62 ICHTHYOPTERYGIA. 



Ichthyosaurus, sp. 



The following specimens appear to come nearest to /. intermedins, 

 but the anterior margin of the first row of phalangeals in the pectoral 

 limb is entire. 



Hob. Europe (England). 



R. 1118. Slab exhibiting the right lateral aspect of the imperfect 

 skeleton of a comparatively small individual ; probably 

 from the Lower Lias of Lyme-Regis, Dorsetshire. All the 

 vertebral column is preserved, but the centra in the 

 caudal region are displaced. The skull appears to have 

 been comparatively short, but its component bones are 

 separated; the teeth are slender. The bones of the 

 pectoral girdle are in much confusion • but the ventral 

 aspect of the left pectoral limb is well displayed. There 

 are five longitudinal rows of phalangeals in the middle of 

 this paddle. The two femora are preserved. No history. 



R. 588. Slab exhibiting the ventral aspect of a right pectoral limb, 

 agreeing very closely with that of the preceding specimen ; 

 from Lyme-Regis. This specimen is peculiar in having 

 only three bones in the third row from the humerus. 



Purchased, 1885. 



33277. Slab exhibiting the left lateral aspect of a small skeleton, 

 apparently agreeing very closely with No. R. 1118 ; from 

 Lyme-Regis. The rostral region of the skull is finely 

 preserved, and there are parts of the vertebral column 

 and many of the ribs. The ventral aspect of the right 

 humerus and radius is also shown. Purchased, 1858. 



Ichthyosaurus, sp. 



The following specimen is characterized by the elongated skull, 

 excessive flatness of the terminal faces of the vertebral centra, and 

 the elongation of the coracoid. It may indicate a distinct species. 



Hob. Europe (England). 



30877. Slab showing the left lateral aspect of the skull and 

 anterior portion of the thoracic region of a young indi- 

 vidual ; from the Lower Lias of Lyme-Regis, Dorsetshire. 

 The nearly entire left pectoral paddle is preserved, and is 

 of relatively small size ; its length being less than one 

 third of that of the skull. Purchased. About 1853. 



