EXPLANATION OF PLATE IV. 



Fig. I. — Spaniodon sinius Cope. Page 47. Nearly complete fish. 

 Type. X X- No. 2508. o. /., anal fin; d. /., dorsal fin; p. f., pectoral 

 iin; v. /., ventral fin. 



Fig. 2. — Spaniodon sinius Cope. Page 47. Anterior half of fish. 

 Paratype. X \- No. 2509. den., dentary; p. /., pectoral fin; pmx., 

 premaxilla. 



Fig. 3. — Leptotrachelus longipinnis Cope. Page 90. Part of trunk. 

 Cotype. X y. No. 2520. d. /., dorsal fin; v. /., ventral fin. 



Fig. 4. — Leptosomus nasutulus (Cope). Page 91. Nearly complete 

 fish. Type. X f. No. 2512. a. f., anal fin; rf. /., dorsal fin; v.f., 

 ventral fin (displaced) . 



Fig. 5. — Leptosomus nasutulus (Cope). Page 91. Nearly complete 

 fish. X J. No. 2513. d. /., dorsal fin; p. f., pectoral fin; v. /., ven- 

 tral fin. 



Fig. 6. — Leptosomus lineatus (Cope). Page 92. Fish with tail miss- 

 ing. Cotype. X y. No. 2538. d. /., dorsal fin; v. /., ventral fin. 



Fig. 7. — Rhinellus tenuirostris Cope. Page 94. Head and part of 

 trunk. Cotype. X \. No. 2514. d. /., dorsal fin. 



Fig. 8. — Rhinellus tenuirostris Cope. Page 94. Head and part of 

 trunk. Cotype. X \- No. 2515. p. f., pectoral fin; v. /., ventral fin. 



Fig. 9. — Sardinius ? imbellis Hay. Page 93. Lower half of fish. 

 Type. X y. No. 2550. a. /., anal fin; p. f., pectoral fin; v. /., 

 ventral fin. 



