66 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 27 



Listriella goleta J. L. Barnard 



Listriella goleta J. L. Barnard 1959a: 20-22, figs. 5-7. 



Material: Normal form with elongated antennae and pigment, but 

 some specimens having rami of uropod 3 equal, others unequal: 



Canyon material: 3166(1), 5006(9), 5367(15), 6498(1), 6804 

 (1), 6806(1), 7030(8), 7038(1), 7044(10), 7284(1). 



Slope ?naterial: 5616(4), depth 72-459 m. 

 Form with shortened antennae and reduced pigment : 



Canyon material: 2192 (2) , 5505 ( 1 ) , 7845 ( 1 ) , depth 1 13-374 m. 



Listriella melanica J. L. Barnard 

 Listriella melanica J. L. Barnard 1959a: 16-18, figs. 1, 2. 

 Canyon material : 4S52 (7) . 



Family LYSIANASSIDAE 



Acidostoma hancocki Hurley 



(Fig. 13) 

 Acidostoma hancocki Hurley 1963 : 37-40, figs. 9, 10. 



Canyon material: 6^31 (juvenile 1.8 mm), 7174( 1 ), 7403( 1 ). 



Remarks: Figures of pereopods, uropod 2 and maxilla 1 are given 

 to supplement Hurley's fine portrayal of this species. The small first 

 maxillary palp is distinct on this small specimen and the peduncle of 

 uropod 2 is not as strongly expanded as it is in the adult stage. 



Anonyx carinatus (Holmes) 

 Lakota carinata Holmes 1908: 498-500, fig. 9; Thorsteinson 1941: 56, 



pi. 2, figs. 16, 17; Gurjanova 1962: 302-303, fig. 100. 

 Anonyx carinatus. — Hurley 1963 : 103-108, figs. 32-34. 



Canyon material: 6845 ( 1 ) , 6846 ( 1 ) . 



Slope material: 2447 ( 1 ) . 



Hippomedon denticulatus (Bate) 

 Hippo?nedon denticulatus (Bate).— Sars 1895: 56-57, pi. 20; Stebbing 

 1906: 59; Chevreux and Fage 1925: 53-54, fig. 37; Gurjanova 

 1951 : 233-234, fig. 96 ; Gurjanova 1962 : 106, fig. 23 only. 

 Canyon material: 6845 (4). 



Hippomedon tenax, new species 



(Fig. 14) 

 Diagnosis: Third pleonal epimeron with nearly straight posterior 

 margin, ventral corner with almost symmetrically tapering, medium-sized, 

 acute posterior tooth, scarcely upturned ; other pleonal epimera rounded 



