10 AKT. 11.— S, TANAKA. 



CHIMiERA OWSTONI n. sp. PI. I., figs. 2 and 3. 



Of this species I have seen only two specimens, a male and 

 a female, in which rather a robust body, minutely lateral canal 

 undulating, distinct and falcate anal fin, very deep anal notch, 

 and brown color with more or less indistinct pale spots or blotches 

 are characteristic points. Description in detail is as follows : 



Head measured from tip of snout to first gill-opening (snout 

 being rather shortened after preservation) equal to greatest height 

 of body in front of the posterior end of the insertion of first 

 dorsal ; both contained 4§ in total length exclusive of the parts 

 behind the dorsal notch ; height of head in front of insertion 

 of pectoral a little less than height of body ; the height in 

 front of eye If in height of body ; snout 2, eye 3|, inter- 

 orbital 4? in head. Spine of first dorsal curved backwards, 

 its length equal to that of head, longer than the anteriormost 

 ray of first dorsal, its anterior surface smooth, keeled in the 

 median line, its posterior surface for a little less than half its 

 length with recurved spinules as strong as those of phantasma ; 

 anteriormost ray of first dorsal exclusive of its fleshy base 1| 

 in head ; free margin of the fin almost straight, subcontinuous 

 to second dorsal by a fold of rayless skin ; the distance between 

 origin of second dorsal and insertion of pectoral a little less 

 than the distance between the latter and insertion of ventral ; 

 free margin of second dorsal may be either gently convex or 

 concave as shown in the figure ; its posterior margin rounded, 

 continuous to caudal lobe with a deep notch. Anal low, falcate, 

 its notch opposite the dorsal notch and very deep ; lower lobe 

 of caudal higher than the upper, the former extending further 



