18 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 24 



Chile Exped. (Haig). Corral: P. Krefft (Haig). Seno Reloncavi; 

 Golfo de Ancud: Lund Univ. Chile Exped. (Haig). Puerto San 

 Pedro, Isia Chiloe: Hassler (Haig). Islas Guaitecas: Lund Univ. 

 Chile Exped. (Haig). Port Otway [Puerto Barroso] ; Estrecho 

 de Magallanes : Nassau (Cunningham). 



Diagnosis: Carapace smooth; front strongly produced beyond eyes, 

 spinulate on margin, trilobate, the median lobe broad, triangular, lateral 

 lobes very narrow, scarcely projecting; chelipeds weak, scarcely longer 

 than walking legs, carpus armed on anterior margin with two or three 

 narrow, wide-set teeth ; dactylus of walking legs with a thick tuft of hairs 

 on posterior margin, other segments naked or with a few scattered 

 hairs. 



Description: Carapace usually a little longer than broad; smooth, 

 except for light plications on posterolateral area; regions scarcely 

 marked. Front trilobate, median lobe broad, triangular, strongly pro- 

 duced beyond lateral lobes, the latter very narrow, scarcely projecting 

 in young specimens and some adults. Orbits shallow, straight or slightly 

 concave, sharply oblique, outer orbital angle slightly or not at all pro- 

 duced, the supraorbital margin forming a nearly straight line with the 

 hepatic margin to anterior limit of epibranchial region, this limit 

 marked by a minute marginal notch but no cervical groove. Frontal, 

 orbital, and hepatic margins beset with small, strongly projecting gran- 

 ules or minute spinules. 



Text-fig. 2. Basal segment of right antennule of Liopeirolisthes tniira, x 20. 



First movable segment of antenna granular or somewhat nodular; 

 second granular, with a distal anterior nodule; third somewhat gran- 

 ular; flagellum with very short hairs visible only under magnification. 

 Outer maxillipeds smooth, ischium elongate. 



Chelipeds scarcely longer than walking legs, covered with small 

 granules. Merus with a strongly projecting, distally directed tooth on 



