PART 1 GARTH : PACIFIC OXYRHYNCHA 65 



completely. The male first pleopods (Plate B, fig. 8), which intergrade 

 perfectly, tend to support this view. 



Euprognatha granulata Faxon 

 Plate B, Fig. 9 ; Plate 5, Fig. 1 



Euprognatha granulata Faxon, 1893, p. 149; 1895, p. 6, pi. 1, figs. 1, 

 la. Rathbun, 1925, p. 104, pi. 35, figs. 5, 6. Garth, 1946, p. 372, 

 pi. 53, figs. 1-6. 



Type: Two female cotypes, M.C.Z. No. 4477; cotype length 7 mm, 

 width 6 mm. 



Type locality: Near Cocos Island, Costa Rica, 52 fathoms, Alba- 

 tross station 3369. 



Localities subsequently reported, with collectors: Ecuador: Galapagos 

 Islands, 20-150 fathoms, Velero III (Garth). 



Atlantic analogue: None. 



Diagnosis: Interantennular spine salient, antennal spines exceeding 

 rostral in length. Postocular tooth a broad lobe, anteriorly laciniate, 

 ventrally concave. A single median intestinal spine. Chelipeds of adult 

 male almost four times length of carapace. Orifice of male first pleopod 

 protected by a low, arcuate flap or fold. 



Description: Carapace coarsely granulate; two erect blunt spines in 

 median line of carapace, one on the gastric, the other on the cardiac 

 area; a transverse row of four or five small tubercles in front of the 

 gastric spine; a spine near the middle of each branchial area, with a 

 smaller lateral spine below and a little in advance of it ; the hepatic area 

 bearing a short, blunt spine on its most prominent part; three or four 

 prominent tubercles on the angle dividing the hepatic and pterygostomian 

 regions. Antennary spine very long, reaching beyond the rostral horns; 

 the three horns of the rostrum (interantennulary and lateral) about 

 equal in length ; supraorbital spines well developed, and, like the an- 

 tennary and three rostral spines, conspicuously granulated. Postorbital 

 spines even more coarsely tuberculated, their margins appearing laciniated 

 when viewed from above. Surface of abdomen thickly set with beadlike 

 tubercles; the first segment bearing a prominent granulated spine, a 

 rudimentary spine on each of the three following segments. Chela 

 slender, covered with small tubercles; the remaining segments of the 

 cheliped and the ambulatory appendages furnished with small spines, 

 tubercles, and scattered curled setae. (Faxon, 1893, modified) 



The male differs from Faxon's description of the female (above) 

 in the following particulars: Ratio of length to breadth of carapace 



