540 



spinous. Telson rather large and thick, oval in shape, with a dorsal fascicle 

 of spines on either side of the obtusely rounded, or slightly angular tip. 



Bernards. - This genus was established by Costa in the year 1853, to 

 include the species M. gryllotalpa, described below. The genus Lctnlns of 

 S{). Bate is identical with Costa's genus. It is chiefly distinguished from 

 1lic nearly-related genera Aora and Aufonov by the structure of the anterior 

 gnathopoda in the male, the shape of which approaches a cheliform charader 

 on account of the unusual development of the carpus. This characteristic is 

 still more pronounced in the genus Stimpsonia of Sp. Bate, which is closely 

 allied to the present genus, and should, perhaps, more properly be combined 

 with it. The genus comprises several species from both the northern and 

 southern hemispheres. To the fauna of Norway belong 3 species, to be 

 described below. 



1. Microdeutopus anomalus, (Rathke). 



(PI 191). 

 Gmnmnruft anmnalm, 1'athke, Acta, Aead. Leop. T. XX, p. (5:?, PI. IV, lig. 7. 



Syn : Lembos cambriensis, Sp. Bate. 

 Autonor anomala, Bruzelins. 



Body very slender, nearly cylindrical in form, with the back evenly 



rounded throughout. Cephalon scarcely attaining the length of the first 2 



segments of mesosome combined, lateral corners somewhat deflexed, and rounded 



at the tip. Anterior pairs of coxal plates in female scarcely deeper than the 



corresponding segments; 1st pair forming in front an acute angle, which in 



the male is prolonged to a strong acuminate projection; the 3 succeeding pairs 



evenly rounded at the tip; 5th pair having the anterior lobe nearly as deep 



as the preceding pair. Last pair of epimeral plates of metasome terminating 



in a narrowly-rounded lobe. Eyes small, round, pigment black, with a whitish 



coating. Superior antennae equalling 2 /3 of the length of the body, 1st joint 



of the peduncle nearly as long as the eephalon, and having underneath 



the tip a slender spine, 2nd joint considerably longer than the 1st, 3rd joint 



ill tout Va as long as the 2nd, flagellum twice the length of the peduncle, and 



very slender, being composed of about 22 articulations, accessory appendage 



well developed, nearly twice as long as the last peduncular joint, and 4-articulate. 



Inferior antennae scarcely more than half as long as the superior, the last 2 



joints of the peduncle about equal-sized, flagellum equalling in length the last 



