34 



RATHBUN 



and fingers subequal. The right foot of the second pair is missing ; the 

 left has a short, stout merus, carpus cup-shaped, with an inner distal 

 tubercle, and a tubercle near the middle of the distal 

 margin ; palm and fingers subequal in length, palm 

 two thirds as broad as long, inner edge marginate, 

 fingers gaping, prehensile edges denticulate, fringed 



with long hair. Dac- 

 tyli of last three pairs 

 of feet with a sub- 

 terminal and a ter- 

 minal spine. 



The telson is twice 

 as long as the pre- 

 ceding segment, and 

 has two pairs of 

 long lateral appressed 

 spines inserted on 

 the anterior half. 

 The outer uropod is as long as the tel- 

 son, the inner uropod a little longer. 



Dimensions. Length of carapace 

 and rostrum 6.7 mm., of rostrum 1.8 

 mm., of abdomen 9 mm. 



Type locality. Off Santa Cruz Is- 

 land, Calif., 30 fathoms (Albatross 

 station 2945), one female. 



This is the only Pontonla described 

 from the west coast of North America, 

 the P. margarita of Smith being a Conchodytes. 



FIG. n. Pontonia calif omiensis (X 4?)- 

 Station 2945. 



Genus Periclimenes Costa. 

 PERICLIMENES TENUIPES (Holmes). 



Anchista tenuipes HOLMES, Occas. Papers Calif. Acad. Sci., VII, 216, 1900. 

 Not P. tenuipes Borra- 

 daile, which may be 

 called P. borradailei, 

 nom. nov. 



Distribution. From San- 

 ta Catalina Island, Califor- 

 nia (Holmes), to Gulf of 

 California. The Albatross 



, FIG. 12. Periclimenes tenuipes (X 4). Concepcion Bay. 



Collected Specimens at . Carapace, b. Foot of second pair. 



