NO. 1162. BRA CHYURA COLLECTED B Y THE ALBA TROSS—RA THB UN. 611 



twelve smiiller ones, lorining- siibtrian^iilar patches, with the large 

 tubercle ou the anterior inarj;ii». The median gastric clnster is similar, 

 with the addition of three small tubercles in front of the triangle. The 

 {interior l)ran<']iial (duster consists of two or three coalcscetl tubercles, 

 anterior to which there is a line of from eleven to fourteen tubercles 

 extending obli(iuely bacikward and outward. The lateral gastric clus- 

 ters have a larger (lentral tub«M'cle wiMi about eight posterior and 

 lateral smaller tubercles, and anteiiorly a double arcuate row contain- 

 ing about fourteen tubercles. Hepatic region smooth. Anterolateral 

 margin lodged with i)romincnt tuber(!les, which form about thiiteiMi 

 shallow lol)(^s, Posterolateral margin very (ioncavc^ the antiM'icu- i)or- 

 tion thickened and bearing a double row of tubercles. The tooth near 

 th(^ l)0steri<)r margin is much more i)ronounced than in //. cliilensis of 

 etpial si/e. 



Front advanced considerably beyond the outer orbital angles, trun- 

 cate, thickened, having a double row of depressed tubercles and a 

 shoit closed median fissure. The suborbital region is similar in shape 

 to that of //. chilcnxis, although its lower margin in a front view is 

 more strongly arched. The abdomen of the male is narrower than in 

 ehilensis ; the second segment has a transverse row of five to seven 

 tubercles, the thir<l a, transverse row of six tubercles, the fourth segment 

 a low of four less prominent; on each of these segments there is a 

 tubercle at the outer distal angle; flfth and sixth segments with a 

 transverse ridg(^ terminating at eitlu'r end in a low tubercle. Although 

 the third, fourth, and (ifth segnients of the abdomen are anchylosed, 

 the divisions between them are iiulicated by deep grooves. Sternum 

 coarsely tubciculat(5. 



The live inferior rows of tubercles on the outer surface of the propodus 

 of the chelipeds are composed of large tubercles, bringing the rows 

 nearer togi^ther than in related species. On the siiperior margin there 

 are four teeth, the two i)roximal being the larger. The pioixxlal joints 

 of theand)ulatory legs are shorter ami broader than in //. rliilcn.sis nud 

 II. /iossmanni ; dactyli densely i)ilo8e. 



Color. — The (solor of the two specimens of this species dilTers 

 markedly. In one there are rod lines enciircling round or oblong areas, 

 which touch one another; in the other the lines border narrow stripes, 

 forming transversely arcuate bands across the caiapace, except on the 

 ])o.sterior portion, where tln^ patches are more irregular. The speci- 

 mens have been too long in alcohol for one to determine whether the 

 space inclosed by the red lines is the same color as that without or )u)t. 



/ >i mentions.— Mii]e: Length, 17.(J mm.; width, 22 mm. Male: liength, 

 10.7 mm.; width, 20.2 mm. 



Ti/pes.—i^o. 21 597, U.S.N.M. Two males. Off Abreojos Point, Lower 

 California, 5A fathoms, station 2835. 



