546 PROCEEDINGS OF THE VATIONAL MUSEUM. vol. 38. 



peds small, equal; hands short, rounded. Legs small, slender: dac- 

 tyl] of first three pairs short and deeply bifurcate, of last pair simple 

 and slender. Sternum of male broad and flat; abdomen narrow, 

 three- jointed, lirst and second normal joints being fused, and third to 

 sixth inclusive also fused. 



Width 5 to 6.5 mm. 



Taken in trawl, Bay of Sechura, wesl of Matacaballa, depth about 5 fathom-, April 

 8, 1907. 



Not previously known from Peru. 



Distribution. — Lower California (off Abreojos Point) to Peru. 



PINNIXA TRANSVERSALIS (Milne Edwards and Lucas). 



Plate 46, tig. 1. 



/'i/tnothere.s transversalis Milne Edwards and Lucas, d'Orbigny's Voy. Amer. 

 Mer., vol. 6, pt. 1, 184:1, p. 23; vol. 9, atlas, 1847, pi. 10, fig. 3. 



Carapace high, more than twice as wide as long, oblong, the outer 

 ends inclined downward; a transverse ridge on the posterior part of 

 the carapace. Front narrow, truncate, deflexed; orbits small, oval. 

 Palpus of outer maxilliped very large, with three segments, the last 

 of which is articulated to the inner side of the preceding; both of these 

 are fringed with long hair. Chelipeds equal, with hairy margins; 

 chelae compressed, tapering distally, sparsely gratuitous, two granu- 

 lous and hairy ridges on outer surface and one on lower margin. A 

 line of hair between second and third abdominal segments. 



Width 17 to 22 mm. 



Dredged near northeast side of San Lorenzo Island, depth -\ fathoms, February 5. 

 Taken Erorja a piece of tube resembling the end of a tube of ( 'ha topterus. 



Distribution. From Panama to Punta Arenas, Patagonia. 



PINNOTHERELIA LAEVIGATA Milne Edwards and Lucas. 



Plate 51, fig. 3. 



I " '/ nnatherelia laevigata Milne Edwards and Lucas, d'Orbigny's Voy. Amer. 

 Mer., vol. 6, pt. 1, 1843, p. 25; vol. 9, atlas, 1847, pi. 9, fig. 1. 



Small. Carapace smooth, firm, a little broader than long, sub- 

 root angular, with the corners rounded off, flat except in its anterior 

 portion, which is strongly bent down. Front two-lift lis as wide as 

 carapace; orbits and eyes oval. Outer maxillipeds parallel to each 

 other: ischium distinct from and smaller than merus; palpus very 

 large segment- end to end. Sternum flat, forming an angle with the 

 plane of the carapace. Chelipeds stout, smooth ; palms inflated : lin- 

 gers narrowly gaping. Legs flattened, second longest: meropodites 

 and propodites thickly hairy beneath. 



Width H) lo 12 mm. 



Callao. These casts wore Found on the rooks of the inner Bide of the natural dyke 

 of rubble separating the lagoon at the mouth of the river from the ocean. 



Distribution. Peru : ( Idle. 



