ichthyosattridjr. 63 



Specifically Undetermined Specimens prom the Lias. 



Of the undetermined skulls the majority appear to belong either to 

 I. communis or to I. intermedins, the presumption being that 

 the larger number of those from Lyme-Regis are referable to the 

 former, and those from Street to the latter species. Some may, 

 however, possibly belong to the next group. The bones of the 

 limbs are all referable to the present group. 



2026* . Slab showing a quadrate, vertebrae, ribs, interclavicle, 

 {Fig.) scapula, humerus, femur, and detached bones of the 

 pectoral limb ; probably from the Lower Lias of Street, 

 Somersetshire. Figured by Hawkins in his ' Memoirs on 

 Ichthyosauri &c.' pi. xii. It is highly probable that 

 this specimen belongs to /. intermedins. 



Hawlcins Collection. Purchased, 1834. 



2002 *. Slab showing the left lateral aspect of the imperfect anterior 

 {Fig.) portion of a skeleton ; from the Lower Lias of Street. 

 The skull has lost the extremity of the rostrum, and is 

 otherwise somewhat damaged ; it exhibits the sclerotic 

 bones and the preorbital vacuity, and has moderately 

 large teeth. The first fifteen vertebras and several of the 

 ribs are preserved in an imperfect condition. Part of the 

 pectoral girdle, together with the dorsal aspect of the left 

 humerus, radius, and ulna, are also shown. Hawkins 

 refers this specimen to /. communis (chiropolyostinus), 

 and figures it in pi. ix. of his ' Sea Dragons.' 



Hawlcins Collection. 



2006 *. Slab showing the rostrum of the skull, together with a scapula, 

 {Fig.) an imperfect coracoid, and a humerus ; from Street. 

 Figured by Hawkins in his ' Memoirs on Ichthyosauri &c.' 

 pi. x. ; the figure indicating that the specimen was less 

 imperfect than at present. The relatively large size of 

 the teeth indicates the probability of this specimen be- 

 longing to /. communis. Hawlcins Collection. 



41160. Slab showing the left lateral aspect of the skull, and the 

 left scapula and pectoral limb of a very young individual ; 

 from Lyme-llegi8. The limb has seven longitudinal rows 

 of phalangeals, and shows all the characters of /. commwnis. 



Purchased, 1868. 



R. 1075. Slab showing the left side of the rostrum of a skull, 

 together with detached vertebral centra and other bones ; 



