1921 ] Schmitt: The Marine Decapod Crustacea of California 37 



Genus Urocaris Stimpson 



Eostrum prominently toothed above only. Carapace with an hepatic spine, with 

 or without antennal spine, and without branchiostegal spine. Mandible without 

 palp. 



Urocaris infraspinis Rathbun 



Urocaris infraspinis Eathbun, Proc. U. S. Nat. Mus., 24, 903, 1902; 

 H. A. E., 10, 31, fig. 10, 1904. 



Fig. 22. Urocaris infraspinis, 5, X 3%; a, lateral view; b, dorsal view of 

 anterior portion (from Eathbun, U. S. N. M). 



Characters. — Eostrum about two-thirds as long as the carapace, pronouncedly 

 convex above; armed with five to seven teeth, with one or two small teeth below 

 near the tip; behind the rostrum there is a median gastric spine. Antennal and 

 hepatic spines of good size; suborbital angle of carapace blunt. Ocular peduncles 

 with a minute black ocellus above, towards the outside and beyond the limit 

 of the cornea. Antennal scale much longer than the rostrum, with blade con- 

 siderably exceeding the spine. 



Dimensions. — Type, ovigerous female : length of carapace and rostrum 6 mm., 

 of rostrum 2.5 mm., of abdomen 15 mm. 



Type Locality. — Gulf of California, in Concepcion Bay, Lower California 

 ("Albatross"). 



Distribution. — San Diego Bay, California; Gulf of California (Eathbun). 



Family Pontoniidae 



Eostrum laterally compressed and armed with teeth or depressed and unarmed. 

 Antennules with one of the two flagella usually cleft a little distance from the tip. 

 Mandible with incisor process but without palp. First pair of legs chelate and 

 slender. Second pair chelate with one or both legs stouter or longer than first 

 pair. 



