70 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 27 



Opisa tridentata Hurley 



Opisa tridentata Hurley 1963 : 26-30, figs. 4, 5. 

 Canyon material: 5960(2). 



Orchomene decipiens Hurley, new combination 



Orchomenella decipiens Hurley 1963 : 127-130, figs. 43, 44. 



Canyon material: 2192(1), 4846(1), 4851(2), 5114(4), 5676(1), 

 6780(1), 6781(17), 6845(4), 6846(1), 7038(1), 7047(1), 7174(1), 

 7284(4). 



Slope material: 21 m {2). 



Orchomene pacifica Gurjanova, new combination 



Orcho?nenella pacifica Gurjanova 1938: 252-254, fig. 3; Gurjanova 

 1951: 287, fig. 155; Gurjanova 1962: 174-177, figs. 52, 53. 

 Canyon material .-7038(5), 7044 ( 1 ) . 

 Slope material: 2843 ( 1 ) . 



Pachynus barnardi Hurley 



Pachynus barnardi Hurley 1963 : 31-35, figs. 6, 7. 



Canyon material: 3385(2), 4851(1), 5367(1), 5960(4), 6499(1), 

 6835(1), 6845(2), 6898(1), 6909(1), 7029(1), 7054(1), 7174(1). 



Slope material: 2361 ( 1 ) . 



Prachynella lodo J. L. Barnard 



Prachynella lodo J. L. Barnard 1964b: 233, fig. 7. 



Canyon material : 6804 ( 1 ) , 6822 ( 2 ) , 7038 ( 2 ) , 7044 ( 1 ) . 



Pseudokoroga rima J. L. Barnard 



Pseudokoroga rima J. L. Barnard 1964c: 95-99, figs. 14-17. 

 Canyon material: 4852(2). 



Schisturella Norman 



Schist urella Norman 1900 : 208 



Diagnosis: Mouthparts arranged in a quadrate bundle; mandible 

 with a distinct, non-dentate cutting edge, strongly triturate molar, palp 

 attached level with molar; maxilla 1 with biarticulate palp; gnathopod 

 1 subchelate or nearly simple; telson cleft more than one- fourth of its 

 length ; coxa 1 very small, largely hidden by coxa 2, about half as 

 long as article 2 of gnathopod 1 ; branchiae pleated on one side ; upper 

 lip lobately produced in front of epistome; inner ramus of uropod 2 

 with deep marginal incision. 



Type species: Tryphosa pulchra Hansen. 



