NO. 2135. NEW PHILIPPINE CRABS—RATHBUN. 549 



on either side is a pear-shaped branchial eminence transversely placed 

 and ending outwardly in a spine; the hepatic region culminates in a 

 conical, acute spine directed outward and slightly upward; of tu- 

 bercles there is one median on the mesogastric region, one at inner 

 angle of the branchial region, and one farther back, behind the 

 middle of the interspace between cardiac and branchial regions; i 

 spine on anterior part of subbranchial region; a row of three ptery- 

 gostomian tubercles. Rostral horns slender, widely separated, mod- 

 erately divergent. Preorbital hood expanded laterally and with an 

 acute tooth anteriorly; postocular cup well developed. Anterior 

 angle of basal antennal segment acute; outer margin with a slight 

 concavity. 



Chelipeds as long as carapace and rostrum; merus armed above 

 with three low tubercles and a terminal spine; carpus with a thin 

 outer crest and two blunt crests; margins of manus blunt, subparallel, 

 length about one and a half times heiglit ; fingers feebly crenate, a 

 broad low^ tooth at the base of the dactyl in a narrow gape. The first 

 ambulatory legs are lacking, but tlie second are about one-fourth 

 longer than the chelipeds. 



Relationships. — This species has orbits similar to those of C long- 

 ipes Dana^ and C. japonica (Miers)-, that is, there is a short, U- 

 shaped sinus between preorbital hood and postorbital cup ; the basal 

 antennal segment also is elongate as in those species. Instead of the 

 numerous spines on the carapace of typical species, C sphenocarci- 

 noidcs has ornamentation on the posterior half similar to that on cer- 

 tain species of Sphenocarcinus^ especially S. luzonUnis (see p. 539), 

 while the tuberculation of the anterior half of the carapace is akin 

 to that of the atypical species of Pugcttla^ e. g., P. nilnor Ortmann.^ 



NAXIOIDES ROMBLONI, new species. 



Type-locality. — Xear Romblon : Romblon Light, S. 56° E., 4.5 

 miles; lat. 12° 38' 15" X.; long. 122° 12' 30" E.; 37 fathoms; hrd. S.; 

 temperature 75.7° F.; Mar. 25, 1908; station 5179, Albatross. 



Holotype.— Male. Cat. No. 48201, U.S.N.M. 



Measurements. — Length of carapace on median line, 7.6; width of 

 carapace, 5; length of rostrum. 7; length of cheliped, 11.7; length 

 of first leg, 19.5 ; of second leg, 15 ; of third leg, 11.5 ; of fourth leg. 9. 



A small, delicate species. Carapace with numerous spines and 

 acute tubercles. Cardiac region most elevated, conical, surmounted 

 by a short, conical spine, and bearing another spine nearly as large 

 on its posterior slope ; there are several tubercles the largest of which 



lAmer. Jour. Sci., ser. 2, vol. 11, 1851, p. 2G9. 



^ Hyastcnus {Chorilia) jaiionicun Miors, Proc. Zool. Soc. London, 1879, p. 27, pi. 1, 

 figs. 2, 2a, 26. 



3 Zool. Jabrb., Syst., vol. 7, 1893, p. 44. 



