IKEDALK : STNOrSES CONTENTS BlUTISn ML'SKUM. 



295 



Jiostellan'fi, Aporrhais, and Sfruthiolaria." Tliis method is followed 

 throu^liout, simiUir notes being j^iveii about the families admitted. 

 I do not see any new names, however, but I noted a few misspellings 

 as TruneateUa, Gaderoptera, Sijphonaria, and Namnia (? for Naninu). 

 This account is signed by J. G. Children. 



The thirty-eighth (1839), thirty-ninth (1839), and fortieth (1840) 

 editions agree in detail, even the misspellings remaining unaltered. 



It is obvious that these also have no systematic value. 



In the forty-first edition there is no matter about shells, a note 

 being given on p. 53 to the following effect : — 



" Twelfth and Thirteenth Roojis. 



"The first of these Apartments, till lately, held the Collections of 

 British Birds and Hritish Shells, with a small assemblage of Birds' 

 Eggs. These have been removed, and with the general collection of 

 Birds and Shells, which filled the Thirteenth Koom, are now in 

 progress of rearrangement in the East Gallery." 



The forty-secoud edition, dated 1840, is the important one, since 

 the preliminary account, although after the manner of the preceding, 

 is somewhat more fully rewritten, and contains a few new generic 

 names with scant remarks diagnostic of them. Appended, however, 

 is a general classification, which is here reprinted. 



Wliile enga<*ed upon editing this paper, Mr. Edgar A. Smith 

 consulted another copy of the " forty-second edition " dated " 1840 ". 

 This copy, preserved in the Library of the Zoological Department at 

 the Natural History branch, differs from the one just noted in that 

 in the preliminary account whole paragraphs concerning families not 

 separated in tlie former are here inserted, whilst the classification 

 following is much amplified, many additional genera occurring, but, 

 as far as I can observe, only one new one, viz. Livonn. Two ol)vious 

 misprints were noted : p. 151, Iiin(jicla(= Ringicula), and p. 153, Papa 

 (= Pupa). The pagination of course differs, the tables occupying 

 pp. 150-6. The tables are signed at the end "John Edward Gray, 

 Nov. 4, 1840". I propose to refer to this copy in the succeeding 

 notes as 1840a. 



"The following Tables e.xhibit the series of genera of Mollusca at 

 one view " : — 



p. 146. 



Sub-kingdom : 



MOLLUSCA. 



Class I : 

 GASTEROPODA. 



Section I : 

 Ctenobranchiata. 



Order I : Zoophaga. 



Family 1 : StromhidcE. 



Strombus, 1. 

 Pteroceras, 2a-b. 



Rostellaria, 2b. 

 Terebellum, 26. 



Family 2 : Muricidcp. 



a. Eanella, 'Aa. 

 Triton, 36, 4. 

 I-'ersona, 4. 

 Apollon, 4. 



b. Murex, 4c. 

 Brontes, 4. 

 Chicoreus, 4rf, 5. 

 Typhis, 6. 



c. Pleurotonia, 7. 

 Clavatula, 7. 

 Conus, 7. 



Fusus, 8. 

 Pyrula, 8. 

 Tritonium, 8. 

 Struthiolaria, 8. 

 Aporhais, 8. 

 f?.*Lathirus. 

 Polygon a. 

 Turbineilus. 

 Cynodonta. 

 Fasciolaria. 

 Cancellaria. 



Family 3 : Biiccinidce. 



a. Cassis. 

 Cassidaria. 



VOL. X.— MARCH, 1913. 



20 



