34 Pisces. 
PISCES. 
PLEOTOGNATHI. 
Monacanthus ( Aluteres ) fuscus, sp. n., Fischer, p. 75, 'pi. ii. fig. 6, 
Cameroon. 
CYCLOSTOMATA. 
Petromyzon castaneus , Girard. Notes on the occurrence of this species 
in Kansas ; Cragin, p. 99. 
LEPTOCARDII. 
Ryder ; (g). On the availability of embryological characters in the 
classification of the Chordata. 
