4 PROCEEDINGS OF THE CALIFORNIA 



gin of orbit a long thick, sinuate tubercle. Teeth of front, upper and under 

 margins of orbit, and a small tooth just external to the outer hiatus of the 

 orbit, red, smooth, shining, and naked. The remainder of the upper surface 

 of the carapax thickly tomentose. Autero-lateral margin with three sharp 

 teeth projecting beyond the tomentosity. Eegions of carapax distinct. Cheli- 

 peds tomentose, the carpus and manus covered with tubercles arranged in reg- 

 ular series on the outer side of the manus. Right cheliped larger than left; 

 fingers sulcate. Tubercles of manus and carpus red, the red predominating 

 at the distal end of the manus. Longer hairs scattered at intervals among 

 the tomentosity of the carapax; hinder limbs thickly jjilose. 



Localities, San Jose Island, Amortiguado Buy; and Port Escondido, both 

 in the Gulf of California. 



Several specimens. The largest pair measure as follows : 



M. M. M. M. 



Greatest length 19 15 



Greatest width 27 20 



No. 4:3. Male and female, in spirits. Fisher and Lockiugton. 



)TttKv\ \'n'Ol^ Xantho tenumaciyJos. nov. sp. 



moV^ cA^i^T-VBAAovk Front declivous,, antero-lateral margin without distinct lobes or teeth, thick; 



jC\.tAA.s. \lel)et> Ijv^*^ anterior portion or carapax somewhat iiegose, granulate; carpus and manus 



Kniv^Kedvuc, thickly covered with large granulations above and externally, the granulations 



1 \^ ^.p extending on to the upper and outer surface of the fingers; fingers sulcate, 



I those of the right cheliped (which is the larger) rather short; those of the 



left cheliped exceedingly long and thin. Hinder legs somewhat tomentose. 



Color reddish-brown ; fingers black. 



One specimen only, a female, taken at low tide, on the flats at La Paz, 

 Lower California. 



M. M. 



Length of carapax 15 



Width of carapax 11 



- kA■\\w\^'^\^^oh(:^; Carapax transverse, antero-lateral angles not prominent. Front four-lobed, 



[Lk.^^ c(t''?.f r c (- *^® central emargination running back as a deep sulcus across the frontal re- 



_ gions of the carajsax. Upper margin of orbit tumid, backed by a deep sul- 



■CtVXXv^ <ci I 5.^ ( I p^^g^ giving off at a right angle, a sulcus separating the median from the lat- 



? c/vJvmK't^ fwi, eral regions of the carapax. Autero-lateral teeth, five; the first two long and 



sA. fvit 5,p('«/e^ low; third low, but somewhat shorter; fourth much shorter and pointed; 



r o 1 It kV\ If a as ^^'-^ ^®^"y small. Areolatiou indistinct; frontal and antero-lateral regions 



1 j /■Lj.j^ granulated. Right cheliped very large, smooth, meros hollowed out through- 



. , . out its posterior upper surface so as to fit closely to the under surface of the 



LJ 7 Ai carapax; carpus large, heavy and rounded; manus broad, rounded above and 



t-c fct<tti.tt?r without crests or tubercles; movable finger with a very large tubercle at its 



inner base; fixed finger with three or four tubercles. Left cheliped similar, 



but much smaller; fingers much smaller proportionately to the manus than 



