ART. 13 ANATOMY OF CHINESE FINLESS POEPOISE HOWELL 



31 



An attempt to divide the rhomholdeus was unsuccessful, possibly 

 because of the condition of the specimens,. This is a large muscle, 

 with origin from the middorsal line as usual and insertion onto the 

 investing membrane of the scapula along the entire vertebral border. 

 The muscle is single in Balaenoptera and apparently in Glohio- 

 cephala also, but divisible into a superficial and a deep layer in 

 Kogia. In all three the attachments and extent are substantially the 

 same. There is no occipitoscapularis in Neomeris^ this genus thus 

 apparently agreeing with Balaenoptera and GloMocephala^ but not 

 with Kogia, in which it is present. 



There is a very weak levator anffuli scapulae or atlantoscapularis. 

 Origin is from the transverse process of the atlas, and insertion upon 



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 Fig. 11. — Body and deep keck musculature of right side of neomeris 



the scapular membrane over the coracovertebral angle and along the 

 border for a short distance ventrad. In the other genera mentioned 

 this muscle is very similar, but there seem to be slight differences in 

 the precise disposition of the insertion. 



Intrinsic hack musculature. — The splenius is very thin, with origin 

 from some 100 mm. of the middorsal line. The fibers, running 

 cranio-laterad as usual, are inserted upon the occipital in a line ex- 

 tending from 25 mm. laterad of the vertex almost to the squamosal. 

 In Balaenoptera this muscle seems to be thicker but narrower; in 

 Kogia it is both narrow and thin, inserting merely onto the exoccipi- 

 tal; while in the illustrations of Glohiocephala it is shown as an 

 immense mass of muscle. 



