EXPLANATION OF PLATE L 



Fig. I. — ProtosphyrcBna perniciosa (Cope). Page 9. Pectoral fin. 

 X \. No. 1901. 



Fig. 2. — ProtosphyrcBna tenuis hoomis. Page 15. Pectoral fin. X i- 

 No. 205. 



Fig. 3. — ProtosphyrcBna tenuis Loomis. Page 16 Distal end of pec- 

 toral fin. X i- No. 1620. 



Fig. 4. — Empo nepaholica Cope. Page 8S. Part of caudal fin. X i- 

 No. 2032. 



