G. C. Crick — On Coccoteuthis, Solenhofen. 439 



spent the winter of 1S26-7. Of the Devonian series we saw less 

 than of the other formations, but obtained some fish-remains on 

 the south-western shore of Wiide Bay. The Carboniferous system 

 is one of the most extensively developed of any in Spitzbergen, 

 and we obtained collections (mainly of Brachiopods) from various 

 localities. The Carboniferous rocks are succeeded by those of the 

 Trias, the two systems being sometimes separated by a slight un- 

 conformity. Another and greater break in the sequence occurs 

 above the Trias, for the next fossiliferous beds apparently belong 

 to the Upper Jurassic ; fossils of this age occur in several localities, 

 and they are succeeded by beds containing a species of Ancella very 

 nearly allied, if not identical, with A. concentrica, Keys. After 

 this comes another gap, including the upper part of the Cretaceous 

 (if not the whole of that system) and the Lower Tertiary. There 

 are no marine fossils later than the Aucella beds until we reach the 

 Pleistocene raised beaches, with the exception of some unsatisfactory 

 casts from beds associated with the Tertiary plant-beds. 



The sequence of faunas in Spitzbergen is instructive, but the 

 faunas themselves are thin. Species of certain classes, as of 

 Brachiopods in the Carboniferous, and of Cephalopods in the 

 Trias, may be numerous ; but the classes represented are always 

 very limited. The main lesson that the faunas teach seems to be 

 that they always lived under unfavourable conditions. We had 

 expected to find evidence of former climates not only much milder 

 than the present, but even subtropical in warmth. In this we were 

 unsuccessful ; we found, on the contrary, beds of more than one 

 period in the deposition of which ice must have taken part. We 

 found boulders weighing three tons lying in beds of comparatively 

 fine material ; and it seems difficult to see what but ice could have 

 transported them. 



The ice of Spitzbergen consists of sea-ice, valley glaciers, and an 

 ice-cap. The opportunity of the study of these three agents working 

 side by side, was one of the greatest privileges we enjoyed during 

 the expedition. 



III. — On a Specimen of Coccoteuthis hastiformis, Ruppell, sp., 



from the Lithographic Stone, Solenhofen, Bavaria. 



By G. C. Crick, F.G.S., of the British Museum (Natural History). 



(PLATE XIV.) 



THE specimen which forms the subject of the present notice 

 belongs to the genus which is termed by some authors 

 Trachyteidhis, and by others Coccoteuthis. Both names were 

 originally given to the internal shell of a Sepia-like Cephalopod ; 

 the former to examples from the Lithographic Stone (Lower 

 Kimeridgian) of Bavaria, and the latter to a specimen from the 

 Kimeridge Clay of Dorset. They are regarded as synonymous, but 

 some authors use one and some the other. 



The genus was first figured in 1755 by Knorr, 1 who mistook the 



1 " Sammlung von Merkwiirdigkeiten der Natur und Alterthiimern des Erdbodeus, 

 welehe petrificirte Korper euthalt," pt. i, pi. xxii, tig. 2. 



