44 AMPniPODA NOEMALIA. 



apex. Propodos of second paii- large, subovate, flattened below, 

 and villous ; palm a little depressed, nearly straight ; finger rather 

 long. Last four pairs of pereiopoda subequal ; setae few and very 

 minute, not as long as half the diameter of the sixth joint ; poste- 

 rior apices of fom-th and fifth joints prolonged and setulosc. 

 " Length about -^ths of an inch. 



''Hab. Sea-shores near Valpai'aiso, and also those of the island of 

 San Lorenzo, Peru." — Dana. 



15. Allorchestes gracilis. (Plate VII. fig. 3.) 



Allorchestes gi'acUis, Dana, Proc, Amer. Acad, Sci. JBost. ii. 205 ; 

 U.S. Explor. Exped. p. 889, pi. 60. f. 5. 



" Antennae very slender ; superior pair twice shorter than inferior, 

 and a little longer than base of inferior ; inferior hardly haK as 

 long as the body ; fiagellum much longer than base, joints oblong ; 

 setae very short, few (not longer than breadth of joints). Propodos 

 of first pair of gnathopoda but little oblong, narrowest at base, 

 somewhat obliquely tmncate at apex ; palm straight, short, hirsute ; 

 cai'pus triangular, below produced and acuminate. Propodos of 

 second pair large, suboval ; palm nearly straight, a few minute 

 tufts of haii-s ; third joint of this pair short and acutely prolonged 

 behind ; the fifth or carpus not produced below in a process be- 

 tween the propodos and fourth joint. Foui'th pair of pereiopoda 

 a little shorter than seventh, the setae few and very short. 



'* Length six to eight lines. 



''Hah. Tongatabu, Pacific Ocean ; in shallow water among delicate 

 sea- weeds." — Dana. 



16. Allorchestes brevicornis. (Plate YII. fig. 4.) 



Allorchestes brevicornis, Dana, Proc. Amer, Acad. Sci. Post. ii. 206 ; 

 U.S. Explor. Exped. p. 893, pi. 60. f. 8. 



"Antennae quite short; the superior not one-foiu'th as long as the body, 

 and the inferior not one-thii'd ; inferior pair ha'STxig the base quite 

 short ; fiagellum longer than base, joints veiy slightly oblong ; setae 

 veiy short, dense, verticillate. Propodos of first pair of gnatho- 

 poda quite small, a little oblong, subrectangular, pixbescent below ; 

 apex transversely truncate, slightly excavate, lower apex acute 

 and a little prolonged. Propodos of second pair narrow ovate, 

 rather small, apex narrow, with a few tufts of shori setae below ; 

 finger short, not half as long as propodos, nearly longitudinal; whole 

 palm depressed, straight ; cai-pus veiy short, transverse, produced 

 below. Four posterior paii"s of pereiopoda equal, setae minute. 



'' Length five lines. 



"■ Hah. Along shores of the Bay of Islands, New Zealand." — Dana. 



