60 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Cheliped of male one and one-sixth times as long as carapace. Merus 

 half as broad as long, ischium half as long as merus, both joints with an 

 inferior haiiy border. Carpus without spines but with an inner setose 

 margin. Manus tumid, short and high, superior length and height sub- 

 equal, outer surface convex, pilose, margins setaceous, inner surface 

 smooth, flattened. Fingers short, hairy, denticulate, meeting with a gape 

 in the proximal two thirds in which one tooth of the dactyl is conspicu- 

 ous. (See pi. 13, fig. 3.) 



Ambulatory legs relatively short and stout as compared to other 

 Pacific species of the genus. First leg twice as long as carapace, dactyl one 

 third as long as propodus. Second, third, and fourth legs decreasing in 

 order. Dactyli of all legs, including first, falcate, inner margins denticu- 

 late. Propodus of leg four stout, as strongly curved as the dactylus, and 

 with a basal tuft of hair suggesting a thumb process, against which the 

 dactyl folds. (See pi. 13, fig. 5.) 



Cheliped of female slightly less than length of carapace, hand more 

 slender than in the male, fingers longer, almost meeting when closed. 

 First ambulatoiy leg one and two-thirds times length of carapace. 



Distribution: The eight specimens in Allan Hancock Foundation col- 

 lections range from Tenacatita Bay, Jalisco, Mexico, to Salango Island, 

 Ecuador, from shore to eight fathoms. 



Remarks: This species was at first thought to be Podochela angulata 

 Finnegan (1931) by Mr. Ziesenhenne, who determined the mainland 

 collections of 1933. Later topotypical material from Gorgona Island, 

 Colombia, reveals the following differences: 



(1) The gastric and cardiac regions, while elevate, are not tuber- 

 culate. 



(2) The sides of the carapace are not laterally expanded. 



(3) The female chelae, while slender, are not filiform. 



(4) The merus of the outer maxilliped is longer than broad, instead 

 of broader than long. 



(5) The propodus of the fourth walking leg is thicker and more 

 strongly curved. 



I take pleasure in naming this distinctive species for Mr. Fred C. 

 Ziesenhenne, companion on six Allan Hancock Expeditions, whose dili- 

 gence in the collecting of marine invertebrates has resulted in the dis- 

 covery of more than one species of brachyuran new to science. 



