136 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 24 



without pubescence. Entire cheliped devoid of hairs, or at most a faint 

 trace of pubescence between granules on manus of major cheliped. 



Walking legs almost devoid of hairs, a few scattered setae on pro- 

 podus and dactylus. 



Telson of abdomen with five plates. A pair of pleopods in male. 



Material examined: See Table 42. 



Measurements: Males, 3.0 to 4.5 mm; non-ovigerous female, 2.9 

 mm; ovigerous females, 3.0 to 4.5 mm. The holotype, an ovigerous fe- 

 male, is 3.7 mm in length. 



Color: The color in life was not recorded. Alcoholic specimens have 

 faded to a pale buff. 



Ecology: Pachycheles chacei has been taken in the Pacific from 

 coral recovered at 1-4 fathoms. On the Atlantic coast it was taken in 

 the littoral. 



Ovigerous females (Pacific coast specimens) were collected in Jan- 

 uary. 



Remarks: This species was originally described from the western 

 Atlantic ; on that side of the American continent it is known from only 

 two stations, Bahia Caledonia, Panama, and Cartagena, Colombia. The 

 present writer reported it from the eastern Pacific on the basis of a 

 specimen collected by the Askoy Expedition, and referred specimens 

 called Pachycheles rudis Stimpson by Nobili (1901b) to this species 

 (Haig, 1957b). Additional material studied in connection with the 

 present report shows the species to be well established on the Pacific 

 coast. It has not been taken in abundance anywhere. 



Range: San Jose, Guatemala, south to Bahia de Santa Elena, 

 Ecuador. Western Atlantic: Panama and Colombia. 



Pachycheles calculosus, new species 

 Plate 10; plate 31, fig. 4 

 Types: Holotype, male, U. S. National Museum Cat. No. 102410, 

 from south of La Libertad, Ecuador, rocky shore; January 20, 1933; 

 collected during Allan Hancock Pacific Expedition of 1933 at Velero 

 III station 16-33. Paratypes: 42 specimens from the same and nine 

 other stations (see Table 43). 



Diagnosis: Carapace practically devoid of hairs; carpus covered 

 with granules flattened on anterior half or two-thirds, its anterior mar- 

 gin with a broad lobe, notched to form two shallow teeth ; similar gran- 



