OKCaESTID^. 43 



some slight differences between liis figure and that given in this 

 work, but not more than ran be accounted for as arising from dis- 

 crepancies between artists, for wliich some allowance should always 

 be made, particularly where the naturalist is obliged to trust to the 

 skill of those who may not be acquainted with the subject. 



13. Allorchestes verticillatus. (Plate VII. fig. 1.) 



AUorchestes verticillata, Dana, Proc. Amer. Acad. Sci. Host. ii. 205 ; 

 U. S. Explor. Expcd p. 886, pi. 60, mas. f. 2, fern. ? f. 3. 



" Male. — Coxae of moderate size. Inferior antenna) nearly twice longer 

 than superior, about one-thii'd as long as the body ; base short, last 

 two joints of base subcqual ; flagellum about twice longer than base, 

 fourteen-jointed, joints slightly oblong ; setae densely verticillate, 

 short (not longer than breadth of joints). Superior antennae 

 nearly naked. First pair of gnathopoda quite small ; propodos 

 oblong, hardly narrower at base, oblique at apex ; carpus not i)ro- 

 duced below. Second pair of gnathopoda large, subovate ; palm 

 along inferior side nearly straight, pubescent ; dactylos long ; 

 carpus not produced downwards between hand and fourth joint. 

 Third, fourth, and fifth pairs of pereiopoda subecpial, short ; setae 

 few, stout, short, not longer than diameter of joint ; upper margin 

 of propodos naked. Carpus with a seta below. 



''Feviale'7 — First pair of gnathopoda having the propodos in form 

 and size like the male. Second pair of gnathopoda having the 

 propodos a little larger than the first ; it is oblong, rather broad, 

 upper and under sides nearly parallel ; upper very slightly arcuate, 

 and one-third longer ; lower ^vitll three or four tufts of longish 

 seta) ; apex truncate, a little oblique, forming a nearly trans- 

 verse palm, and somewhat hairy; dactylos not longer than the 

 palm, and not half as long as the propodos ; caiinis broader than 

 the mcros ; mcros nearly rectangular. Flagellum of the superior 

 antennae ten- to twelve-jointed ; of the inferior antennae about 

 fourteen-jointed. 



" Length four lines. 



"Hah. Along the shores near Valparaiso." — Bona. 



14. Allorchestes hirtipalma. (Plate VII, fig. 2.) 



Allorchestes hirtipalma, Dana, Proc. Amer. Acad. Sci. Bost. ii. 205 ; 

 U.S. Explor. Exped. p. 888, pi. 60. f. 4. 



" Superior antennae very slender, a little shorter than inferior ; base 

 very short. Inferior pair somewhat shorter than lialf the body ; 

 flagellum more than twice as long as base, lower side densely short, 

 villose, joints not oblong. Propodos of first pair of gnathopoda 

 oldong, smaller at base, finely ciliate below, obliquely tnmcate at 



