40 ICRTHYOPTEEYGIA. 



43298. An imperfect left scapula ; from the Kimeridge Clay of 



Weymouth. Purchased, 1871. 



43299. An imperfect right scapula ; from the Kimeridge Clay of 



"Weymouth. Purchased, 1871. 



44181. A crushed scapula • from the Kimeridge Clay of Wey- 

 mouth. Purchased, 1873. 



43297. An entire right scapula ; from the Kimeridge Clay of 

 Weymouth. The strong ridge on the anterior border of 

 the dorsal aspect of the proximal extremity is beautifully 

 shown. Purchased, 1871. 



46472. The glenoidal extremities of the two scapulae of a very large 

 individual; from the Kimeridge Clay of Broughton-Gifford, 

 Wiltshire. Cunnington Collection. Purchased, 1875. 



32706. The glenoidal extremity of a right scapula, agreeing in size 

 with the preceding ; from the Oxford Clay of Yaches 

 Noires (Calvados), France. The contour somewhat 

 resembles that of the scapula of I. zetlandicus, ~No. 32671 

 (p. 81). Tesson Collection. 



b. Typical Subgroup. 



The roots of the teeth without an envelope of cement, and marked 

 by larger and more numerous nutings than those of the crowns 

 (fig. 19). Coracoid with posterior notch (fig. 4). Scapula with 



Fig. 17. 



Ichthyosaurus (cf.) communis. — Dorsal and distal aspects of the left humerus ; 

 from the Lower Lias of Lyme-Kegis. |. a, trochanteric ridge; r. radial ; 

 u, ulnar facet. 



proximal extremity angulated, without anterior dorsal ridge, but 

 with deep grooves on that surface above articular expansion. 



