Eevieics — G. C. Cncl: — Muscular Scars of Cqyhalopoda. 519 

 s, E a;^ X IB "W S. 



I. — LiSt of the Types and Figured Specimens of Fossil 

 Cephalopoda in the British Musegm (Natural History). 

 By G. C. Crick, F.G.S., etc. 8vo ; pp. 103. (London, 1898 ; 

 printed by order of the Trustees of the Museum.) 



THE great utility to specialists of such lists as this cannot be 

 overestimated, and we are glad to be able to call favourable 

 attention to the latest of an increasing series. It is to be hoped that 

 the Museums Association will use their best endeavours to persuade 

 the various institutions repi'esented amongst their members to respond 

 to the invitation of the British Association and proclaim their 

 treasures in like manner, as indeed some of them both have done 

 and are doing. 



The object of the present list is to place permanently on record all 

 the types and figured specimens, both British and foreign, of Fossil 

 Cephalopoda preserved in the Geological Department of the British 

 Museum. 



Each specimen is entered under the name given to it when it was 

 first figured or described, any names subsequently applied being 

 appended in chronological order; whilst cross references are given 

 from these last in the alphabetical order in which the whole is 

 arranged. Each name is followed by an abbreviated reference to 

 the work in which, it occurs ; while the formation and locality of 

 the specimen, with its registered number in the collection, are 

 given at the close of every main entry. 



We are heartily glad to observe that corresponding lists of other 

 groups of Invertebrata in the Museum are to follow ; and though for 

 the present the student is referred to the catalogues already published 

 for the Vertebrata, it is to be hoped that the Trustees will ultimately 

 see their way to issuing similar lists of these also, since much 

 valuable time is wasted in hunting for the record of some desired 

 type in a voluminous catalogue, where it has to be sought in its 

 systematic position and possibly under some other name than the one 

 it bore when described. 



In the production of the present list full measure of praise must 

 be awarded to all concerned in its production : even the printer 

 appears at his best. 



II. — On the Muscular Attachment of the Animal to its Shell 



in some Fossil Cephalopoda (Ammonoidea). By G. C. Crick, 



F.G.S., F.Z.S., etc. (Trans. Linn. Soc. London, ser. ii, vol. vii, 



pt. 4, pp. 71-113, pis. xvii-xx.) 



r|"^HE true relationship of the Ammonoidea to other Cephalopoda 



X has long been a moot question, and there have not been 



wanting those, and that quite recently, who, fascinated by the 



external resemblance of some ammonite shells to that of Argonavta, 



have advocated the placing of the ammonite with the Dibranchiata. 



The interesting discovery by Mr. Crick, however, of the impression 



of the shell muscles and anuulus proves the permanent attachment 



of the Ammouoid animal to its shell, and consequently its wide 



