I 



1 

 I 



PLATE 71. I 



I 

 I 

 DASYBATIDAE. 



Fig. 1-2. Dasybatus guttatus. M. C. Z. 639 (Page 391). Fig. 3. Dasybatus zugei. 

 M. C. Z. 23 (Page 398). Fig. 4-5. Taenidra lymma. M. C. Z. 620 (Page 399). i 



1, 3, 4. Dorsal view. ^ 



2, 5. Ventral view. j 



Rigidity of the disk around tlie head and tlie branchial chamber is secured by the elongation and ' 



firmness of the propterygial segment of the pectoral ba,se. The copula, hbr', unlike that of the Raiidae, 

 is segmented; anteriorly, in the ba.sibranchial portion, it broadens toward the suspensorium, hyomandi- 

 bular, hin. The ceratobranchials are more or less consolidatefl and enlarged, as also the basihyals. The 

 branchial ray, or rays, at the outer ends of the ceratohyals and ceratobranchials are attached to the bases 

 of the pectoral at their outer ends but are not modified. 



