CRETACEOUS FISHES. 375 
bones thicken out as they converge to the symphysis to give space for the im- 
plantation of six large lanciform teeth, which project forwards nearly in a hori- 
zontal direction ; the dentary bone immediately behind the symphysis is armed 
on its inner edge with strong laniary teeth ; the two hinder ones being on either 
side considerably larger than those that precede them; the specimen is broken 
off a short distance from the commencement of the outer row, the anterior teeth 
of which are small. 
The other specimen figured belongs to the valuable collection of Mrs. Smith ; 
and was found, as was the preceding one, in Kent. I have a portion of an upper 
jaw bone, with two teeth, from Amberley, Sussex, and have found single teeth in 
a perfect and beautiful state at Washington, Sussex ; these teeth are not hollow 
like those of the genus Hypsodon’. 
Saurocephalus striatus, R. 3. (Tab. XXXV. fig. 5. Vol. v. p. 102, Agassiz.) 
The lower jaw of this species differs from the preceding one in its more delicate 
proportions, and in the absence of the thickened symphysis: in this respect it 
has a greater resemblance to Saurodon ; all the teeth are fixed on the outer edge 
of the dentary bone ; those near the symphysis have their points directed for- 
wards, the remainder rake to the rear; they are lanciform and striated. The 
engraved specimen is from Mr. Catt’s cabinet, and was found at Southeram. 
Family Mueiuipz. 
Genus Calamogleurus?, Agassiz. 
Calamopleurus Anglicus, new, R. 4. (Tab. XXXII. fig. 12.) 
This beautiful fish, from the collection of Sir Philip Egerton, was found in 
Kent, and is the only example of the genus yet discovered in England. M. 
Agassiz named the genus from a specimen in the British Museum, procured by 
Dr. Gardener in South America, from the cretaceous formation at the Villa de 
Barra do Jardin, about fourteen leagues south of Brazil, which he called Cala- 
mopleurus cylindricus. This species is larger than the Brazilian one, being when 
1 Since this description was in type, Sir P. Egerton has obtained a specimen of Sawrocephalus 
lanciformis, showing that the premaxillary bones were prolonged into a rostrum, as in the Xiphioids. 
Tab. XXXII*. fig. 1. 
2 xaNapos calamus, meupa latus. 
3c2 
