200 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 21 



Type locality: Southern California, and most certainly Catalina Har- 

 bor, Santa Catalina Island (cf. Rathbun, 1925, p. 178, footnote) ; W. 

 H. Dall, collector. 



Localities subsequently reported, with collectors: California: Off 

 Santa Cruz Island, 30 fathoms, Albatross (Rathbun, 1925) ; Santa Cata- 

 lina Island, J. G. Cooper, Isthmus Harbor and Avalon Bay, Anton 

 Dohrn (Rathbun, 1893b, 1925) ; between Venice and Rocky Point, and 

 Point Fermin, Anton Dohrn ; Point Vicente, San Pedro, and San Cle- 

 mente Island, H. N. Lowe; Point Fermin and off Wilmington, 20 fath- 

 oms, Albatross (all Rathbun, 1925) ; Laguna Beach (Nininger) ; La- 

 guna Beach, W. A. Hilton, La Jolla, Scripps Institution, and San Diego 

 Bay, Albatross (Rathbun, 1925) ; San Diego, C. R. Orcutt, H. Hemp- 

 hill (Rathbun, 1893b) ; 5.2 miles off Point Loma Light, 55-58 fathoms, 

 Albatross (Rathbun, 1925). 



Lower California, Mexico: San Geronimo Island, A. W. Anthony 

 (Rathbun, 1925). 



Atlantic analogue: None. A southern California-west coast of Lower 

 California endemic species. 



Diagnosis: Carapace densely covered with minute vesicles. Hepatic 

 projection a transverse spine ; postorbital projection an ovate lobe directed 

 forward and inclined at a plane perpendicular to it. Branchial spine stout, 

 upturned. Rostral horns slender, divergent. A large lobe on outer margin 

 of basal antennal article ; three smaller lobes on each pterygostomian 

 region. Male manus cristate; carpus bicarinate. Male first pleopod with 

 conical tip opposed by two elongate, channeled projections; an interven- 

 ing, suberect lobule. 



Description: A small species. Carapace subtriangular; in its perfect 

 state covered with short cutaneous vesicles forming prominences on the 

 protogastric, mesogastric, cardiac, intestinal, hepatic, and branchial region 

 (3 dorsal). The anterior part of the protogastric region, as well as the 

 rostrum and the anterolateral margin of the branchial region, covered 

 with curled setae. With these coverings removed, a large tubercle seen 

 on the cardiac and intestinal regions and on each protogastric lobe; 

 median gastric tubercles obsolescent ; branchial regions not areolate. Lat- 

 eral margins with two spines, the hepatic one slender, transverse or nearly 

 so, and almost horizontal, the branchial spine stouter and upturned. 

 Postocular tooth thin, obtuse, its upper surface flattened in a smooth oval 

 plate inclined downward from the horizontal at an angle of about 45 

 degrees. Rostral horns more slender than in Pugettia richi, widely diver- 

 gent. Preocular tooth acuminate. Antennae exceeding rostrum; a large 

 lobe on outer margin of basal article. 



