290 



POL YPTERINI 



Family COELACANTHIDAE. Coelacanthus, Ag., ; Devonian to Permian, 

 Europe ; Carboniferous, North America. Undina, Munster (Hol&phagiis, 

 Eg.) (Fig. 259) ; Libys, Munster ; Coccoderma, Quenst. ; Heptaiiema, Bell ; 

 Jurassic, Europe. Diplurus, Newb. ; Trias, North America. Macropoma, 

 Ag. (Fig. 261) ; Cretaceous, Europe. 



Division 3. 

 Order POLYPTERINI. 



This Order includes only two genera of living African fish, 

 Polypterus and Calamoichthys, of great interest and importance. No 

 fossil representatives of the Order have yet been found, and 



upc. 



r ' dc. f. 



FIG. 263. 



Skeleton of the right half of the pectoral girdle and of the right I'm of Polypterus bichir, 

 Geoffr. ; inner view, cl, cleitlmim ; co, coracoid ; cv, clavicle ; d.c, distal radial cartilage ; 

 /, dermal rays ; l.pc, lower postelavicle ; -in, inesopterygial bony plate ; m.c, inesopterygial 

 cartilage ; mt, metapterygium, or postaxia^ radial ; n.f, nerve-foramen ; p.ra, preaxial radial ; 

 pst, post-temporal; r, radial; sc, scapula; sc.f, scapular foramen; scl, supraclavicle ; ii.pc, 

 upper postelavicle. 



although Huxley showed some points of resemblance between the 

 Polypterini, the Osteolepidoti, and the Coelacanthini, and united 

 them in the one group Crossopterygidae [227], yet it must be 

 confessed that the living forms remain very isolated, and that their 

 systematic position is still very uncertain. J. Miiller [307], Huxley 

 [227], Leydig [282], Traquair [441-2], Allis [13, 14], Boulenger [41], 

 Pollard [334], and Bridge [54] have studied the anatomy and 



