194 R. Bullen Newton—On Steneosaurus Baroni— 
obtusely-angled quadrilateral supra-occipital, a transversely ellip- 
tical foramen magnum, and a tolerably extensive condyle, which is 
unfortunately imperfect and damaged through fracture. 
The front view exhibits a strong parietal ridge, separating two 
large temporal fosse, and having beneath a prominently arched 
pterygoidal vacuity. 
The scute is thick, deeply pitted, with an imbricating end, which 
probably proves its relationship to the ventral armour. Its dimensions 
are 5°5 by 3°5 cent. with a thickness of 1°5 cent. 
A consideration of these details proves conclusively that we are 
dealing with a reptile possessing Crocodilian affinities, and from its 
produced snout bearing a strong resemblance to the existing Gharial 
(Gavialis) of the Ganges, though differing very widely from it in 
other and more important characters. It is not till we go back 
much further in time that we find its congener among the Mesozoic 
Crocodiles forming the family of the Teleosanrides. In comparing 
_ the generic peculiarities of this group, it is ascertained that in 
Teleosaurus the teeth are directed outwards, striated near the base, 
and without the two vertical carine; it has also a triangularly 
shaped supra-occipital. Teleidosaurus possesses a broad and short 
rostrum, few teeth, three dental alveoli only to each premaxilla, and 
a small circular occipital foramen and condyle. 
In Geoffroy St. Hilaire’s genus Séeneosaurus,’ as restricted by 
Deslongchamps? and adopted at the present day by Mr. R. Lydekker,* 
we recognize characters which will include the Malagasy specimen, 
viz. the presence of a long snout furnished with numerous bi-carinated 
teeth, obliquely set; a long, narrow, mandibular symphysis; ex- 
tensive temporal fossxe; an obtusely quadrangular supra-occipital ; 
and a transversely elliptical foramen magnum. 
DESCRIPTION OF THE REMAINS.! 
The Cranial rostrum is elongate, narrow, cylindrical and undu- 
lating ; posterior end incomplete. It measures 387-5 centimetres in 
length, and graduates in width from 3:3 cent. at the preemaxillo- 
maxillary constriction to nearly 5 cent. at the fifteenth maxillary 
alveolus, with a section at the transverse fracture of 4 by 3 cent. 
A fragment in the matrix, which probably represents the posterior 
extension of the maxillary region, has a length of 19 cent., and in 
immediate proximity to this is a long, slender, curved bone, which 
appears to be the quadrato-jugal, measuring 23:5 cent. These 
dimensions added together give 80 cent., or rather more than 
23 feet as the approximate extent of the entire cranium. 
“The right maxilla has 25 alveoli, including the six posterior ones, 
1 Mémoires du Muséum, Paris, 1825, vol. xii. p. 146. 
2 Notes Paléontologiques, 1867, p. 126. 
3 Catalogue Fossil Reptilia, British Museum, 1888, parti. p. 108. 
4 The author wishes to record his indebtedness to Mr. R. Lydekker, B.A., F.G.S., 
and to Mr. A. 8. Woodward, F.G.S., for many valuable suggestions offered him 
during the preparation of this description. 
Se 
