PART 1 GARTH : PACIFIC OXYRHYNCHA 87 



West coast of Lower California: W. J. Fisher (Lockington) ; Santa 

 Rosalia Bay, A. W. Anthony (Rathbun, 1925); Santa Maria Bay, 

 Albatross (Rathbun, 1923b) ; Magdalena Bay, 3 fathoms, type locality 

 of Inacfioides brevirostrum (Lockington), C. R. Orcutt (Rathbun, 

 1925) ; off Santa Margarita Island, 47 fathoms, Albatross, type locality 

 of Inachoides magdalenensis (Rathbun, 1893b) ; Abreojos Point to 

 Cape San Lucas, 5.5 to 66 fathoms, Albatross (Rathbun, 1898). 



Gulf of California: near Consag Rock, 20 fathoms, Albatross, type 

 locality of Neorhynchus mexicanus (Rathbun, 1893b). [For additional 

 Albatross records see Rathbun (1925, p. 135).] Santa Inez Bay, 25-35 

 fathoms, Zaca (Crane). 



Costa Rica: Punta Arenas, Ara (Boone, as Collodes granosus). 



Panama: Bay of Panama, 7 and 16 fathoms, Albatross (Rathbun, 

 1898) ; Perlas Islands, Ara (Boone, as Collodes granosus). 



Colombia: Utria Bay [Port Utria], 12-22 meters, Askoy (Garth). 



Atlantic analogue: Not strictly analogous to either of the Atlantic 

 members of the genus, Pyromaia cuspidata Stimpson or P. arachna 

 Rathbun. 



Diagnosis: Carapace broadly pyriform, three median tubercles or 

 spines: one gastric, one cardiac, and one intestinal. Rostrum a simple 

 spine of variable length. Supraorbital arch with a tubercle at summit. 

 Postorbital spine large, curving around eye in adult. Anteroexternal spine 

 of basal antennal article incurving. Male cheliped shorter than all, or 

 all but last pair of walking legs, manus subglobular. Dactyls long, little 

 curved, smooth in adult, spinulous in young. Tip of male first pleopod 

 rounded, a partial constriction opposite rimmed orifice. 



Description: Carapace broadly triangular, pyriform, convex; surface 

 granulate and tuberculate, with fine pubescence; tubercles tending to 

 become spinous on lateral margins and on summit of branchial regions; 

 on median line a spiny tubercle on the posterior part of gastric region, 

 and a stout, spinelike tubercle on cardiac and on intestinal region. The 

 median spines present in adult males becoming tuberculate in females 

 and in smaller specimens, and the gastric tubercle often absent. A shorter 

 spinelike tubercle on first abdominal segment, pointing upward and 

 backward. Rostrum acute; tips of postorbital spines pointing forward; 

 upper margin of orbit prominent but without supraocular spine. Basal 

 antennal article with outer margin prolonged into a slightly incurved 

 spine. Sternum conspicuously granulate or tuberculate, pubescent, deeply 

 grooved between segments. 



