Gen. 1. Ampelisca, Kroyer, 1842. 

 Syn ; Aranfupe, Costa. 

 » Peeudophthalmus, Stiinpson. 

 » Tt'ti'oniiitue, Sp. Bate. 



Body moderately slender and liiglily compressed, with smooth and 

 shining surface. C^ephalon with the frontal part more or less produced, post- 

 antennal corners obsolete. Anterior pairs of coxal plates rather deep and 

 arranged in such a manner, that the posterior edge of each overlaps the an- 

 terior edge of the succeeding one; 1st pair scarcely deeper than tlie others, 

 but more or less expanded distally, and generally (but not always) quite 

 concealing the basal part of the inferior antenuBe, as also the oral i)arts ; 

 4th pair obliqnel}' truncated below the jjosterior angle. Eyes, when present, 

 2 on either side, each generally exhibiting a well-marked circular corneal 

 lens. Antennae very slender, tlicir mutual length different in the different 

 species. Mandibles with tlie budy \fr\- sliort, palp of moderate length, and 

 having the 2nd joint laminarly dilated, the last very narrow and linear. First 

 pair of maxillpe with the masticatory i^lobe transversely truncated and armed 

 with strong spines, basal lobe comparatively small, and witlmut distinct 

 marginal setae, palp well-developed, with the terminal joint gradually expanded 

 di.stally, and armed at the tip with several strong teeth. Second pair of 

 maxillae with the outer lobe larger than the inner, both densely setous at the 

 tip. MaxilUpeds with the basal lobe oval, obliquely' rounded at the tip, 

 masticatory lolje oblong, and reaching about to the end of the antepenultimate 

 joint of the palp, jiennltimate joint of the latter nearly clnb-sha]ied and 

 scarcely half as long as the antepenultimate one. Anterior gnathopoda, as a 

 rule, shorter and stouter than the jiosterior ones, with the propodos more or 

 less dilated in the middle, that of the posterior pair generally very narrow 

 and attenuated distally. The 2 anterior ])airs of pereiopoda with the carpal 

 joint extremely short, dactyhis long and narrow. Tlie 2 succeeding pairs with 

 the basal joint very broad, its anterior edge strongly curved in the middle, 

 car])al joint, with a single series of snmll denticles on the outer side, somewhat 

 within the posterior edge. Jjast pair of pereiopoda with the basal joint 

 obliquely expanded, posterior lobe sliort and broad, with a dense series of 

 ciliated setae on the terminal edge; ])ro])odal joint more or less foliaceous, 

 dactylus lanceolate. Last ])air of uropoda ratlier large, reaching considerably 

 beyond the preceding jiairs, I'ami more or less foliaceous, tlie inner liroader 

 than the outer. Telson oblong and cleft nearly to the base, the incision very 

 narrow, fissure-like. 



Remarkt:. — The present genus was established hy Kroyer as early 

 as 1842, and the name, proposed by that author, has therefore evidently the 



