530 PR0CEEDIJVG8 OF THE NATIONAL MUSEUM. vol. 50. 



Relationship. — Very near P. wyville-thomsoni Wood-Mason and 

 Alcoek ^ which is, I think, distinct from P. wyville-thomsoni Miers ^ 

 and may be called Platymaia alcochi. In P. alcochi the branchial 

 regions come very close together and in the young almost meet ; in P. 

 hartschi they are fairly distant. In P. alcochi the rostral horns are of 

 equal length, in P. hartschi the middle horn is much the longer. In 

 P. alcochi the manus is three times as long as high ; in P. hartschi, 

 twice as long as high. In P. hartschi the ambulatory legs are shorter 

 in relation to carapace length than in P. alcocli; the dactyli of the 

 last three pairs are narrower in their distal half than in alcochi and 

 the horny tips more elongate; while the dactylus of the first pair is 

 shorter in proportion to the propodus than in alcochi. 



PLATYMAIA REMIFERA, new species. 



Type-locality. — Between Cebu and Bohol: Lauis Point Light, N. 

 27° E., 17.8 miles; lat. 9° 58' 30'^ K; long. 123° 46' E.; 175 fathoms; 

 gn. M. ; temperature 54.5° F. ; March 25, 1909 ; station 5419, Albatross. 



IIolotype.—Mii\Q. Cat. No. 47156, U.S.KM. 



Measurements. — Length of carapace, 51.5; width of same, 52; dis- 

 tance between tips of outermost spines of orbit, 25,2; length of 

 cheliped, 94; of arm, 36.2; of manus (upper edge), 30.4; height of 

 manus, 18; length of first leg, 232; merus, 85; propodus, 78.5; dac- 

 tylus, 41.6; length of second leg, 222; merus, 88; j)ropodus, 61.2; 

 dactylus, 50.5; length of third leg, 210; merus, 79; propodus, 55.4; 

 dactylus, 48.3; length of fourth leg, 194; merus, 72.4; propodus, 51.3; 

 dactylus, 45.5 ; greatest width of dactylus, 3.3 ; greatest width of dac- 

 tylus in distal half, 2.7 ; width of merus at middle, 5. 



Closely allied to P. hartschi., but smaller. Carapace wider, the 

 width being somewhat greater than length. Front broader at base 

 and less advanced, lateral horns more ascending, median horn curved, 

 concave above. The several dorsal spines are placed similarly to 

 those of hartschi; but the cardiac spines are farther apart than in 

 that species and are nearer to the posterior of the gastric spines; 

 lateral gastric spines farther apart, and there is no second pair in 

 front of them and near the orbit, as is the case in equal-sized speci- 

 mens of hartschi. 



Eyes similar to but smaller than those of hartschi. 



Only one spine of good size on the subhepatic and one on the sub- 

 branchial region. 



Chelipeds similar to those of P. hartschi, but the manus is highest 

 at a greater distance from the fingers. Legs longer and narrower 

 than in hartschi, those of first pair 4J times as long as carapace; 

 propodi twice as long as dactyli. Propodi and proximal part of 



1 Deep-Sea Krachyura Investif/ator, 1800, p. 46. 

 -Challcnoer Ropt., Zool., vol. 17, 18SG, p. lO, pi. 2, fi!,'. 1. 



