FISHERY BULLETIN: VOL. 76. NO. 3 



ing presumed contaminants, specimens captured 

 during the day came from depths of about 475 to 

 700 m; 80% were taken between 550 and 700 m. At 

 night, captures were made between about 20 and 

 200 m; nearly 80% were taken in the upper 100 m. 



Photosensitive Vesicles 



The organs and associated windows have been 

 described in detail by Young ( 1973); they are simi- 

 lar to those of Abralia trigonura. 



Ahraliopsis sp. B 



Vertical Distribution (Figure 8) 



During the day, 23 specimens taken by the 

 Tucker trawl indicate a depth range of 500 to 650 

 m; most captures came from 500 to 600 m. IKMT 

 data lumped into 100-m increments indicate most 

 specimens came from 400 to 700 m. 



At night, 19 specimens from the Tucker trawl 

 probably came from depths between 50 and 100 m. 

 IKMT data lumped into 50-m increments show a 

 strong peak in the 50- to 100-m interval. A few 

 IKMT captures were made as shallow as 15 m. 



Photosensitive Vesicles (Figure 2B) 



The dorsal and anteroventral organs are similar 

 to other species of Abraliopsis and Abralia. The 

 posterior lobes, however, are absent, and the mid- 

 ventral lobes are enlarged and extended dorsally. 

 In addition, a thin string of vesicles extends from 

 each midventral lobe dorsally between the brain 

 and the optic lobe to join with the dorsal lobe. The 

 structure of this string is slightly variable, and in 

 some specimens the vesicles found about at mid- 



brain level are slightly enlarged and elongate 

 (Figure 2B). The yellow pigment characteristic of 

 the posterior lobes in related species does not occur 

 in any of the lobes of this species. 



Ahraliopsis sp. C 



Vertical Distribution (Figure 9A) 



Only 12 specimens were captured. During the 

 day, five specimens were taken between 500 and 

 600 m. At night, all of the captures were made in 

 the upper 100m. 



o 600 - 



20 30 to 50 



MANTLE LENGTH, m m 



m ANTIE It NGTH 



MANTLE LENGTH, «« 



Figure 8. — Vertical distribution oi^ Ahraliopsis sp. B, Symbols 

 as in Figure 1. 



Figure 9. — A, Vertical distribution ofEnoploteuthis sp. A (cir- 

 cles ) and Enoploteu this sp.B( squares ) . B . Vertical distribution 

 of Ahraliopsis sp. C (circles) and Thelidioteuthis allesandrinii 

 (triangles). Symbols as in Figure 1. 



Photosensitive Vesicles 



The organs are similar to Abralia trigonura and 

 Abraliopsis sp. A except that the posterior lobe is 

 smaller, slightly more medially located, and con- 

 tinuous with the midventral organ. This latter 

 connection, however, does not have the yellow 

 pigment that the posterior organ possesses. Also, a 

 few scattered vesicles lie on the posterior margin 

 of the nerve from the dorsal organ. 



Erioploteuthis sp. A 



Vertical Distribution (Figure 9B) 



During the day, two captures were made be- 

 tween 500 and 600 m; and at night, three captures 

 were made in the upper 100 m. 



Photosensitive Vesicles (Figure lOA) 



The organs are similar to Abralia trigonura 



590 



