1921] Schmitt: The Marine Decapod Crustacea of California 239 
Genus Cycloxanthops Rathbun 
Carapace broad; front horizontal, prominent, and divided by a median fissure 
into two lamellate lobes, which are truncated and separated from the inner orbital 
angle by a rather deep fissure; orbits small, with two fissures in supraorbital 
margin, external orbital angles inconspicuous, continuous with anterolateral mar- 
gins, which are very long, strongly curved, extending far backward; fronto- 
orbital border less than half the greatest width of the carapace. Abdomen of 
male five-jointed. 
Genus Cycloxanthops Rathbun 
Key TO THE CALIFORNIA SPECIES OF CYCLOXANTHOPS 
I. Carapace flattened, convex, granular and rugose in front, and more or less 
punctate behind. (Not known north of Monterey Bay.) 
novemdentatus, p. 239. 
II. Carapace very uneven, prominently granulated, and thickly covered with small 
circular pits. (Known only from San Diego. Not seen since originally 
described. ) 
rugosus, p. 240. 
Cycloxanthops novemdentatus (Lockington) 
Plate 37, figure 7 
Xanthodes? novem-dentatus Lockington, Proce. Calif. Acad. Sci., 7, 32, 1877. 
Cycloxanthops novemdentatus Holmes, Occas. Papers Calif. Acad. Sci., 7, 
56, pl. 1, fig. 2, 1900; Rathbun, H. A. E., 10; 180; pl. 7, fig. 10, 1904; 
Weymouth, Stanford Univ. Publ., Univ. Ser., no. 4, 50, pl. 12, fig. 36, 
1910; Baker, Rept. Laguna Mar. Lab., 1, 100, 1912. 
Fig. 142. Cycloranthops novemdentatus (after Holmes). 
Characters.—Carapace wide, slightly convex, flattened behind, punctate and 
anteriorly rugose; front produced, more advanced in the middle than at the 
orbits, with a deep, closed median notch, which may become obliterated above by 
