IITPERIDJE. 296 



original dcscribcr of the species, Colonel Sabine, — being, I believe, 

 the identical spi>cimens from which he di'cw up his description in the 

 Appendix to ' rarry's First Voyage.' 



3, Hyperia Medusarum. (Plate XLIX. fig. 1.) 



Oiiiscus Medusarum, O. I'dbn'cius, Faun. Grihd. p. 355. 

 Metoechus Medusuruin, Kroi/fi; Griinl. AtnJ'ip. p. GO. pi. 3. f. 15. 



Edicarch, Hist, dcs Crust, ill. p. 78. 



niute, Cat. Crust. B. M. 1&A7. 



Cephalon ovate, not much deeper than broad. Superior antennaa 

 not so long as the cephalon ; fii-st joint of the peduncle long, 

 second and third rudimentary; flageUum three times as long 

 as the peduncle, slender, tapering to an acute point, smooth, 

 sho^\'ing no traces of articulation. Inferior antenna) not longer 

 than the superior, last two joints only exposed ; peduncle not 

 reaching as far as the peduncle of the superior paii- ; flagoUum 

 about four times as long as that of the superior, fringed with a 

 few distantly scattered ciUa. First pair of gnathopoda short and 

 robust, having the meros infcriorly produced and tipped anteriorly 

 ■with a few stiff hairs : carpus long, broad, and widening anteriorly, 

 being inferiorlj- (but not anteriorly) produced along the inferior 

 margin of the propodos ; anterior margin fringed ■with a few stiff 

 hairs : propodos not more than half the length of the carpus ; 

 superior margin slightly arcuate, and fi-ingod with four or five ecjui- 

 distant haii's ; inferior margin straight, armed with several small 

 denticles : dactylos about half the length of the propodos, slender 

 and sharp. Second pair of gnathopoda havdng the meros inferiorly 

 produced and tipped with a few hairs ; carpus infero-anteriorly 

 produced to quite half the length of the propodos, ha^ving the 

 margin fringed with stiff hairs ; propodos slender, long, rather 

 longer than the carpus, cylindrical, slightly curved, more so on 

 the superior than on the inferior margin ; dactylos .■slender, sharp. 

 Pereiopoda subequal. Penultimate pair of pleopoda shorter than 

 the preceding or ultimate : ultimate pair having the peduncle as 

 long again as the teLson ; rami about half the length of the pe- 

 duncle, serrated. Telson broadly lanceolate. 



Length ^ths of an inch. 



Hah. Greenland {Krayer, Moller). 



The description and figure in this Catalogue are from specimens in 

 the British Museum — soinc^ laltelled " IJanks's Museum," and othci-s 

 stated to ])e from the collection of Dr. Miiller ( White, I. c). 



1 have no hesitation whatever in following the siiggestion advanced 

 by Dana (f/. 6'. /w;^'/o/-. /ia^/jfj. p. 'JS<>)- 'l'b<- dcvclopinont of the 



