OllCUKSTID.T.;. 1.") 



1. Talorchestia gracilis. (Pi-atio II. fig. ').) 



Oi-chestia (Tiiloirhestia) gracilis, Dana, U.S. Exphir. Krprd. p. 861, 



dI. 57. f. 5. 

 Talitrus gracilis, Daiut, Proc. Atner, Acad. Sci. Bost. ii. 201 (female). 



" Female. — Coxcc large ; the fifth pair hardly shorter than fourth. 

 Inferior antenna; much longer than half the body, setae very 

 short (half sliorter than diameter of antenna) ; flagellum much 

 longer than base, joints a Uttlc oblong. Superior antennae about 

 one-third as long as base of inferior. Anterior pair of gnatho- 

 poda rather stout, with quite a »;maU claw, and the ischium, 

 meros, carpus, and propodos subequal. Second pair shorter than 

 first, carpus prominent behind; propodos lamellar, roiinded at 

 apex, nearly naked, concave on anterior side, and having on 

 this margin towards apex a minute dactylos. First pair of 

 pereiopoda much longer than second ; last three pairs gradually 

 increase in length, rather slender, basos of each narrow-eUii^tic, 

 and edged with minute spinules, other joints with very short 

 setae at small inteiTals on the oppo.site sides ; posterior pair 

 of pereiopoda considerably longer tlian fourth, very much longer 

 than those of third ; the setules of the propodos numerous, and not 

 one-third as long on either margin as the diameter of the joint. 



" Male. — Inferior antennae longer than the bodj- ; flagellum a little 

 longer than the base, about thirty-jointed. First pair of gna- 

 thnpoda ■«Tith a small, narrow propodos, the dactylos minute, and 

 acting against the truncate apical margin, and hardly longer than 

 this margin. Feet of second pair having a large ovate hand; lower 

 margin convex, entii'e, and sjiinulose ; finger a little shorter than 

 hand. Carpus minute ; third joint slightly oblong. 



" Length about half an inch. 



" Hah. Sandy shores of a small coral island in the Balabac Passage." 

 (7)f/«rt.) 



2. Talorchestia? Africana, n. s. (Plate II. fig. 6.) B.M. 



Female. — Eyes small. Superior antennae as long as the peduncle of 

 the inferior. Inferior antennae nearlj' half as long as the animal. 

 First ]iair of gnathopoda short. Second pair of gnathopoda long 

 and slender ; propodos cylindiical, and terminating in a round 

 extremity, on the side of which the dactylos articulates rather 

 remotely; the carpus is longer than the propodos, and furnished with 

 a tubercle at the extremity furthest from the animal. The coxae 

 of the third pair of pereiopoda very broad, embracing the width of 

 nearly three segments of the body, and as deep as the preceding. 



Length ^^r^^hs of an inch. 



