no.1766. STALK-EYED CRUSTACEA OF PERU RATHBUX. 553 



DROMIDIA SARRABUREI, new species. 

 Plato is, fig. 4. 



Densely covered with fur except ends of fingers and dactyli; abdo- 

 men partly extended. Carapace high, subglobular, broader than 

 long; antero-lateral margins directed toward the buccal angles and 

 armed with six small teeth or tubercles; from the last tooth an 

 oblique furrow runs across the branchial region. Front vertical, 

 tridentate. Orbits with a tooth above and below; orbits and 

 antennular pits continuous. Maxillipeds protuberant. Chelipeds 

 short, stout, equal; fingers deeply channeled inside, gaping at base. 

 First and second legs broad, dactyli with a curved horny tip and a 

 row of horny spines beneath; third and fourth legs narrower, sub- 

 dorsal and prehensile, third shorter, dactyli strongly curved, fourth 

 one recurved, both folding against a spinous process on the propodus. 



Length of carapace of an ovigerous female 28.2 mm., width 30 mm. 



Type -locality. — Taken in trawl, Bay of Sechura, west of Mataca- 

 balla, depth about 5 fathoms, April 8, 1907. 



"taniarones del Mar." Crab housed in sponge. 



Type.— Cat, No. 40475, U.S.N.M. 



Dedicated to Senor Don Carlos Sarrabure y Correa, Director de 

 Fomento. 



HYPOCONCHA PERUVIANA, new species. 

 Plate 47, fig. 2. 



Covered with a coat of short setae, margins fringed with short hair; 

 abdomen partly extended; dorsal surface fitting the contour of the 

 molluscan valve which it holds over itself. Carapace flattened, 

 membranaceous; length subequal to breadth; anterior margin 

 arcuate, with a slight median incision and notches at the insertion of 

 the antenna?; postero-lateral margins subparallel and forming a 

 sinus behind the lateral angle. Eyes and orbits small, wholly ventral. 

 Antenna? long and slender. Prominences of ventral surface granu- 

 lated. Chelipeds small, equal; wrist and claw granulated; outer 

 face of wrist bordered by fringe of hair; fingers stout, not gaping, 

 tips red. First and second legs stout; third and fourth slender, 

 dorsal, third the shorter, dactyli very short and hooked, helping to 

 hold the crab in place in the shell which it carries on its back. 

 Length of mature female 18 mm., width 19.5 mm. 



Under valve of Chione asperrviw Sowerby. 



Type-locality. — Oyster beds of Matapalo, near Capon, February 3. 

 Type.— Cut. No. 40474, U.S.N.M. 



Near //. digueti Bouvier,'' from La Paz Bay, Mexico, but differs 

 in having a, Y-shaped depression on the gastric region directly in 



" All the mollusks mentioned in this paper were identified by Dr. \Y. II. Dull. 

 l> Bull. Mus. Hist. Nat., Paris, vol. I, L898, pp. 37 1 and 376. 



