LIST OF AUTHORS REFERRED TO. 



The following enumeration of works is chiefly intended to explain the abbrevia- 

 tions used in connection with the preceding list of families, and as the works most 

 accessible to students generally have been used, whenever they could be referred 

 to in explanation of the limits of families adopted, titles of the most elaborate and 

 valuable monographs and catalogues of families and other groups have been entirely 

 omitted, although the compiler has been fortunate enough to be enabled to make 

 use of them. Special monographs have only been referred to when the groups in 

 connection with which they are cited have not been limited in the same manner in 

 general works. 



In order, however, to facilitate the use of the list, as well as reference to the 

 series in question, Mr. Lovell Reeve's " Conchologia iconica" has been catalogued, 

 and all the monographs hitherto published enumerated, with references to the 

 families to which the respective genera belong in the present system. 



For the information of students, and because it is information often desired, the 

 publishers' prices of most of the works cited are given, in the currency of the 

 country where they were published. Many of the separate monographs reprinted 

 from journals can be obtained from the second-hand book dealers especially the 

 German and from the Naturalists' Agency of Salem, Mass., but at varying prices. 



In order to secure uniformity of typography, only the initial letters of the charac- 

 teristic words are capital, the example of the learned brothers Grimm, as well as 

 other German writers, sanctioning such usage for their language. The punctuation 

 of the respective title-pages is adopted. 



ADAMS (Henry and Arthur). The genera of recent Mollusca; arranged ac- 

 cording to their organization. .... In three volumes. .... Vol. I. [-] III. 

 London : John Van Voorst, .... 1858. [8vo., V. I, 484 pp.; V. II, 2 p. 1. 

 661 pp. ; Atlas, 3 p. 1. 138 pi. w. 138 1. opposite. Published in 36 parts, 1st 

 Jan. 1853 1st Nov. 1858, at 2 sh. 6 d., plain ; 5 sh., animals colored, per part.] 



ALBBRS (Johann Christian). Die Heliceen nach natiirlicher verwandtschaft 

 systematise!! geordnet von Joh. Christ. Albers, .... Zweite ausgabe nach 

 dem hinterlassenen manuskript besorgt von Eduard von Martens. Leip- 

 zig, Verlag von Wilhelm Engelmann. 1860. [8vo., xviii. 359pp. 3 th. 7^ngr.J 



ALDER (Joshua) and Albany HANCOCK. A monograph of the British 

 Nuclibranchiate mollusca : with figures of all the species. .... London : 

 Printed for the Ray Society, 1845. [Imp. 4to., 5 p. 1. 54 pp. 138 1., xl pp. 1 1., 

 83 pi. Published in parts, 1845-55. ] 



[The arrangement of the Nudibranchiata is mostly adopted from Alder and 

 Hancock (op. cit. pp. xiv. xxiv.). In place, however, of the single family 



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