142 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



CARCINOPLAX ANGUSTA, new species. 



4 



Type-locality. — Near Marinduque Island: Tayabas Light (outer), 

 N. 53° W., 18.7 miles; lat. 13° 42' 50" N.; long. 121° 51' 30" E.; 

 90 fathoms; gy. m., s.; March 2, 1909; station 5376, Albatross; one 

 female type, one male juv. 



Type.— Cat. No. 46166, U.S.N.M. 



Dimensions. — Type female, length, 23.8 mm.; width of carapace, 

 27.6 mm.; width between outer angles of orbit, 18.7 mm.; width of 

 front, 9.8 mm. 



A very narrow species. Carapace suboct agonal, the orbits being 

 so oblique that they are almost in line with the adjacent antero- 

 lateral margin, and the postero-lateral margins being not far from 

 parallel. Carapace very convex, regions scarcely indicated, granu- 

 lation fine and even, depressed, the granules trending forward. 

 Margin of front faintly bilobed, each lobe slightly concave; corners 

 broadly rounded; a notch above the antenna where the front joins 

 the orbital margin. Upper margin of orbit nearly straight, the 

 sulcus at its middle small but well marked; a small scallop at the 

 outer angle; lobe at inner lower angle occupying half the lower 

 margin of the orbit and very large and prominent. On the lateral 

 margin of the carapace a small blunt tooth or large tubercle followed 

 at a short distance by a very slight obtusangled tooth almost imper- 

 ceptible; the distance from the orbit to the first tooth is greater 

 than that between the two teeth. Behind the second tooth the 

 margin is somewhat sinuous. 



The margin of the epistome is cut into six scallops. 



Chelipeds short and stout; merus with a short spine or tooth on 

 upper margin: carpus large, with its inner angle swollen and tipped 

 with a stout blunt spine. While the merus and carpus are granu- 

 lated, the chelas are smooth except for a low granulation on the 

 upper surface. The larger palm, measured on its upper margin, is 

 but little longer than its greatest height; a short, blunt tooth at end 

 of upper margin; the fingers fit close together when shut, and cross 

 considerably behind the tips: the brown color runs two-fifths the 

 length of the dactylus, not so far on the fixed finger, but on both 

 fingers the color extends further on the prehensile edge; above the 

 lower margin of the immovable finger and extending back on the 

 palm there is a deep groove. The length and height of the smaller 

 palm are subequal, otherwise that chela is similar to the other. 



Legs slender; the propodus of the last pair is considerably en- 

 larged; this does not show on the right leg, which is abnormally 

 reduced; last three segments moderately hairy. 



In its narrow carapace this species resembles C. bispinosa but 

 differs in its antero-lateral projections being bluntly dentiform in- 

 stead of sharply spinose, in the orbits being oblique instead of trans- 



