I 921 ] Schmitt: The Marine Decapod Crustacea of California 111 



Pachycheles holosericus sp. nov. 



Plate 33, figure 3 



Description. — Chelipeds unequal, covered on upper surface with a dense, even, 

 velvety pubescence, covering all but the more prominent tubercles and granules, 

 which are arranged in three rows behind the large tubercle on the median distal 

 portion of the palm and the tips and outer surfaces of the fingers, but filling the 

 gape between the fingers of the larger hand. Pubescence in older specimens 

 extends over the outer portion of the lower surface of the joints of the chelipeds. 



There are two rows of granulated tubercles behind the large one near the gape 

 of the fingers; one row of three or four lying in a line immediately behind it, 

 and a second, usually of six, between this row and the row of sharply prominent 

 granules, forming the upper edge of the outer margin of the palm. The large 

 tubercle is approximately twice as high as wide at the base. On the cutting edge 

 of the movable finger of the larger hand, near its base, is a single large, shining 

 white tooth; the fixed or immovable finger is less than half the length of the 

 movable one. The anterior, or inner margin of the carpus is laminate, and cut 

 into a number of spine-tipped, deeply incised, laciniate teeth. 



The telson, as in P. rudis, is composed of five plates: a central (triangular), 

 two terminal, and two lateral. 



The type specimen, a large ovigerous female (Cat. No. 50156, TJ. S. N. M.) was 

 received from the Venice Marine Biological Station at Venice, California, under 

 the number "Ace. 165." The carapace measures 18 mm. long and 19 mm. wide. 



Distribution. — I have also seen specimens from Long Beach, Laguna Beach, 

 La Jolla, and San Diego, California. 



Pachycheles pubescens Holmes 



Plate 33, figure 4 



Pachycheles pubescens Holmes, Occas. Papers Calif. Acad. Sci., '7, 110, 

 1900; Balss, Abh. der k. Bayer. Akad. Wiss., II, Math.-phys. Klasse, 

 Suppl., 9 Abh., p. 32, figs. 22-23, 1913. 



Fig. 112. Pachycheles pubescens, telson of large 5> X 2. 



Characters. — Chelipeds unequal, evenly rounded, not rugose or tuberculated, 

 but quite uniformly granulated; granules completely or nearly hidden by the 

 short, thick pubescence which covers the upper surface, extending almost to the 

 tips of the fingers, filling the gape between them with a dense, bushy growth; 

 interspersed are numerous tufts of longer, stiffer hairs, which arise from the 

 anterior side of the bases of many of the granules. 



On the cutting edge of the movable finger of the larger hand, near its base, 

 there is a large, white, bilobed or double tooth; immovable finger is about half 

 or less than half as long as the movable one. The laminate anterior edge of 

 the carpus is cut into two to four roughly triangular teeth, armed with secondary 

 denticles. 



