HYPEIUDiE. 3(JO 



the superior anlennsv. Eyes deeply imbedded, rouiidisli. Siipo- 

 rionmleniue sliort, tumid; peduncle short ; ilagellum uniarticuhite, 

 spiiuUe-shaped. Interior antenna) posterior to the superior, being 

 also slighter and shorter ; liagellum not longer than the last joint of 

 the peduncle. Gnathopoda styliform. Pereiopoda tenninatiug in a 

 shai-p, straight dactylos. Three anterior pairs of pleopoda, like all 

 the rest of the animal, without hairs ; three posteriui- ])au-s of 

 pleopoda biramous, styliform. Colour hyaline, with a few dark 

 specks, especially along the inferior edges of the segments of the 

 pleon. 

 " Length -l-th of an inch. 



" JIah. Mauritius, or on the way from Europe." — Templeton, 



Mr. Templeton thinks this species may be Erythrocephahis melan- 

 ophthaJmus of Tilesius (Xeue Ann. Wetterauisch. i. p. (!. pi. 21 a. f. .5), 

 and states his inability to allot this animal to its ])roper ])\m-v in 

 the order ; but I have httle doubt that his figm-e is an imjicrfect 

 representation of Vihiliu, and probably the young of some kno^vn 

 species. 



4. CYLLOPUS. 

 Cyllopus, Dana, U, S. Explor. ExpeiJ. p. 990. 

 Cephalon transversely ovate. Eyes filling the entire cephalon. An- 

 tenna; distant : su2)erior pair near the dorsal surface, having the 

 flagellum uniarticulate, tapering to a point : inferior pair near the 

 oral surface, slender, having the flagelliun more or less articulated. 

 Fifth pair of pereiopoda rudimentary. 



This genus, with the exception of the above-enumerated jjoints, 

 bears a near resemblance to Vibilia ; but these differences are suffi- 

 ciently important to separate the genera from each other. Had they 

 been tound associated, they miglit have been supi)osed to be sexually 

 related. 



1. Cyllopus MagcHanicus. (Plate L. fig. 1.) B.M. 



Cvllopu3 Magellauicus, Da/ia, U. IS. Exjilor. Exped. p. 990. pi. 68. 

 ■fig. 1. 



Cephalon nearly round. Eyes large ; pigment black, almost filling the 

 entire cephalon. Superior antenna) longer than the cephalon ; 

 peduncle short; flagellum tapering to a sharp point. Inferior 

 antenna) longer than the superior, very slender. Mandible having 

 an appendage, of which the second joint is the longest. First pair 

 of gnathopoda not having the inferior margin of the carpus pro- 

 duced ; propodos minutely serrated ; dactylos straight, minutely 

 eerrated. Second pair of gnathopoda having tlie caipus infero- 



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