20 FOSSIL REPTILES OF DORSET. 



extensive range in Great Britain, having been found in the Lias 

 beds of Stratf ord-on-Avon ; the neighbourhood of Bristol ; Barrow- 

 on-Stour, Leicestershire ; Street, Somersetshire ; and Whitby, 

 Yorkshire. There is one in the County Museum from the Lower 

 Lias of Lyme Regis. 



ICHTHYOSAURUS ENTHEKIODON, Hulke. 



Provisionally named by Mr. Hulke in 1869 from the fragments 

 of a long and slender snout and teeth from the Kimmeridge Clay, 

 Kimmeridge ; confirmed the year following by my eminent friend 

 from another and more perfect specimen we found on one of the 

 ledges in Kimmeridge Bay. The roots of the smooth and 

 slender teeth are surrounded by a thick bulb of cement ; the length 

 of the head 23 '5 inches, orbits large, furnished with a sclerotic 

 ring; fifty-six vertebrae in an unbroken series; the paddles 

 extremely small ; a few only of the phalangal bones were preserved ; 

 humerus 2 '7 inches long; femur 2 inches; the distal end to 

 which the tarsal and phalangal bones were attached, 1.1 inch 

 broad. The snout not so long relatively as that of Ich. longirostris, 

 from which it also differs in the shape of the coracoids, and the 

 smooth tooth-root. It resembles Ich. tenuirostris in the pre- 

 ponderance of the fore-paddles over the hind. Presented by me to 

 the British Museum. 



ICHTHYOSAURUS incert., Hulke. 



The skull of an Ichthyosaur, with some accompanying teeth, 

 which I found in the Kimmeridge Clays, of Kimmeridge, and 

 submitted to Mr. Hulke, were too fragmentary to enable him 

 to give it a specific name. The snout when perfect could not have 

 been less than three feet long. The crowns of the teeth are finely 

 striated and bluntly pointed, the lower compressed portion being 

 without the usual dividing belt ; their larger size separates it from 

 the slender-snouted Liassic group ; and from Ich. communis -and 

 Ich. enthekiodon in their swollen tooth-roots. 



One of the cases in the Geological Department of the British 

 Museum, Cromwell Road, contains a few vertebras of the two 



