260 ORGANIC REMAINS. 



peculiarity of this species is, that we never find it ending in a point, 

 but in a flattened broad edge, like that of a chisel ; as if the belem- 

 nite had terminated in an open tube, the sides of which have been 

 compressed. This idea is corroborated by the fact, that the cross 

 fracture towards this end shews no radiations, nor central line, nor 

 any marks of a sparry structure. This species, which we have never 

 seen described, may be named h. tiibularis. In this, as in No. 1, 

 the siphuncle is on one side of the alveolus: we have not seen the 

 siphuncle in the two other species. 



CRUSTACEA. 



In the class of crustaceous animals, we have but few species to 

 notice ; and all of them are of the genus cancer, or nearly allied to it. 



Fig. 7, PI. XIV, represents a rare and beautiful specimen of an 

 animal allied to the lobster, or the prawn. The folds or plates of the 

 tail are observable; but the head is mutilated. The rings on the 

 body are numerous, and each of them has a row of minute spines on 

 the front edge of it. A few similar spines are scattered on the tail part. 

 The whole is of a rich blue colour. A small brown limpet adheres 

 to the back. This fossil we foimd in a nodule in the Speeton shale. 



No. 8 is another rare and interesting fossil of this family. It 

 agrees so exactly with a large prawn, that we may consider it as one 

 of that species. It was formd near Malton, imbedded in the oolite; 

 and now belongs to the valuable collection of Thomas Hinderwell, 

 Esquire, Scarborough. 



No. 9, from the same quarter, and the same collection, is also a 

 beautiful fossil, which Ave may consider as belonging to another 

 branch of the crab family. Only half of the shell is exposed in the 

 Figure. It is of a blueish colour, and handsomely imbricated with 

 prominent scales. At the broad end, the shell is in one large piece : 



