30 AMPniPODA NOBMALIA. 



meter of the joint ; basos broad, margin minutely serrulate. Outer 

 branch of first pair of stylets naked. 

 " Length, one-third of an inch. 



" Hah. From among floating Fucas, near the shores of Terra del 

 Fuego. Caught with a hand-net. 



" This species resembles the Orcliestki EueJiore of Fr. Miillcr 

 (Archiv fiir Nat. 1848, p. 53, pi. 4) ; but in that the finger of the 

 large hand is shorter, and the palm has an emargination below its 

 middle." — Dana. 



22. Orchestia Chilensis. (Plate V. fig. 2.) 



Orchestia Chilensis, Edwards, Hist, des Crust, t. iii. p. 18. 

 Dami, U.S. Exphr. Exped. p. 868, pi. 58. f. 4. 



Male. — Superior antennoe reaching to the extremity of the penulti- 

 mate joint of the peduncle of the inferior. Inferior antennae 

 scarcely half as long as the animal ; flagellum as long as the 

 peduncle. First pair of gnathopoda having the inferior angle of 

 the palm rounded, scarcely defined ; dactylos as long as the palm. 

 Second pair of gnathopoda ovate ; palm oblique, sj)inous ; a small 

 tooth or tubercle near the base of the dactylos ; dactylos long, 

 bent near the middle. 



" Female. — Coxa? rather large, fifth but slightly shorter than fom-th. 

 Inferior antennae half shorter than the bod}' ; base rather short, 

 last joint of base hardly longer than preceding ; flageUimi a little 

 longer than base, nineteen- to twenty-jointed; joints sparingly 

 oblong, setae very minute. Fii-st pair of gnathopoda shorter and 

 more slender than those of second ; propodos tnuicate at apex, and 

 here a little broader ; dactylos as long as apical margin. Propodos 

 of second pair subspatulate ; dactylos marginal, longitudinal, hardly 

 reaching to apex. Pereiopoda with the setae minute, and rather 

 few ; those of the propodos on its under surface half as long as 

 width of joint ; those on the upper margin miich shorter. Three 

 posterior paii'S of pereiopoda slender ; third considerably shorter 

 than foiu'th ; foiu'th and fifth equal ; coxa) of seventh pair some- 

 what broader than those of preceding." 



Length eight lines. 



Hah. Karoa, New Zealand {M. Jaequinot) ; Valparaiso (Dana) ; 

 coasts of Chili (Echv.) 



The description of the male is taken from specimens entnistcd to 

 me by Prof. M. -Edwards ; that of the female from Dana's work, from 

 wliich also the figure is copied. I have had the opportimitj^ of ex- 

 amining the type, preserved in the Museum of the Jardin des Plantes, 

 from which the second gnathopod (PI. I.«. f. 8) was drawn. 



