442 PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 7, 



3. Note on a Fragment of a Teleosatteian Snout from Kimmekidgb 

 Bay, Doeset. By J. W. Hulke, Esq., F.R.S., F.G.S. 

 [Plate XVIIL] 

 This piece of a Teleosaurian snout, which fell last winter from the 

 cliff in Kimmeridge Bay, and was lately entrusted to me by J. C. 

 Mansel, Esq., F.G.S., seems to me worthy of a short notice, as it is 

 the first indication of this genus which, within Mr. Mansel's know- 

 ledge, has been discovered at Kimmeridge ; and I do not find in the 

 British Museuin any Teleosaurian fossils from this locality, nor are 

 any mentioned in Mr. Seeley's recent catalogue of the fossil BeptUia 

 in theWoodwardian Museum, although in both these collections there 

 are Teleosaurian remains from other Kimmeridge-clay localities. 



The fragment, 17 inches long, represents a very long and slender 

 snout tapering gradually and slightly (its breadth decreases only 

 0*5 in. through a distance of 15-5 in.) to behind the external nos- 

 tril, where the praemaxillse suddenly and largely expand. The 

 nostril, wholly inclosed in these bones, is dilated, strictly terminal, 

 and directed obliquely forwards ; its lower margin is interrupted by 

 a prominent median tubercle formed of the swollen praemaxillary 

 suture ; and a shallow convex lobe projects from the middle of the 

 upper margin. The prasmaxillee ascend 2-5 in. above the nostril, 

 and end in an acute point, the maxillse composing all the remainder 

 of the fragment. The upper surface of the snout is convex trans- 

 versely, more so in front than posterioi'ly, where it becomes de- 

 pressed ; but its transverse section nowhere approaches the semi- 

 circular form of the stouter-snouted Steneosaurus Manselii, which I 

 described last session. The lateral margins are slightly crenated by 

 the prominent alveoli of the sixteen foremost maxillary teeth, the 

 openings of which slant outwards and downwards, while the hinder 

 ones look directly downwards. The palatal surface between the 

 alveoli is convex transversely in front, and it becomes gradually 

 flatter posteriorly. Throughout its whole length it descends below 

 the level of the alveoli. No trace of the front ends of the palate- 

 bones are discernible. 



Most of the teeth have fallen out ; but a few, broken short off, re- 

 main in the sockets. The transverse section of the best-preserved of 

 these teeth, at the neck, is nearly circular. Each prsemaxilla contains 

 five alveoli ; judged of by the size of these, the third and fourth teeth 

 were larger than the others, and the first and fifth were the smallest. 

 Each maxilla in the space of 15-5 in. has a series of twenty-five 

 alveoli, of which the three front ones are smaller than the others. 



The dilatation of the terminal nostril is much greater than in any 

 other Teleosaurus known to me. I believe the fossil represents a 

 new species, and I propose for it the specific designation megarhinus. 



EXPLAJVATIOJSr OF PLATE XVIII. 

 .Fig. 1. Snout of Teleosaurus megarhinus from Kimmeridge, seen from beneath, 

 reduced. 

 2. The same, from above. 

 ~ 3. The same, from the left side. 



