656 



THE AMERICAN XATrRAlJST [Vol. XL 



iPwc. r. S. Xaf. Mu,s., ^o\ 2s, (j... K) 4:>, Pro- 

 fessor WiUoii sax^ of my specimen, it i. -tlie (ir.t instance (m 

 record where one has heen ohtained in its free hal)itat." ^Fhe 

 capture proNc. hi. inference lhal the niet.iMaunuus i. tVee-su im- 

 mhio'. n.>\vever, even the ovnus cannot he positively i.ieiuified 

 since ProiV-.o!- WiUou's metananplius i. tlu' onh one a. x et r.'coo- 



xer.N like nn specimens and nuist l.elon.u to the ( aliuid.e rather 

 than totherorvcaM.he.) 



LenothO.lvJnun.; hreadth O.L57 mm. 



The cara|)acc is moderately slender and is marked near the 

 middle hy a sliolit notch on each side {F\^. 1()). In front of these 

 notches lie the eyes, the two pairs of antenna\ the protrusive 

 toothed proboscis, the maxilla ( ?), and two maxillipeds. There 

 seems to V)e a groove or depression in the dorsal surface of the 

 cara[)ace which runs backward from the front almost to the eyes. 

 The ruby-red eyes are fused and lie just in front of the notches of 

 the carapace. The first antenna (Fi^. 22) arises some distance 

 from the anterior end of the carapace and passes forward to its 

 tip, then turns backward and downward towanls its oriniii, and 

 finally outward. The first jiortion seems to consist of two jonit.: 

 a basal joint which is not c-learly marked otf from the carapace 

 and uhich bears at its outer distal anulr a Mn.nu .pine, and a dis- 

 tal joint ^^]uih i- ahont tv ,< r the lenuth <.f the hr^t. The .second 

 p<,rtion 1. formed of tuo loinf. a lonu onr uhi( h bears two bristles 



pace (outer siilei into a lon<>- bristle, llie distal juirtion of the 

 antenna is a sin<,dt' joint wliich seems to be held almost at right 

 anjrles to the .a^ittal axis of the metanauplius. Its end bears 

 ten or tuehe or n.oie bn.tle.. nuM of ^^WuU are loni; and all 



tli.-r of t!ic h,.t antenna The n.nu" lai,' 'iV''lL'lT'!!i.d 



-riH" outer .amu. i. 2-i<,int<-d V'll\m!xnn7 joiiu '^I'ldeir-k 

 s^^ollen at the ba.e l.ut tapers di.taiU. The .h.tal loint i. a hook 

 swollen at the l)ase. 



