276 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.21 



specimens from Uvita, Costa Rica) Dark red. (Crane, of specimens from 

 Corinto, Nicaragua) 



Habitat: On under sides of sponge- and algae-grown stones; in tide- 

 pools ; in Pocillopora coral. Well covered with hydroids, sponges, algae, 

 and sand grains. (Crane) As in the preceding species, susceptibility to 

 parasites is shown, a female specimen from Ecuador being host to a 

 rhizocephalan. 



Depth: Customarily recovered intertidally, but on occasion, as at 

 Manta Bay and La Libertad, Ecuador, dredged in 1-2 fathoms. 



Size and sex: Males in the present series range in size from 5.4 to 

 9.6 mm, females from 5.2 to 7.5 mm, ovigerous females the same, and 

 young from 4.0 mm. 



Breeding: Eggs in January-March. (Crane) Ovigerous females were 

 obtained by Velero III collectors at Manta and La Libertad, Ecuador, 

 in January, and at Zorritos Light, Peru, in February, and by Velero IV 

 collectors at Acapulco, Mexico, in February. An egg-bearing female was 

 collected by Elinor D. Robson at Bellavista, Panama, in February or 

 March. 



Remarks: The two males from Playa Blanca, Costa Rica, Velero III 

 station 465-35, have a small rostrum, the tips of which converge, a short, 

 wide basal antennal article, and the first two movable antennal segments 

 are as wide as one of the rostral horns and are contained within its length. 

 The teeth of the dactyl of the chela (see text-fig. 6B) are two in number 

 and simple, not molariform, as is the single digital tooth of Pelia tumida 

 (see text-fig. 6A). The two males from Changame, Panama, Elinor 

 Robson, collector, have the elongate hand and bicuspid digital tooth of 

 P. tumida, but in body proportion, length of rostrum, and other par- 

 ticulars belong in the P. pacifica series. A female specimen from Port 

 Utria, Colombia, Velero III station 239a-34, has a rostrum only about 

 one-eighth the length of the carapace. The series from Zorritos Light, 

 northern Peru, station 847-38, consists of an 8 mm male of undoubted 

 maturity and five ovigerous females. The male clearly shows the narrow 

 fingers and correspondingly wide gape, and the digital tooth is again 

 simple (see text-fig. 6C). The male first pleopod, however, is atypical 

 (see Plate Q, fig. 4). 



