EXPLANATION OF PLATE XXVII. 



Fig. I. — Sclerorhynchus sentus Hay. Page 402. Portion of the ros- 

 trum. Type. X|. No. 4504 (3S64). The rostral teeth 

 are shown on the right side of the anterior end. 



Fig. 2. — Stenoproiome hamata Hay. Page 407. Head and several 

 dermal scutes. Type. Xj- No. 4509 (3863). a, h, c, c, 

 dermal scutes; d, supposed lower jaw. 



