EXPLANATION OF PLATE V. 



Fig. I. — Tricsnaspis virgulatiis Cope. Page 89. Head and part of 

 trunk. Type. X \- No, 2516. d. f., dorsal fin; p. f., pectoral fin; 

 V. /., ventral fin. 



Pig. 2. — Leptosomus lineatus (Cope). Page 92. Hinder half of fish. 

 Cotype. X \. No. 25 n. a. /., anal fin; v. /., ventral fin. 



Fig. 3. — Leptosomus percrassus (Cope). Page 92. Complete fish. 

 Type. X \. No. 2510. a. /., anal fin; d. f., dorsal fin; p. /., pectoral 

 fin; V. /., ventral fin. 



Fig. 4. — Leptotrachelus longipinnis Cope. Page 90. Head, neck, and 

 part of trunk. Cotype. X \. No. 2551. d. j., dorsal fin; p. f. 

 pectoral fin; sn., snout; v. /., ventral fin. 



Lying against the bend in the neck are some remains of another fish. 



