Catalogue of Fossil Cephalopoda. 



281 



satisfactory to learn that, with the exception of the delay in 

 delivery, the Catalogue itself has not suffered loss, Mr. Crick 

 remaining on the spot and carrying on the work after Dr. Foord's 

 departure with loyal good-will ; and now by their joint labours we 

 have Volume III of this useful Catalogue delivered bound in its 

 customary cloth covering. 



/ t 



Fig. 1. — a, Gephyroceras intumescens, Beyr. ; lateral view of a natural cast, from 

 the Upper Devonian, Frasaes, Belgium ; half nat. size, b, peripheral view of same 

 specimen, c, suture-line of same, d, Tornoceras simplex, Von Buch ; lateral view 

 of a natm-al cast, from the Upper Devonian, Budesheim, Eifel ; nat. size. 

 e, peripheral view of same. /,• suture-line of same species. (Fig. 25, p. 69, op. cit.) 



Writing six years ago, Dr. Foord observed, in the Introduction 

 to Part II, p. xvii, that in an earlier published Table of the 

 Nautiloidea he had inserted the family Bactritidas : but on re- 

 considering the question of the affinities of Bactrites (the sole 

 representative of the family) in the light of the investigations of 

 Branco and Hyatt, he was now prepared to accept the systematic 

 position assigned to it by those authors — that is, at the commence- 

 ment of the Ammonoidea. Bactrites, therefore, forms the subject 

 of the opening chapter of Part III. Here under the genus 

 Bactrites Dr. Foord gives us a summary of Hyatt's and Branco's 

 investigations, and reproduces a series of interesting figures by 

 Branco and others of the initial chambers of Nautilus pompilius 

 (fig. 1, a, b, c, p. 41) ; of Orthoceras elegans (d) ; of Cyrtoceras 

 cornu (e) ; of Cosmoceras ornatiim (f, g, h) ; of Belemnites 

 Wiirttembergicus (i) ; of Bactrites Jlyattii'? (k) ; of Bactrites 

 gracilis (I and m) ; of Goniatites compressus (n) ; and of Spirula 

 Peronii (o). 



After describing the initial chamber of Bactrites, of Nautiloids, 

 Ammonites, Goniatites, Belemnites, and Spirulids, he points out 

 that the shape of the initial chamber in Bactrites differs widely from 

 that of the Nautilids, but agrees with that of Goniatites compressus. 



