40 University of California Publications in Zoology [Vol. 2? 



Dimensions. — Type: length of body 18 mm., of second ehelipeds 16 mm., of 

 hand 7 mm., of carpus 3 mm. 



Type Locality. — Santa Catalina Island, California. 



Distribution. — From Santa Catalina Island, California, to Gulf of California 

 (Eathbun). 



Bemarlcs. — The specimens in the U. S. National Museum, collected in the Gulf 

 of California by the "Albatross," from which the above figure was taken, "agree 

 with Holmes 's description, except that the fingers of the second pair of feet are 

 only a little over half as long as the palm and the posterolateral angle of the 

 sixth abdominal segment is subacute" (Eathbun). Nobili (1917, p. 5) suggests 

 the name holmesi for Periclvmenes tenuipes (Holmes) which he says is preoccupied 

 by P. tenuipes (Leach), but as there does not seem to be any original description 

 I have retained Holmes's name. Borradaile says (1917, p. 376), "I have not 

 been able to find the original description of it [P. tenuipes (Leach)]." 



Family Pandalidae 



Eostrum laterally compressed, long, and armed with teeth or spines. Mandibles 

 with incisor process and palp of two or three segments. First pair of legs 

 slender and usually simple, but often only apparently so, being at times micro- 

 scopically chelate. Second pair long, slender, and chelate, with segmented carpus. 



Key to the California Genera of the Pandalidae 



I. Antennules not longer than the carapace. No laminate expansions on the 

 merus of the third maxilliped and the ischium of the first legs. 



Pandalus, p. 40. 

 II. Antennules twice the length of the carapace. Merus of third maxillipeds and 

 ischium of first legs with a longitudinally developed laminate expansion 

 fringed with long hairs. 



Pandalopsis, p. 46. 



Genus Pandalus Leach 



Eostrum long and prominent, armed above with spines, which are for the 

 greater part movable, and below with fixed and rigid teeth; rostrum continued 

 backward upon the carapace as a median dorsal carina. Antennules not longer 

 than the carapace. Mandible with a three- jointed palp. Second pair of legs 

 unequal, with much segmented carpus. 



None of the species at present known from California have median spines on 

 the abdomen. 



Key to the California Species of Pandalus 



I. Dorsal spines not reaching behind middle of carapace; tip of rostrum acum- 

 inate, often with a small tooth behind the tip dorsally (P. jordani and 

 P. platyceros) , or trifid (P. montagui tridens). 

 A. Sixth segment of abdomen slender, about three times as long as wide. 

 Carapace smooth and shining. 



