556 PROCEEDINGS OF THE NATIONAL MUSEUM. vol 50. 



segment has a concave, nonlobed, outer margin, the carapace is 

 less high in the middle and the two posterior spines are nearer to- 

 gether. L. sinensis is also near L. tuberculatus,^ the latter having a 

 similar basal antennal segment (judging from figure 2, cited), but it 

 also has a postocular cup like that of edwardsii. 



Family PAETIIENOPID.^. 



PARTHENOPE (RHINOLAMBRUS) RUDIS, new species. 



Type-locaUtij. — Tawi Tawi Group, Sulu Archipelago: Observation 

 Island, K 70° W., G.4 miles; lat. 4° 58' 20" N. ; long. 119° 50' 30" E. ; 

 9 fathoms; Co.; Feb. 24, 1908; station 5165; Albatross. 



Eolotype.— Male. Cat. No. 48246, U.S.N.M. 



Measurements. — Length of carapace, 29.6 ; width of carapace, 29 ; 

 length of manus, on outer margin, 37.2; length of dactylus of 

 cheliped, 16 ; length of first ambulatory leg, 50.2. 



The specimen has only one cheliped, the left. The species is a 

 striking one, as all the spines and lobes are stout, thick, and bluntly 

 rounded at the tip; the furrows of the carapace are deep; and the 

 legs are unusually long and with little ornamentation. 



Carapace high, the hepatic and cardiac regions bounded by deep 

 furrows and the front coursed by a broad and deep channel leading 

 back to the gastric region; two other grooves cross the branchial 

 region and inclose an oblong area armed with two spines, of which 

 the posterior is longer and less stout; cardiac lobe somewhat com- 

 pressed from front to back and surmounted by a tubercle, which is 

 a little more elevated than the branchial spines; at the middle of 

 the posterior margin there is a large tubercle or spine pointing 

 obliquely upward and backward. All the elevated portions of the 

 carapace are covered with rather large tubercles and pits, which give 

 them a somewhat worm-eaten appearance. There is a large pre- 

 orbital tubercle directed forward, which does not interrupt the 

 margin of the orbit. Front deflexed at an single of 50 degrees, edge 

 thick, crenulate, tip rounded and partly broken. Orbit with 8 or 10 

 denticles on inner margin and 5 teeth on outer margin between upper 

 sinus and antenna. Postorbital constriction strong, the sinus broad 

 and rounded; hepatic projection forming almost a right angle, blunt; 

 branchial margin rounded, furnished with 8 low tubercles, the last 

 one a little removed and post-lateral, the sixth and seventh confluent, 

 posterior margin with 2 tubercles each side of the middle spine. 

 Subbranchial region flat and Avith a row of tubercles below the 

 margin and parallel to it. 



1 Paramithrax tuierculatva Whitelegge, Mem. Austral. Mus., vol. 4, 1900, p. 146, pi. 34, 

 figs. 1 and 2. 



