44 DISCOVERY REPORTS 



interorbital region narrow ; post-temporal not prominent ; opercles not spinate. Mouth 

 of moderate size ; a mental barbel present ; teeth in villiform bands, without distinct 

 canines. Spinous dorsal fin placed above the base of the pectoral. Vertebrae 38 



(15 + 23)- 

 Five species. 

 Coasts of the Antarctic Continent, extending northwards in the Weddell Quadrant 



to South Georgia. 



Key to the Species 



I. Maxillary not extending beyond anterior ^ of eye; dorsal II-IV, 23-28; anal 16-21. 



A. Eye 3 A to 4 in head; barbel club-shaped, with papillose terminal knob, in the male, 

 without distal expansion in the female, its length from less than I to nearly I that 

 of head. 



1. Depth 4 to 4^ in length; last ray of anal joined or nearly joined to base of caudal; 

 pelvic fins not nearly reaching vent ... ... ... ... ... i- mirus. 



2. Depth 5 to 5 i in length; last ray of anal separated by an interspace from caudal; 

 pelvic fins reaching vent or origin of anal 2. orianae. 



B. Eye z% to 3I in head; barbel without distal expansion in both sexes, either smooth, 

 finely papillose, or slightly fringed, its length never more than \ that of head. 



1. Caudal fin rounded or subtruncate; dorsal II-IV, 24-27 3. skottsbergi. 



2. Caudal fin slightly emarginate; dorsal II-III, 26-28 4. loennbergi. 



II. Maxillary extending to or nearly to below middle of eye; dorsal III-V, 27-30; anal 19-20; 

 eye 3^ to 3I in head; barbel smooth, tapering, its length \ to more than \ that of head. 



5 . shackletoni. 



Artedidraco mirus, Lonnberg. 



Artedidraco mirus, Lonnberg, 1905, Wiss. Ergebn. Schwed. Siidpol.-Exped., v (6), p. 40, pi. i, 

 fig. 4, pi. iv, fig. 14; Regan, 1913, Trans. R. Soc. Edinburgh, XLix, p. 280. 

 St. MS 71. 9. iii. 26. East Cumberland Bay, South Georgia. Small beam trawl, 110-60 m.: 

 I specimen, 73 mm. 



St. 39. 25. iii. 26. East Cumberland Bay, South Georgia. Large otter trawl, 179-235 m.: 1 

 specimen, 100 mm. 



St. 42. I. iv. 26. Off mouth of Cumberland Bay, South Georgia. Large otter trawl, 120-204 m. : 



1 specimen, 93 mm. 



St. WS 25. 17. xii. 26. Undine Harbour (North), South Georgia. Small beam trawl, 18-27 ^■'■ 



2 specimens, 65, 70 mm. 



St. 140. 23. xii. 26. Stromness Harbour to Larsen Point, South Georgia. Large otter trawl, 

 122-136 m.: 12 specimens, 33-107 mm. 



St. 142. 30. xii. 26. East Cumberland Bay, South Georgia. Net (7 mm. mesh), attached to back 

 of trawl, 88-273 "!•• I specimen, 105 mm. 



St. 148. 9. i. 27. Off Cape Saunders, South Georgia. Large otter trawl, with net (4 mm. mesh) 

 attached, 132-148 m.: 2 specimens, 92, 100 mm. 



St. 149. 10. i. 27. Mouth of East Cumberland Bay, South Georgia. Large otter trawl, 200- 

 234 m.: 4 specimens, 95-115 mm. 



Depth of body 4 to 4-1 in the length, length of head 2| to a little more than 3 . Diameter 

 of eye 3^ to 4, interorbital width about 9 in length of head. Maxillary extending to 

 below anterior 1 or 1 of eye ; barbel from less than ^ to nearly i length of head, with 

 a papillose terminal knob in the male, smooth and without distal expansion in the 

 female; 6 or 7 gill-rakers on lower part of anterior arch. Upper lateral line short. 



