PART 1 GARTH : PACIFIC OXYRHYNCHA 269 



Key to the Pacific Species of Pelia 



la. Rostrum of moderate length, or not more than one-third of the 



remaining carapace length. Only the tip of basal antennal article 



exposed dorsally 



2a. Carapace narrow, width from two-thirds to three-fourths 

 total length. Rostral horns from one-third to one-fourth 

 length of remainder of carapace. Basal antennal article elon- 

 gate, succeeding two articles slender, the second falling 

 short of tip of rostrum. Digital tooth of male cheliped 

 molariform. Male first pleopod slender, not bent to tip 

 tumida 



2b. Carapace broader, width from three-fourths to four-fifths 

 total length. Rostral horns from one-fourth to one-eighth 

 length of remainder of carapace. Basal antennal article 

 broad, succeeding two articles wide as one rostral horn, 

 the second reaching or exceeding tip of rostrum. Digital 

 tooth of male cheliped a simple tubercle. Male first pleopod 

 broad, bent sharply before tip ... pacifica 



lb. Rostrum long, or nearly half of the remaining carapace length. 



Almost the entire basal antennal article exposed dorsally. 



Galapagos only? pulchella 



Pelia pulchella Bell 



Pelia pulchella Bell, 1835b, p. 170; 1836, p. 45, pi. 9, figs. 2, 2d-f. 

 A. Milne Edwards, 1875, p. 72. Rathbun, 1910, p. 572; 1925, p. 

 284, pi. 241, figs. 1-4. Boone, 1927, p. 142, fig. 40. Garth, 1946, p. 

 380. 



Type: Male holotype, length 8.5 mm, width 5.3 mm, originally 

 deposited in the Museum of the Zoological Society (London), no longer 

 extant. 



Type locality : Galapagos Islands, 6 fathoms, sandy mud ; Hugh 

 Cuming, collector. 



Localities subsequently reported, with collectors: None. 



Diagnosis: Carapace narrow, width from four-sevenths to five- 

 eighths total length. Rostral horns long, nearly half the length of re- 

 mainder of carapace. Basal article of antenna almost wholly exposed in 

 dorsal view, second movable article falling short of tip of rostrum. 

 Presence of digital tooth of male cheliped not ascertainable. Nature of 

 male first pleopod unknown. 



