FISHES FROM FORMOSA—JORDAN AND EVERMANN. 



ni9 



shallow median groove; eyes smaller than the large spiraeles; ridge 

 of back with a series of blunt spines, the intersoapuhir one hirgest; a 

 short series of three or four spines on the scapular region running- 

 parallel to the median series; dental lamina' slightly undulated; Hooi- 

 of mouth with three tentacles. 



Cutaneous fold along inferior surface of tail distinct, height about 

 one-half i:)upil, beginning below caudal spine and extending to middle 

 of tail; a much shorter and somewhat lower fold on superior surface 

 of tail situated a considerable distance behind the spine; l)ase of tail 

 arnu'd above with a median series of five stout spines situated some 



distance anterior to the caudal spine, which is placed about one-fourth 

 distance from origin of tail; caudal spine of our specimen broken 

 at tip, the basal portion without serrations. 



Coloration above, purplish brown, becoming lighter toward edges 

 of disc and posteriorly; tail like back; below uniform whitish. 



This specimen ditl'ers a little from Dasyatis akajel, but is probably 

 the young of that species. 



L.-nnrth (if (li^r, 210 nun. 

 Width of (li8c, 235 luni. 

 Tail, 420 iiuii. 



Moixiin ntrnix (,/ .specimen No. 77. r. 



I Snout, 0.26. 

 Interorbital width, 0.1." 

 Ventrals, 0.20. 



The proportional measurements are l)ased on length of disc as the 

 unit of comparison. 



