PART 1 GARTH : PACIFIC OXYRHYNCHA 471 



Abdomen, in the male, five- [segmented], the third to the fifth seg- 

 ments coalescent. (Alcock, modified) 



Range: Eastern Pacific from Santa Maria Bay, Lower California, 

 and Puerto Refugio, Angel de la Guarda Island, Gulf of California, 

 Mexico, to Santa Elena Bay, Ecuador. Western Atlantic from S of 

 Cape San Bias, Florida, to off St. Thomas, West Indies. Indo-Pacific 

 from Red Sea and Persian Gulf to Australia and Japan. 



Cryptopodia hassleri Rathbun 

 Plate Z 4 , Figs. IS, 15a; Plate 54, Fig. 2 



Cryptopodia hassleri Rathbun, 1925, p. 554, pi. 202, figs. 1, 2. Garth, 

 1948, p. 32. 



Type: Male holotype, M.C.Z. No. 2074; length 6.3 mm, width 

 10.2 mm. 



Type locality : Magdalena Bay, Lower California, Mexico ; Hassler. 



Localities subsequently reported, with collectors: Colombia: Malaga 

 Bay, 9 m, Askoy (Garth). 



Atlantic analogue: Cryptopodia concava Stimpson. 



Diagnosis: Carapace much broader than long. Length and breadth of 

 rostrum subequal. Closed fissures between marginal teeth extending well 

 up on the carapace. (Rathbun) Male first pleopod long, cylindrical, 

 little tapering, a few setae basally, on the lip of the groove, in a marginal 

 row, and in clusters at the blunt tip. Male second pleopod little more 

 than half as long as first, reflexed, a few denticles at base of short, 

 corneous tip. 



Description: Carapace much broader than long; anterolateral mar- 

 gins twice as long as posterolateral; angle between anterolateral and 

 posterolateral margins obtusely rounded ; posterolateral margins arcuate, 

 little convergent posteriorly ; posterior margins straight in female, slightly 

 emarginate in male. Gastrobranchial ridges granulate; branchial ridges 

 straight or slightly sinuous; posterior to these the carapace profoundly 

 depressed except for slightly raised cardiac area. Margins cut into small, 

 truncate teeth separated by closed fissures extending well up on cara- 

 pace, giving the effect of a fluted border that may be semitransparent. 

 Lateral margins covering all but dactyls of legs when extended. Surface 

 smooth and glabrous. Front narrowly triangular. Merus of third maxilli- 

 ped triangular, outer angle extended, inner angle truncate. Sternum 

 concave anteriorly ; a deep concavity receiving the tip of the abdomen in 

 both sexes ; on each side of this a strong crest prolonged to the base of 

 the cheliped. 



