554 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.50. 



specimen without dorsal branchial spine ; Unapacanensis, however, is 

 a true Blaja, as the movable part of the antenna is quite within the 

 orbit. 



MAJA BISARMATA, new species. 



Type-locality. — Off northern Mindanao: Point Tagolo Light, S. 

 Tl° W., 8.7 miies; lat. 8° 47' N.; long. 123° 31' 15" E.; 182 fathoms; 

 temperature 54.3° F. ; Aug. 9, 1909; station 5519, Alhatross. 



Holotype.—Mi\\e. Cat. No. 48220, U.S.N.M. 



Measurement. — Length of carapace on median line, 20; length of 

 horn, 5.5 ; width of carapace excluding spines, 15.7 ; including spines, 

 18.2. 



Carapace oblong-ovate, covered, as are also the ambulatory legs, 

 with hairs; spines numerous, arranged as follows: Two pairs of 

 small spines between preorbital hoods, followed by three pairs on 

 gastric region (of which the second pair are larger), then one large 

 median, one pair of very small spines, another large median spine, 

 finally a pair near together; two lateral gastric spines on each side, 

 making in all sixteen gastric spines; one small genital spine; two 

 large cardiac spines side by side; three small intestinal spines in a 

 triangle pointing forward; seven dorsal branchial spines of which 

 three are large ; three small dorsal hepatic spines, and two marginal, 

 of which the ^interior is long; three long marginal branchial spines. 

 Rostral horns slender, gradually tapering, acuminate. Preorbital 

 hood armed posteriorly with a rather small, outward-pointing spine, 

 separated by a U-shaped sinus from the larger intermediate spine; 

 this in turn is separated by a V-sinus from the oblique postorbital 

 spine, which has a tubercle near the base of its inner margin. 



Basal antennal segment armed with two anterior spines besides a 

 tubercle at posterior end of outer margin; of the spines, the one at 

 the outer angle is nearly horizontal and directed outward and a 

 little forward, the one at the inner angle subparallel but directed a 

 little more forward and slightly downward. Subhepatic and sub- 

 branchial regions each with several tubercles ; pterygostomian region 

 armed with a very short, stout spine and two tubercles. 



Chelipeds slender, one-third longer than carapace minus rostrum; 

 carpus three-fifths as long as merus; both are finely roughened, and 

 the merus has a small, slender, terminal spine. Palmar portion of 

 manus nearly as long as merus, more slender, smooth ; fingers almost 

 half as long as palm, fingers meeting, without teeth. Ambulatory 

 legs fringed on each side with long hairs, those of first pair very 

 little longer than chelipccl; merus joints each with a terminal spine. 



Relatic/nsMps. — Differs from other species in having a definite 

 number of spines and pointed tubercles, the interspaces being 

 smooth; also in two instead of one cardiac spine. The chelipeds 

 resemble those of M. suluenszs but the carpus is not so long. 



