NO. 1007. NEW CYCLOGASTERTD FI^JIEfi—aiLBERT AXD BURKE. 361 



firm than in C. ochotensis, which is a subHttoral species known only 

 from Sagahn. In other structural details, the two species agree 

 closely. 



Only the type known. 



KEY TO JAPANESE SPECIES OF CAREPROCTUS. 



a^ Caudal deeply and sharply forked cypselums, 10. 



a: Caudal not deeply f()rkod-<>ither gently conrave, truncate, or fonvexly rounded. 

 hK Head and body rough with thirk-set multilid prickles. 

 c\ Length of head more than one-fourth the total length; peritoneum silvery, not 

 dotted with l)lack. 

 </'. Diameter of disk about one-tenth length of head; body slender, its depth 



nnich less than one-third the total length rastrinus, 11 



d". Diameter of disk about one-sixth length of head; body deeper, its depth 



much more than one-third the total length acanthodes, 12 



c2. Length of head less than one-fourth the total length; diameter of disk about 

 one-ninth the length of head; body slender, the depth less than one-third 



., ^ the total length trachysoim, IZ. 



b . Mead and body smooth, or with widely scattered simple prickles, 

 f'. Gill slit extending below level of upper i>ectoral ray. 

 /'. Teeth coarse, trilobed; gill slit extending to opposite third pectoral 



^y- • : rhodomelas, 14. 



p. Teeth simple; gill slit extending to opposite fifth or sixth pectoral ray. 



pellucidua, 15. 



e . Gill eht usually confined to area above base of pectoral, rarely extending 



to level of first or second pectoral ray. 



^^ Diameter of ventral disk less than one-fourth length of bead. 



h}. Teeth trilobate, some of the outer teeth simple; in life, transparent, 



with a reddish tinge, slightly dusky posteriorly; lower pectoral 



lobe short ;. . .segaliensis, 16. 



K^. Teeth simple. 

 iK Uniform jet-black, including gill ca\'ity and peritoneum; dis- 

 tance from disk to anus nearly twice the diameter of disk. 



bathycoetus, 17. 

 i*. Not wholly black. 



h\ Distance from disk to anus slightly greater than diameter of 

 disk; lower lobe of pectoral scarcely reaching vent. 



roseo/itsciis, 181 

 F. Distance from disk to anus half diameter of disk; lower pectora. 



lobe long, extending beyond origin of anal fin coUetti, 19. 



g-. Diameter of ventral disk more than one-fourth length of head. 

 /'. Teeth trilobate (weakly so in C. sinensis). 

 mK Body deep and compressed, the depth more than one- 

 fourth the length; texture somewhat gelatinous. 



sinensis, 20. 

 VI-. Body elongate, the depth not exceeding one-fifth the 

 length, 

 n'. Head more than one-fourth the length. . .pycnosoma, 21. 



n^. Head less than one-fourth the length nirilanus, 22. 



P. Teeth simple (a few with weak lobes in C. homoplerus). 



o\ Pectoral indistinctly notched, none of the lower rays 



extending beyond the disk homopterus, 23. 



o2. Pectoral di.stinctly notched, wnth well-developed 

 lower lobe. 



pK Peritoneum jet black entomehs, 24. 



p^ Peritoneum silvery, with scattered black dots. 



entargyreus, 25. 



