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' CESTRACIOXl'IDiE. 337 
19830. Imperfect spine; Lower Chalk, Dover. Purchased , 1846. 
J 47921. Short broad spine; Chalk, Maidstone. 
Presented by the Hon. Robert Mar sham , 1877. 
/ P. 325. Three fragments; Chalk, Hart Hill, Charing, Kent. 
Harris Coll. 
49736. Imperfect large spine, with four vertebrae ; Upper Chalk, 
Guildford. Capron Coll. 
v 4041, 4080, 4084-5, 4103. Live examples described and figured by 
Agassiz, Poiss. Loss. vol. iii. (1837), p. 62, pi. x.b. figs. 8, 
10-14, under the name of Bpinax major ; Upper Chalk, 
Lewes. Mantell Coll. 
P. 1294. Nearly complete arched spine; Chalk, Sussex. 
Egerton Coll. 
48949. Small narrow spine, incomplete; U. Chalk, Norwich. 
Bayfield Coll. 
48949 a. Narrow spine, not much curved, worn or broken at the 
extremity ; Upper Chalk, Norwich. Bayfield Coll. 
P. 4921. Large much-curved spine, associated with a series of thirty 
vertebrae; Chalk, Sussex. Purchased, 1885. 
Similar dorsal fin-spines have also been described and figured 
from the Cretaceous of Saxony (H. B. Geinitz, Charact. Schicht. 
u. Petrefakt. Sachs. Kreidegeb., Nachtr. 1843, p. 5, pi. iv. fig. 4 ; 
also Palaeontogr. vol. xx. pt. ii. p. 211, pi. xl. figs. 36-38); but 
the so-called Bpinax margincitus and B. rotundatus, A. E. Keuss 
(Yerstein. bohm. Kreideform. pt. i. 1845, p. 8, pi. iv. figs. 10, 11, 
13, 14), from the Turonian of Bohemia, are Teleostean teeth. 5’. /Y7 - ~ 
The following imperfect series of vertebrae may also perhaps be 
referable to Bynechoclus or Cestracion :— 
4110. Series of about forty much-broken vertebrae, referred to Bpinax 
major by Agassiz, tom. cit. pi. xl. a. fig. 6 ; Chalk, Lewes. 
Mantell Coll. jC '^ L ^ t ^ “ ' 
38114. Chain of small vertebrae, with traces of cartilage and sha¬ 
green ; Lower Chalk, Dover. Purchased, 1864. 
y 49079. Series of much larger broken vertebrae, with remains of the 
head, pectoral arch, and pelvic arch, with claspers ; Lower 
Chalk, Dover. Gardner Coll. 
/P. 4326. Short chain of vertebrae; Lower Chalk, Kent. 
EnnisJcillen Coll. 
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