EXPLANATION OF PLATE XXVL 



Fig. I. — Sclerorhynchus hiram Hay. Page 401. Head, part of ros- 

 trum, and pectoral fins. Type. Xf. No. 4501 (3705), 

 br. ar., branchial arches; mo., mouth; mes. p., meso- 

 pterygium; »w^/. />., metapterygium; war., nares; ^./., pec- 

 toral fin; pro. p., propterygium ; rost., rostrum; rest, t., 

 rostral teeth; shag., shagreen. 



Fig. 2. — Stenoprotome hamata Hay. Page 407. Head and part of 

 trunk. Type. Xf IVo. 4509 (3863). 



Fig. 3. — Otodus sulcatus Geinitz. Page 397. Tooth wanting the tip. 

 Front view. X\. No. 4508 (3867). 



Fig. 4. — Side view of .same tooth. 



