310 
SELlCHir. 
P. 2210. Two fine spines, somewhat abraded, the exserted portion 
measuring 0*28 in length ; also three fragments; Kim- 
meridge Clay, Kimmeridge, Dorsetshire. Egerton Coll. 
25300. Greater portion of an enormous spine, the exserted portion 
originally about 0*48 in length, and the extremity exhi¬ 
biting longitudinal ribs, as in Hyhodus ; Kimmeridge Clay, 
Havre, N. Prance. Purchased , 1850. 
32547. Five fragments; Kimmeridge Clay, Vaches Noires, N. France. 
Tesson Coll. 
32771. Abraded fragment; Kimmeridge Clay, Boulogne, N. France. 
Purchased , 1857. 
P. 2211. Portion of very small spine : Portlandian, Soleure, Switzer¬ 
land. Egerton Coll. 
P. 4183. Portion of larger spine ; Portlandian, Solenre. 
Enniskillen Coll. 
(ii.) Cephalic Spine. 
32772. Imperfect exserted portion of a large cephalic spine, pro¬ 
bably of this species ; Kimmeridge Clay, Boulogne. 
Purchased, 1857. 
(iii.) Dentition. 
41378. A large portion of the dentition of the (? upper) jaw, de¬ 
scribed by Owen (loc. cit.) under the name of S. meclius, 
and shown, of one third the natural size, in the accom¬ 
panying woodcut, fig. 11 ; Great Oolite, Caen, Normandy. 
Purchased, 1869. 
Fig. 11. 
Dentition of Asteracanthus ornatissimus (Strophodus medius, Owen).— 
Great Oolite, Caen. One third nat. size. (No! 41378.) 
