DECAPODS 183 



The frontal lobes are strongly oblique, except the outer tooth, which 

 is not strongly marked. 



The third antero-lateral tooth is more produced than the second 

 tooth. 



The carpus of the chelipeds is covered with numerous small irregular 

 pits separated by reticulating lines. 



The upper portion of the hand is pitted and reticulated like the carpus, 

 and has two or more irregular inward-pointing teeth on upper margin, 

 the proximal the larger. 



The color of the fingers does not run back on the palm. 



The carpal joints of the ambulatory legs have on the anterior or upper 

 margin a very thin crest, strongly bilobed. 



The propodal joints are wide, and have a prominent lobe at the prox- 

 imal end. 



Dimensions. Male, length 8.7 mm., width u.6 mm., proportion of 

 length to width i: 1.33; fronto-orbital width 7.1 mm., proportion of 

 fronto-orbital width to width of carapace i : 1.63. 



LOPHOPANOPEUS LOCKINGTONI Rathbun. 

 Plate vii, fig. 7. 



XantJwdes leucomanus LOCKINGTON, Proc. Calif. Acad. Sci., VII, 100, 1877 



(not X. leucomanus, op. cit., p. 32). 



Lophoxanthus bellus A. MILNE EDWARDS, Crust. Reg. Mex., 257, 1879 (part). 

 Lophoxanthus leucomanus HOLMES, Occas. Papers Calif. Acad. Sci., vii, 61, 



1900 (part). 

 Lophopanopeus lockingtoni RATHBUN, Amer. Nat., xxxiv, 137, 1900. 



Distribution. San Diego Bay, California, to Gulf of California. Speci- 

 mens examined from San Diego Bay, 4^ fathoms (Albatross, type local- 

 ity) ; San Diego (H. Hemphill) ; San Diego (Cal. Acad. Sci.) ; Gulf of 

 California at La Paz, 3 fathoms, Mulege Bay, and Port Escondido (speci- 

 mens described by Lockington, op. tit., p. 100, not p. 32). 



The anterior half of the carapace is irregularly roughened ; the obliquely 

 oval granulated patch on the hepatic region is separated from the gran- 

 ules on the adjacent teeth. 



The frontal lobes are slightly oblique, but the outer tooth is well 

 marked. 



The third] antero-lateral tooth is more produced than the second 

 tooth. 



The carpus of the chelipeds is crossed by a few thickened ridges 

 incompletely reticulating, anterior margin having a thick granulated ridge 

 distinctly separated by a deep sulcus from the rest of the carpus ; a large 

 granulated tubercle near articulation with hand. 



