386 CRETACEOUS REPTILES. 
in my ‘ Report on British Fossil Reptiles,’ published in the volume of ‘ Reports 
of the British Association’ for 1841, p. 145, I proposed the name of Raphio- 
saurus* for a genus of small extinct lacertine Sawria, characterized by slender 
awl-shaped teeth, attached by anchylosis in a single series to the bottom of a 
shallow alveolar groove, and to the inner side of an outer wall or parapet of the 
same groove; thus corresponding with that type of saurian dentition called 
‘pleurodont’’ amongst modern Lizards fF. 
The specimen figured in Pl. XXXIX. figs. 1, 2 & 3, was discovered in the 
lower chalk near Cambridge; it consists of a considerable portion of the 
dentary part of the lower jaw, and contains twenty-two of the above-described 
teeth, arranged in a close series: a, fig. 3, is a tooth in place; b, a tooth with 
the crown broken off; and c, the groove or incomplete socket of a shed tooth. 
At the period when this fossil was described}, the only vertebre of a lacertine 
Saurian, which at all approximated to the proportions of the species indicated by 
the jaw and teeth of the Raphiosaurus, were those which Sir Philip de M. Grey 
Egerton had kindly submitted to my inspection, and which are figured in the 
volume of the Geological Society’s Transactions already cited. That chain of 
vertebrae was discovered in the lower chalk of Kent, and manifested specific 
distinctions from the vertebre of the existing genera of Lacertians with which 
I was able to compare them in 1840; and at that time I could only suggest, 
when pressed for a closer determination, that, on the hypothesis of their having 
belonged to the same species as the fossil Lacertian from the Cambridge chalk, 
they must be referred to a Lizard generically distinct from any known existing 
species. Other specimens with which Mr. Dixon afterwards supplied me, have 
rendered it highly probable that the vertebre (figured in Pl. XXXIX. fig. 4) 
belonged to an extinct Lizard, distinct from the Cambridge Raphiosaurus Lucius, 
with the vertebral characters of which species we are still, therefore, unac 
quainted. 
Genus ConiIASAURUS. 
Species. Coniasaurus crassidens. (Tab. XXXVII. figs. 18, 19, 19a & 20.) 
Two genera of Lizards of the cretaceous period, with procelian cup-and-ball 
vertebrz, similar in size and form to those of the series figured and described in 
the ‘ Geological Transactions§,’ are now no longer hypothetical, but have been 
* From pagloy an awl, cavpos a lizard. + Odontography, 4to, p. 182, 
t Transactions of the Geological Society, 2nd Series, vol. vi. p. 412, pl. 39. fig. 3. 
§ Ib. p. 413. 
