33Q 



BULLETIN OF THE BUREAU OF FISHERIES. 



The funnel shows two large triangular groups of numerous organs symmetrically disposed. As in 

 A . astrosticta four of these only are of the larger type, but in this species they do not lie in a single trans- 

 verse line. The tip of the funnel is colorless and devoid of photophores. The number of these organs 

 on the head and arms is no longer to be made out. 



Subocular organs are present, but the eyes are so damaged that their exact number and position 

 can not be made out with certainty. They appear, however, to be relatively small and distant from 

 one another. 



Color everywhere a brownish buff, heavily clouded with dark reddish chromatophores which are 

 numerous even over the ventral surface. These combine with the bluish photophores to give a purplish 

 cast to the entire animal. 



Measurements of Abralia trigonura. 



Total length 93 



Length excluding tentacles 63 



Length of mantle, dorsal 28. 5 



Extreme length of fins 17 



Length of fins at base 15 



Width across fins 29 



Width of mantle 13 



Width of head 1 1 



Length of — mm. 



Head 1 : 



Dorsal arm 18 



Second arm 22 



Third arm 20 



Ventral arm 21 



Tentacle 49 



Tentacle club 8? 



Funnel 9 



Type. — Catalogue no. 214387, United States National Museum [S. S. B. 275]. 



Type locality. — A Ibalross station 4087, 306 to 308 fathoms, off Mokuhooniki Islet, northeast entrance 

 to Pailolo Channel, fine gray sand bottom, July 21, 1902; one specimen. 



Distribution. — Hawaiian Islands {Albatross). 



Material examined. — The unique type is the only specimen known. 



Remarks. — Although in a rather badly macerated condition, as though taken from the stomach 

 of some larger animal, the single specimen seen still retains enough of its original appearance to show 

 features which forbid its reference to any of the previously described species of either Abralia or 

 Abraliopsis. The lack of terminal organs on the ventral arms and the pale red-dotted buccal membrane 

 alone serve to establish its identity as an Abralia, while the large fins indicate that it will prove to 

 belong to the typical section of that genus. The species to which A. trigonura most closely approxi- 

 mates seems to be the A. andamanica Goodrich from the Bay of Bengal. The mantle of the Hawaiian 

 species, however, appears to be relatively shorter and much more rapidly tapering, and such of the 

 photogenic organs as can be made out fail to coincide in their arrangement with the description given 

 by Goodrich, who fails to mention the definite series of these organs which here adorn the ventral 

 aspect in so conspicuous a fashion that they can scarcely have been overlooked. 



From the other known Hawaiian species, A. astrosticta, it is widely different. The short conical 

 body, larger fins, more numerous small luminous organs on the ventral surface, and much smaller sub- 

 ocular organs are sufficient to distinguish it at a glance. As the specimens obtained of the two species 

 are not very far from one another in size, it is evident that one can not be regarded as but a younger 

 stage of the other. 



Genus ABRALIOPSIS Joubin 1896. 



Abraliopsis Joubin 1896, p. 19. 

 Abraliopsis Pfeffer 1900, p. 166. 168. 

 Abralia Pfeffer 1908a. p. 289-292. 

 Abraliopsis Chun 1910, p. 57, 78. 

 Abralia Pfeffer 1912, p. 124, 137. 

 Abraliopsis Pfeffer 1912, p. 764. 



i uv.= Compsoleuthis+Micrabralia Pfeffer 1900, p. 165. 167. • 



juv. =Nepwteulhion+Prodromoleulhis Pfeffer 1912, p. 149, 151, 165, 167. 



Fins large, sagittate; acutely pointed posteriorly, and not exceeded by the tip of the equally pointed 

 body. Arms with two rows of hooks throughout the greater part of their length, but with true suckers 



