CUIWASSEI) GlKNAUnS. 



205 



AGONI'S DECACOXUS. 



FiK. oil. 



Form of tlir lind/t n-r// rhuii/dted, slidlloir ninl narrow: nHinher of paired ami unpaired plates in a row on the 

 hack from flic ociipiit fn f/if caudal tin almrc 40"; least deptli of the tail, in adalt siiecimens^ 2 % (or sUfjlithj 

 more) of the Icnr/lh of I lie Imdi/ and at most 10 % {or slic/htlf/ more) of the lengtlt of flic head; breadth of the 

 hodji at the base of the jiirtoral fins less than Ki % of its lenijth or than 7o % of the lein/th of the head. Hidges 

 on the head anil on the plates of the bodi/, cren in adalt specimens, raised into s/iincs /niintini/ in a baehward 

 direction. The tiro dorsal tins ipiitv distinct; at least S'' pairs of plates on the bail; betircen them. First dorsal 

 Jin set rather far fiinriinl : the disliincc bctireeu it and the tip uf the snniit less than oO % of the lem/fh of the 

 body, and the leni/lh of the lieiiil innrc than. 7 % of this distance. Eyes large: the loni/itiidinal diameter greater 

 than the least brendth of the infemrbifal space and also more than '> % <f the length of the body, tvhile the least 

 depth of the tail, in adult specimens, is less than 40 % of this diameter. Only firn nasal spines'. About 5 barbels, 

 simple or branched, on each side of the head, one on each side of the loirer jnir and three or four on the dermal 

 fold at the corner of the month: no)ie on the branchiostegal membrane, in the middle of nliieh (below the isthmus) 

 small plates, each irith a tubercle at the middle, are set so as to form an angle (A). 





:Li? -i^^'^.^^T; 





X^^',. 



Fig. .'I'J. A'jKiuix dcoiijoiiii!>, sL'fii from above, from llic siile ami from beneatli, natural size, totretlior with a part of the tail, seen from the 

 side and magnified to sliow tlie pores of the lateral line. Specimen from North Fjord off Disco (Greenland), taken at a depth of 146 



fathoms on a loose, clayey liottom, on the 10th of .Inly, 1871. .Josiw Ll.SD.vHL. 



" 41 — 45. aicordiiig to LCtken; 43 or 44 in tlie specimens belonging to the Royal Museum. 



ii 3 — 5^ according to Coi.i.i^tt; .'5 or 4 in the specimens belonging to the Royal Musenm. 



" Corresponding to the posterior pair in the following species. In adult specimens, however, there are two blunt protuberances on 

 the anterior part of the tip of the snout. 



