PART 1 GARTH : PACIFIC OXYRHYNCHA 127 



female is described (Garth, 1946, p. 371) as having a sternum consisting 

 of a series of convoluted ridges leading to the bases of the walking legs 

 in the manner of P. vestita. A single specimen of Podochela from the 

 Revilla Gigedo Islands which has evolved along parallel lines, but of 

 which insufficient material exists upon which to base a separate species, is 

 included with material examined under P. vestita. 



Podochela ziesenhennei Garth 

 Plate H, Fig. 9; Plate 8, Fig. 5 



Podochela ziesenhennei Garth, 1940, p. 58, pi. 13, figs. 1-6. 



Type: Male holotype, U.S.N.M. No. 78780, length 11 mm, width 

 7.8 mm. 



Type locality : Tenacatita Bay, Jalisco, Mexico, 4-10 fathoms, Velero 

 III station 122-33. 



Additional localities reported, ivith collectors: Ecuador: Salango 

 Island, 8 fathoms, Velero III (Garth). 



Atlantic analogue: None. (See Remarks below) 



Diagnosis: Rostrum short, thick, triangular. Carapace triangular; 

 gastric region high and broad. Hepatic regions little projecting; no out- 

 ward flare at base of ambulatories. Basal antennal article broad, ridged. 

 First walking leg two and one-quarter times carapace length, dactylus 

 almost half as long as propodus. Propodi of legs three and four falcate 

 and with a thumb process against which dactyli fold. Male manus short 

 and high, swollen, but not gaping. Curved hair count 9. 



Description: Carapace narrowly triangular, branchial and intestinal 

 regions depressed. Rostrum thick, bluntly triangular, length and breadth 

 subequal, two double rows of short, curved setae. Orbits circular, un- 

 armed ; a minute postorbital granule. Hepatic regions projecting but little 

 beyond lateral contour. Gastric region high, broad, surmounted by four 

 groups of setae arranged in a rectangle but with no median tubercle. 

 Cardiac elevation small, nontuberculate, and set off from branchial and 

 intestinal areas. Branchial regions low, traversed by a longitudinal row 

 of curved setae, sides not produced laterally to cover insertions of ambu- 

 latory legs. Body and appendages densely pilose. 



Antennae visible at sides of rostrum ; basal article broad, traversed by 

 a median ridge; flagellum short, second free segment overreaching ros- 

 trum. External maxilliped with merus longer than broad, sides diverging 

 anteriorly, anterointernal angle not produced, internal margin spinulous. 

 Two low hairy ridges on sternum opposite coxae of chelipeds in place of 

 usual tubercles. 



