PISCES: ANTARCTIC FISHES 15 



and this, contained three and a half times in the length of the body (the proportion 

 approximately rendered by Boulenger and Vaillant), would yield a length 

 of 193 mm. 



ARTEDIDRACO, Lonnberg, 1908 



Since writing the foregoing I have received the account of the fishes of the 

 Swedish South Polar Expedition by Lonnberg.* 



The genus Artedidraco is therein diagnosed, and is represented by two species 

 A. mirus and A. skottsbergi. 



The specimen previously referred to as a member of this genus, but which, owing 

 to the want of Lonnberg's paper, could not be specifically determined, proves to 

 be a species distinct from either of the two previously described forms. It will be 

 known as 



Artedidraco shackletoni, sp. nov. (Plate II.) 

 B. V. ; D. V. 27 ; A. 20 ; V. I. 5 ; P. 15 ; C. 12 ; L. lat. 19 + 19. 



Head broad, depressed ; body rounded anteriorly, compressed behind. Length 

 of head, 2'8 ; height of body, 4'2 ; length of caudal, 37 in the total ; diameter of eye, 

 37 ; interorbital space, 10'2 ; and length of snout, 4'1 in the head. 



Mouth large and horizontal ; the maxilla extends to below the middle of the eye, 

 and the upper jaw is the longer ; mental barb simple, its length equal to the diameter 

 of the eye. The eye is large and prominent and cuts the upper profile ; the nostril is 

 in a long tube, placed a little nearer to the eye than to the margin of the preorbital. 

 There are a number of large pores with raised rims on the head placed as shown in 

 the figure. Opercular spine as in A. mirus. 



The teeth are confined to the jaws and form a narrow band in each ; the edges of 

 the lips and the frenum behind the teeth are studded with minute papillae. 



The two anterior spines of the dorsal are abruptly bent near their tips, possibly 

 an individual malformation; the second is the longest, its length being 2 '5 in that 

 of the head ; the last spine does not quite reach to the second fin. The latter is high ; 

 the longest rays are the seventh to tenth, which are subequal, and a little more 

 than one-half the length of the head ; the last few rays are rapidly shortened and 

 extend to the base of the caudal rays. The anal rays are much shorter than those of 

 the dorsal and have their tips free. Anal papilla prominent. The ventrals are widely 

 separated and are set quite horizontally ; the fourth ray, which is the longest, is less 

 than half the length of the head. The pectoral has a broad base and is rounded ; it 

 does not quite reach the origin of the anal. The caudal is feebly rounded, its peduncle 

 is much compressed, and its least depth is less than the diameter of the eye. 



The whole fish is scaleless, but is covered with mucus ; the lateral line is formed 

 of nineteen pores, which are a continuation of the post-orbital row of pores, and form 



* Lonnberg, Wiss, Ergeb. Schwed. Sudpolar-Exped., V., Zool. I., 1908. 



