18 BULLETIN 150, UNITED STATES NATIONAL MUSEUM 



Table showing number of unsegmented dorsal and anal rays in specimens examined 



Name 



Liparis callyodon. 

 Do 



Do 



Do... 



Do 



Do 



Do . 



Liparis tunicatus 



Do . 



Liparis herschelinus 



Liparis ailanticus 



Do 



Do 



Liparis rutteri 



Liparis mucosus 



Liparis dennyi 



Poly per a greeni 



Do 



Liparis agassizii 



Do 



Do...- 



Liparis major 



Carepr actus gilberti 



Do 



Careproctus melanurus.. 



Careproctus sinensis 



Careproctus ranula 



Crystallichihys mirabilis. 



Paraliparis copei 



Do 



Do 



Paraliparis deani 



Do 



Paraliparis cephalus 



Nectoliparis pelagicus 



Length 

 in mm. 



53 

 40 

 78 

 95 

 42 

 55 

 48 

 60 

 100 

 ? 



70 



65 



95 



? 



82 

 65 

 125 

 230 

 92 

 125 

 165 

 105 



Unseg- 

 mented 

 dorsal 

 rays 



15 

 14 

 14 

 14 

 14 

 15 

 12 

 12 

 11 

 10 

 17 



26 



27 

 10 

 15 

 11 

 16 

 16 



9 



7 



8 

 15 

 15 

 12 



9 

 15 

 14 



? 

 18 



? 

 13 



9 

 11 

 10 

 18 



Unseg- 

 mented 

 anal 



raj's 



3 

 2 

 3 

 3 

 2 

 4 

 ? 



3 

 1 

 2 

 ? 



i 



2 

 4 

 1 

 2 

 3 

 2 

 1 

 2 

 5 

 7 

 & 

 3 

 3 

 4 

 12 



16 



8 



10 



4 



4 



6 



12 



1 5 in first dorsal. 



' 4 in first dorsal. 



Anal Jin. — The anal fin bears a close resemblance to the dorsal. 

 The anterior rays appear to be spinous — that is, unsegmented. The 

 number of unsegmented rays is greater in the more specialized gen- 

 era. The connection with the caudal is nearly always greater than the 

 dorsal connection with the caudal. * The dorsal and anal are never 

 continuous, the caudal always being distinct. 



Caudal Jin. — The posterior margin of the caudal is typically formed 

 of about 10 ra3^s, though there may be as many as 12 or 14. In addi- 

 tion to these there are in most species a number of rudimentary rays 

 at the base of the caudal which may increase the number to 20. 



The average number of caudal rays is slightly reduced in Care- 

 proctus and further reduced in Paraliparis. The greatest reduction 

 of the caudal is found in RMnoliparis attenuatus, where it is represented 



