I 921 ] 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. 210. 



Cycloxanthops novemdentatus (Lockington) 



Plate 37, figure 7 



Xantlwdes? novem-dentatus Lockington, Proc. Calif. Acad. Sci., 7, 32, 1877. 



Cycloxanthops novemdentatus Holmes, Occas. Papers Calif. Acad. Sci., 7, 

 56, pi. 1, fig. 2, 1900; Kathbun, H. A.' E., 10, 180, pi. 7, fig. 10, 1904; 

 Weymouth, Stanford Univ. Publ., Univ. Ser., no. 4, 50, pi. 12, fig. 36, 

 1910; Baker, Eept. Laguna Mar. Lab., 1, 100, 1912. 



Fig. 142. Cycloxanthops novem-dentatus (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 



