4G 



AMPnrPODA NOUMALIA. 



Propodos of first pair of gnathopodu ciuite small, oval. Propodos 

 of second pair ovate ; palm a little depressed, and bearing a few- 

 short setae ; dactylos long ; carpus not produced below between 

 propodos and fourth joint. Three posterior pairs of pereiopoda 

 gradual!}- increasing in length ; setae few, minute. 

 " Length three lines. 



" Hab. Island in the Sooloo Sea, off the harbour of Soung." — Dana. 



20. Allorchestes gramineus. (Plate VII. fig. 8.) 



Allorchestes ? gi-aminea, Dana, Proc. Amer. Acad. Sci. Bost. ii. 208 ; 

 U. S. Explor. Exited, p. 897, pi. 01. f. 3. 



" Superior antennae one-third shorter than inferior ; flagellum longer 

 than base, about fourteen-jointed. Inferior antennae not half as 

 long as body ; flageUum moniliform, much longer than base, joints 

 hardly oblong, setae minute. Eyes reniform. Propodos of first 

 pail' of gnathopoda narrow, a little the broadest at middle ; dac- 

 tylos long, stout, folding against under side of propodos. Propodos 

 of second pair quite large, narrow ovate, narrow at apex, lower 

 margin nearly straight, palm not depressed ; dactylos long (longer 

 than half the propodos) ; carpus not produced below between the 

 propodos and the fourth joint. Three posterior pairs of pereiopoda 

 graduaUy increasing in length (last two pairs nearly equal), almost 

 naked. 



" Length six to seven lines. 



" Hah. Rio Janeiro (January)." — Daim. 



21. Allorchestes medius. (Plate VII. fig. 9.) 

 Allorchestes media, Dana, U. S. Explor. Exped. p. 898, pi. 01. f. 4. 

 " Coxae large. Superior antennae longer than half the inferior ; fla- 

 gellum fourteen-jointed, joints sparingly oblong ; setae parti}- very 

 short and divaricate, partly close- appressed, and about as long as 

 the joint. Inferior antennae not half as long as the body ; flagellum 

 longer than the base, sixteen-jointed, joints sparingly oblong ; 

 setae numerous and verticillate, except on outer side, which is 

 naked ; setae hardly as long as breadth of joint. First pair of 

 gnathopoda quite small ; propodos oblong ; margins nearly parallel, 

 below hirsute in part, at apex obliquely truncate ; dactylos shoi-t. 

 Propodos of second pair- quite large, subovate, arcuate above ; palm 

 very obhque, transverse, spinulose, ending in an angle below ; dac- 

 tylos a little longer than half the propodos ; carpus small, not pro- 

 duced below between the propodos and the fourth joint ; fourth joint 



