oniscoidea. 737 



minis longitudine, ramo majore fere duplo longiore quam minor. An- 

 tennarum flagellum subulatum, 7 -10 -articulatum. 



Body shining, narrow elliptical, rounded in front. Abdomen abruptly 

 a little narrower than thorax, oblong, second segment very short, 

 last not longer than penult. Head a little shorter and narrower 

 than next segment. Caudal stylets divaricate, nearly as long as 

 abdomen, longer branch nearly twice the length of the other. Fla- 

 gellum of antennae subulate, seven to ten-jointed. 



Plate 48, fig. 7 a, animal, enlarged; b, antenna; c, extremity of 

 antenna ; d, maxilliped ; e, maxilla of second pair ; /, extremity of leg 

 of seventh pair ; g, caudal stylets. 



In damp woods, under rotten stumps and trunks of trees, near 

 Nassau Bay, Tierra del Fuego. 



Length, four lines. Colour, dirty brown, a little clouded. The 

 head is transverse, and arcuate less behind than before. The first 

 three thoracic articulations are convex backward ; the last two convex 

 forwards. Lateral margins of thoracic segments finely serrulate, with a 

 few minute spinules at intervals. Last joint of base of antennae longer 

 than preceding and a little shorter than flagellum ; posterior margin 

 very minutely and evenly spinulous ; anterior margin with four or five 

 short spines. Claw of legs short and more or less spinous. In 

 the posterior pair, the outer or superior margin of the fifth joint 

 is finely pectinated for a part of its extent ; on the inner side, ad- 

 joining the base, the joint is enlarged and villose, and there are a few 

 short spinules beyond. The pectination on the dorsal margin of the 

 joint is seen only with a high magnifier, and is often not visible in 

 dried specimens. 



Styloniscus longisttlis. 



Corpus angusto-ellipticum, antice" rotundatum. Abdomen thorace subito 

 angustius, subquadratum, latitudine parce longius, articulis sex sub- 

 cequis. Segmenta tJwracis subcequa, anticum parce longius. Styli 

 caudales elongati, basi oblongo (dimidio abdominis longiore) crasso, 



185 



