the Ccelacatiih Fish. 



321 



wliich is, in my opinion, one o£ the most important contribu- 

 tions ever made to fish morphology. I find, to my great 

 pleasure, that Dr. Stensio has been able to describe in the 

 new genus Wimania nearly all (he structures which occur 

 in Macropoma, and that his interpretation is in nearly all 

 })oints in complete agreement with that which I had 

 reached. 



In some respects, however, my material is more complete 

 than his, and I therefore give an account o£ the head of 

 Afacropoma as an introduction to a discussion of the relation- 

 ships of the group to which it belongs. 



Fi-. 1. 



Op.Pf 



'^ j(M"'^i Lx.Oc. 



Macropohia mantelli, Ag-. Lateral view of the skull, with the dermil 

 bones and pterygoidal apparatus of the left side reiuoved. X 1. 



EcTt., ectopterygoid ; Ex.Oc, exoccipital; Op.Pr., foramen probably 

 for the opthalmicus profundus nerve; P.V., "prevomer" and 

 its tooth-plate; 1'al., palatine tooth-plate; Par.Sp., i>ara- 

 sphenoid ; Pr.Ot., prootic ; Pt., pterygoid ; Qu., quadrate ; 

 III., foramen for tliird or sixth cranial nerve ; IV , foramen for 

 fourth cranial nerve (^?). 



Basioccipifal. — Tlie basioccipital is a small very thin bone, 

 with nearly fiat dorsal and ventral surfaces, which are square. 

 It only ossified in full-grown individuals, lis anterior and 



.Inn. (i; Mag. N. Hist. Ser. 9. Vol. viii, 21 



