!92l] Schnvitt: The Marine Deeapod Crustacea of California 245 

 Lophopanopeus diegensis Eathbun 



Plate 37, figure 5 



Lophopanopeus diegensis Eathbun, Amer. Nat., 34, 137, 1900; H. A. E., 10, 

 184, pi. 9, fig. 3, 1904; Weymouth, Stanford Univ. Publ., Univ. Ser., 

 no. 4, 52, pi. 12, fig. 39, 1910. 



Fig. 146. Lophopanopeus diegensis, <$, X 1% (from Eathbun). 



Characters. — Carajjace with a few granulate lines on the anterolateral regions; 

 frontal lobes slightly oblique and sinuous, outer tooth inconspicuous. (The front 

 is deflexed so that its true edge does not show in the view figured.) Carpus of 

 chelipeds with about thirty-five irregularly placed tubercles, some of them 

 forming lines; hand bicarinate above, the inner carina having a small prominence 

 at the proximal end; inner surface of hand with a few tubercles on upper part; 

 outer surface with upper and proximal portion rough, with five granulated rugae; 

 dark color of fingers not running back on palm. Carpal joints of ambulatory legs 

 with two prominent, naked, truncate tubercles on the anterior margin, a character 

 by which this species may at once be recognized; propodal joints with a slightly 

 convex anterior margin. 



Dimensions. — Type, male: length 7.9 mm., width 11.4 mm., proportion of length 

 to width 1:1.44; fronto-orbital width 6.6 mm., proportion of fronto-orbital width 

 to width of carapace 1 : 1.37. 



Color. — In life dull brown or blackish, occasionally tinged with red but never 

 conspicuously marked as in L. heathii (Weymouth). 



Type Locality. — San Diego, California. 



Distribution. — Monterey Bay to San Diego Bay, California, 10 to 31 fathoms 

 (Eathbun). 



Genus Xanthias Eathbun 



Carapace transversely oval; front broad, bilobed; anterolateral border cut 

 into three or four tuberculiform or even spinous lobes or teeth, fronto-orbital 

 border considerably more than half the greatest width of the carapace. Ambula- 

 tory legs devoid of a crest, but more or less spinous or granular on upper margin. 

 Abdomen of male five-jointed. 



Key to the California Species of Xanthias 



I. Movable fingers of chelae very long and curved abruptly downward. (Only 



one specimen known, from San Diego.) 



latimanus, p. 247. 



II. Movable fingers of chelae stout, not abruptly curved downward. (Not known 



north of Monterey.) 



taylori, p. 246. 



