!9 21 ] Schmitt: The Marine Decapod Crustacea of California 255 



Second segment of palp of outer maxilliped very small, shorter, and narrower 

 than first segment, and having the narrow terminal segment attached at about 

 its middle. 



As in F. subquadrata the palm increases in width to the distal end, the fingers 

 are longer and inclined downward a little, the lower margin of the propodus 

 being more markedly sinuous than in subquadrata ; fingers not gaping, hairy along 

 inner surface, a prehensile tooth at middle of dactyl and a smaller one at base 

 of propodal finger. 



[Ambulatory] legs subcylindrical, naked, relative lengths 2, 3, 1, 4, the second 

 leg on right side one-third longer than on left; first leg stouter than the others; 

 propodites slightly curved, but while having nearly parallel margins they are a 

 trifle stouter at distal end ; an exception is that of second right leg, which tapers 

 to distal end; dactyli short, slender, conical, and a little curved up to the hooked, 

 horny tip, except the second of the right side, which is quite straight up to the 

 tip and is also the longest (Eathbun). 



Dimensions. — Type, female: "Carapace about 7 mm. wide; approximate length 

 of [ambulatory] legs of second pair, left 8%, right 11 mm." (Rathbun). 



Type Locality. — Monterey, California; only a single female specimen known. 



Eemarlcs. — Taken from the keyhole limpet, Lucapina crenulata (Eathbun). 



Genus Parapinnixa Holmes 



Carapace much broader than long, smooth, and shining; anterior margin nearly 

 straight. Outer maxillipeds with ischium rudimentary, merus large and tri- 

 angular; palp three-jointed, last joint attached to the tip of the preceding one. 

 First pair of ambulatory legs the largest, the others diminishing successively in 

 length, the last pair being quite small. 



Parapinnixa affinis Holmes 



Parapinnixa affinis, Holmes, Occas. Papers Calif. Acad. Sci., 7, 95, 1900. 



Original Description of Female. — . . . the carapace is less than twice as wide 

 as long . . . ; the surface of the carapace is smooth and shining and the anterior 

 margin straight. Front triangular, depressed, having a short median groove, 

 Antennules oblique. Buccal area small, triangular, rounded in front, the posterior 

 portion partly covered by a projection of the sternum. Chelipeds stout, smooth; 

 hand thickened, smooth, rounded above and below; dactyl hooked at the tip and 

 armed with a small tooth near the middle of the inner margin, the upper side 

 smooth ; pollex [immovable] finger, with two teeth at the tip. First pair of am- 

 bulatory legs larger than the others ; dactyls short and stout. Next two pairs com- 

 paratively slender, having longer dactyls ; last pair small, reaching about to the 

 tip of the merus of the preceding pair; dactyls short and stout. Abdomen of 

 the female widest at the third segment, behind which its shape is triangular, the 

 tip broadly rounded (Holmes). 



Type Locality. — Deadman Island, San Pedro, California. 



Remarks. — This species has not been found since the original specimen was 

 taken and described. 



Genus Pinnixa "White 



Carapace much wider than long, more or less membranaceous. Outer maxilli- 

 peds with ischium small; merus large, distal portion of outer margin convex; palp 

 three-jointed, jointed to summit of merus; third joint articulated on inner side 

 of preceding one near the base. Third pair of ambulatory legs larger and longer 

 than others, usually considerably so. 



