232 



NEW GENERA AND HiPF-CIES OF ('KA15S — RATIIBUN. 



rioily ^Yitll a short spino: cardiac and branchial rooions witli irrc.i;ular, 

 lobato tubcrch's arraii.ued transversely, the cardiac tnhercles iu ad- 

 vance of the branchial. Lateral margin, with three inoniinent, obtuse, 

 flattened lobes, the tirst on the hei)atic region ; the first and second 

 M ith their marjiins more or less rioht-aiij^led; the thir<l loiiQand jiromi 

 iient. Kostrnni entire for more than one-fourth its len.<>th; horns sub- 

 cylindrical, contij»u<ms to near their extremities. There is a small but 

 distinct i>ra'orbit:il lobe. The merus of the chelii)ed has three small 

 spines on the iipjier surface, one at the distal end, two near the ])roxi- 

 mal end; otherwise the lejis are unarmed. The ])nlin widens a little 

 towards the lin,ueis, which are gaping' at base. Surface i)ubescent. 



Length of carapace, includiny' rostrum, o~t millimeters; Avidth, '23 

 milliineters. 



Gulf of California; U. S. Fish Commission steamer Alhdtros.s, 1889: 



Pugettia dalli. 



Adult males: Carai)ace subtriiingular, with a tubercle on the intes- 

 tinal region, one large on the cardiac region, and two arranged trans- 

 versely on the gastric region; each of these tubercles is surmounted 

 by a tuft of seta'. There are indications of two tubercles on the me- 

 dian line of the gastric region. Branchial regions Mithout areohitions. 

 There is an upturned spine on the i)ostero-lateral margin. On the he- 

 patic region there is a sh-nder transverse spine, curved slightly forward. 

 The postocular tooth is thin, obtuse, its upper surface llnttened iu a 

 ►smooth oval jdate inclined <b)wnwar<l from the horizontal at an angle 

 of about 45 degrees. IJostral horns moie slender tlnin in riclii, widely 

 divergent. J'rieorbital spine acuminate, llostruiii and lateral margin 

 of tlie bran(;hial region liairy. Chelijx'ds strong; merus liihedi-al, with 

 a ])roininent thin and irregular carina on the nitju'r and inner margins; 

 carpus strongly caiinate aboAc and on the inner margin, the outer and 

 inner surface irregularly ridged: hand large, conii>ressc(l, thin, es])e 

 cially toward the margins; i)alin nearly as l)road as long; tingers gaping, 

 a tooth near the base of the dactyl, and one on the ]»olle\ near the 

 extremity of the gai)e. Ambulatory h'gs mucli more sJendci' than in 

 specamens of lichii of equal size; liist i)air al)out as long as, or longer 

 than, the chelipeds; three succeeding i)airs short, decreasing regularly 

 in length. 



Females: These differ from the adult males not oidy in the broader 

 and m<»re rounded carai)ace, but in the areolations. There ar«' three 

 distinct areolatiiuis covering the branchial region ; the gastric region 



