Mr. C. V. Burke on the Cyclogasteridae. 511 



body greater tliau length of head. Head deep and heavy ; 

 protile steep. Snout short, not projecting. Nostril single. 

 Gill-slit above the pectoral fin. Caudal connected to the 

 dorsal for nearly half its length. Pectoral notched ; the 

 lower lobe of 8 partly free rays, extending back as far as the 

 upper lobe, exceeding the length ot" the head by a little more 

 than the diameter of the eye. Disk small, somewhat cupped 

 and triangular, the posterior margin tbldtd over. Vent near 

 the disk. Body translucent, pinkish. 



Liparis reinhardi, Liitken, 1898, Danish 'Tngolf Expedition, vol. ii. 



pt. i., Tlie Ichthyolugical Results, p. 14, pi. iii. figs. 3, 3rt (in part, 



not of Ivroyer). 

 Liparis reinliardi, Collett, 1905, Report on Norwegian Fishery and 



Marine Investigations, vol. ii. 1905, no. 3 ; '' Fislje," under Michael 



Sars, Togter i Nordhavet, 1900-1902, p. 97, pi. ii. fig. 7 (in part, 



not of Kroyer). 



Careproctus Jongipinnis is the fourth species from the North 

 Atlantic and Arctic Ocean. From the corresponding region 

 of the Pacific Ocean twenty-nine species are known (the 

 majority of these are as yet undescribed). It is possible that 

 this disparity in numbers will be lessened when the Cyclo- 

 gasteridaj in the Atlantic Ocean become better known. 



The following tentative key to the species of Careproctus 

 from the North Atlantic and adjacent portions of the Arctic 

 Ocean is presented, not with the expectation that it will prove 

 satisftctory, but that it may stimulate an examination of 

 material and the production of a more satisfactory one : — 



A. Lower lobe of pectoral shorter than the head ; depth of 

 body less than length of head ; disk round or oval. 

 B. Eye less than 4 in head (y) ; the pectoral notch hardly 



evident ; dorsal 53 ; anal 49 ; pectoral 28 ranula. 



BB. Eye more than 4 in the head (?). 



C. Pectoral notch deep ; dorsal 55 ; anal 45 ; pec- 

 toral 33 reinhardi. 



CC. Pectoral notch shallow; dorsal 35 (?) ; anal 35 (?). micropus. 

 AA. Lower lobe of pectoral longer than head ; depth of 

 body greater than length of head ; disk somewhat 

 triangular, cupped, the posterior margin folded orer ; 

 vent close to disk lotigipinnis, 



Antarctic Species. 



A number of species of Cyclogaster and Careproctus have 

 been recorded from the Antarctic regions. There has been 

 some uncertainty as to the genera in which these species 

 should be placed. From an examination of the descriptions 

 and figures the writer places these species as follows : — 



