in time is given very fully, and a very 

 valuable table is given correlating the beds and deposits of 

 Europe and America. 



The work is profusely illustrated. The first volume in 

 addition to giving all the general considerations also furnishes 

 a classified list of the genera and hints on collecting, the twenty- 

 two plates being devoted to elucidating the structure of the 

 various groups. The second volume includes the study of the 

 Cephalopods, Pteropods, and a portion of the Gastropoda, and 

 is illustrated by sixty-nine plates showing the type species of 

 the different genera. The third and concluding volume con- 

 tains 454 pages and forty-seven plates, and is devoted to the 

 Pulmonata, Scaphopoda, and Pelecypoda, and concludes with 

 the Molluscoidea. 



The whole work is very carefully and amply illustrated, 

 the number of figures reaching 3500. The work is published 

 with coloured plates at ^6 los. ; with plain plates at ^4 os. ; 

 or in a cheaper form with plates printed both sides and bound 

 in one volume, at ^2 8s., and may be obtained of Trlibner 

 & Co., Ludgate Hill, London, or direct from the author Mr. 

 G. W. Tryon, Academy of Sciences, Philadelphia, U.S. 



J.W.T. 



Limax maximus v. Ferrussaci in County Antrim. 



— Through the kindness of Mr. S. A. Stewart of Belfast, I have 

 been favoured with a fine full-grown specimen of this variety — 

 very characteristically marked, and the first I have ever seen of 

 it. It was found in Colin Glen, County Antrim, five miles 

 from Belfast, and with it were Arion ater var. nigrescens, a very 

 young specimen, and Limax agrestis var. sylvatica, both of 

 which Mr. Stewart sent to me. — W. Denison Roebuck, Leeds, 

 June 30th, 1884. 



J.C, iv., July, 1884, 



