COPE ON CEETACEOUS AND TEETIARY FISHES. 77 



Axial length to origin of ventral fin 0. 041 



Axial length to origin of anal fin 0. 057 



Axial length to origin of second dorsal fin 0. 056 



Axial length to origin of caudal fin 0. 082 



Depth of caudal pediancle 0. 01(5 



The preopercular border is not visible in the only specimen of this 

 species known to me. The operculum is scaly. There are 11-13 rows 

 of scales on a line from the vertebral column to the abdominal border. 



I note here that further examination shows that there are from 20 to 

 25 longitudinal rows of scales on the side of the abdomen of P. serrata, 

 but the number is not exactly determinable, owing to the condition of 

 the specimens. 



Dapedoglossus ^quipinnis, sp. nov. 



Two specimens present the principal character of this species, viz, 

 the equality in number of rays in the dorsal and anal fins and the near 

 equality in their size. The radii are in one, D. 23; A. 22: in the other, 

 D. 22 ; A. 22. In D, testis, the formula is D. 11—18 ; A. 11—26. The ver- 

 tebrae in one of the specimens of D. cequipinnis number, D. 19; 0. 27: 

 while in D. testis there are, D. 18; C. 24-25. (The number, 21 dorsal, 

 originally given, must be corrected, as based on an imperfect specimen.) 

 In D. cequipinnis, the first pectoral ray is not so largely developed as in 

 D. testis, not being of unusual size. The hyoid apparatus and vomer 

 are closely studded with teeth, as required by the generic character. 



Measurements. 



M. 



Length of No. 1 0,051 



Axial length of head of No. 1 0.014 



Axial length to line of anal fin 0. 030 



Axial length to line of dorsal 0. 028 



Axial length to origin of caudal 0.040 



Depth of head , 0.012 



Depth at first dorsal ray 0.008 



Depth of caudal peduncle . . .. 0.004 



Lengthof No. 2 0.092 



Depth at middle of dorsal line 0. 0.32 



Depth at base of dorsal fin 0.024 



Depth of caudal peduncle 0.008 



The specimens described are much smaller than those of the I>. testis 

 yet known, but No. 1 is probably young. This fact will not account 

 tor the peculiarity of the radial formula, etc. 



I add here that there are two vertebrae included within the caudal fin 

 in Dapedoglossus. 



