STALK-EYED CRUSTACEA tol 



I. Lambrus. 



Lamhnis . Leach, Milne Edwards, Miers. 



Carapace equilaterally subtriangulate, convex or 

 depressed, with the lateral margins rounded at the 

 branchial regions, and armed with tubercles or spines, 

 which, on the postero-lateral margins, are sometimes 

 considerably elongated. Rostrum usually prominent, 

 triangulate, and somewhat deflexed. Eyes short, robust. 

 Orbits small and well defined, with a fissure in the 

 superior margin ; the interior subocular lobe is sometimes 

 greatly developed. Internal antennae usually obliquely 

 folded, with the basal joint considerably developed. The 

 basal joint of external antennae is short, dilated, but 

 does not reach the front ; the next joint occupies the 

 interior hiatus of the orbit. Epistome usually transverse. 

 The third joint of external maxillipedes is not produced 

 at its antero-internal angle ; the fourth joint is distally 

 truncated, and articulates with the fifth at its antero- 

 internal angle. The first pair of legs of the male is 

 subequal, and elongated or of moderate length ; the fourth 

 joint and the palm are elongated and usually spinous or 

 tuberculated ; palm trigonous, and armed with a denticu- 

 lated or spinous crest along the superior and the internal 

 margin; fingers short, distally acute, and dentated on the 

 internal margins. Walking legs slender and of moderate 

 length, with their fourth joint sometimes denticulated or 

 tuberculated on the margins ; last joint styliform. 



The abdomen of the male covers the sternum between 

 the base of the fifth pair of legs, and is five or six-jointed, 

 with two or three of the intermediate segments soldered 

 together. 



Range. — Mediterranean Sea. Atlantic and Pacific 



