555 



to form the type of a separate subfamily Leptocheirince, comprising also the 

 gerras Goes'ia of that author. It is, however, undoubtedly nearly related to 

 the genus Protomedeia of Kreyer, and cannot therefore properly be separated 

 more than generically from the latter. The genus is chiefly distinguished by 

 the form of the anterior pairs of coxal plates, the strongly built urosome, 

 and the structure of the gnathopoda. Besides the typical species and that 

 described by Stimpson as Ptilocheirus pmguis, the Protomedeia guttata of Grube 

 and the Protomedeia pectinata of Norman belong to this genus, and M. 

 Chevreux has recently described another species from the French coast as 

 Ptilocheirus trier istatus. To the fauna of Norway belongs but a single species, 

 to be described below. 



9. Leptocheirus pilosus, Zaddach. 



(PI. 197). 

 Leptocheirus pilosus, Zaddach, Synopsis, Crust. Prussic. p. 8. 



Syn. : Protomedeia pilosa, Sp. Bate. 



Protornodeia hirsutimana, Sp. Bate. 



Boeckia typica, Malm. 

 Ptilocheirus hirsutimanus, Chevreux. 



Ptilocheirus pilosus, Meinert. 



Body rather stout and somewhat compressed, though the back is 

 broadly rounded; urosome very strongly built, and quite smooth above. 

 Cephalon fully as long as the first 2 segments of mesosome combined, and 

 somewhat attenuated in front, with the lateral corners very small and 

 rounded. First pair of coxal plates extremely small and quadrangular in 

 form, with the anterior corner somewhat produced; 2nd pair very large and 

 broad, being greatly expanded distally, so as completely to conceal the 1st pair, 

 their rounded anterior corner advancing even beyond the postantennal corner 

 of the cephalon, distal edge gently curved and setiferous. The 2 succeeding 

 pairs oblong quadrangular in form, and nearly twice as deep as the corre- 

 sponding segments; 5th pair with the anterior lobe very deep and linguiform; 

 the 2 posterior pairs small. Last pair of epimeral plates of metasome forming 

 at the lateral corners a rounded lobe slightly crenulated at the edge. Eyes 

 small, rounded, pigment dark. Superior antennae not nearly attaining half 

 the length of the body, 1st joint of the peduncle a little longer and much 

 thicker than the 2nd, flagellum slightly exceeding the peduncle in length, 

 and composed of about 1C articulations, accessory appendage very fully 



