EUROPEAN rORMS OF THE CIROLANIN^. 367 



Remarks. — E. pidohra is easily distinguished from all other 

 European species — E. affinis to a certain degree excepted — by 

 the shape and armature of the posterior margin of the abdomen ; 

 from E. affinis it is easily separated by haviiig moderately large 

 processes on the epimera of the sixth segment. More than 120 

 years ago Slabber described and figured a Eurydice, " Agaat- 

 Pissebet (Oniscus Achatus)," which may be this species, and 

 therefore some few authors call it E. acJiata, Slabber, while 

 most writers adopt the denomination given by Leach in 1815, 

 E. pulchra. It is rather probable that both Slabber and Leach 

 examined the species described as E. pulchra in the preseat 

 paper ; but uafortunately I am not able to prove it in either case, 

 as the distribution of E. affinis, n. sp., is too imperfectly known, 

 and the old descriptions are insufficient for deciding the question ; 

 Slabber's original paper — the Dutch edition — is, besides, unknown 

 to me. For these reasons and in order to preserve, if possible, 

 the name used in almost the whole literature, I adopt the 

 denomination E. pulchra, Leach. 



5. EuRTDiCE AEFiNis, n. sp. (PI. 35. figs. 2 a-2 Jc.) 

 Male and (?) adult female. 



Process of clypeus of considerable size, seen vertically from 

 below covering the major portion of the area between the 

 mandibular palps. 



Antennulae reach scarcely to the anterior lateral angle of 

 thorax. — Male : Peduncle with the second joint somewhat 

 thickened, third considerably thickened, but scarcely longer than 

 the second. Flagellum clumsy ; first joint thick, somewhat 

 elongate, as long as the combined length of the two distal joints 

 of the peduncle and more than twice as long as that of the four 

 distal joints of flagellum, furnished with numerous rather short 

 sensory hairs; second joint thicker than long and longer than 

 the third ; terminal sette short. — Female : Peduncle of normal 

 moderate thickness ; its third joint much longer than the second, 

 and much longer but considerably more slender than in the male. 

 Flagellum rather slender ; first joint considerably shorter and 

 much more slender than in the male, not longer than the third 

 joint of the peduncle, and less than twice as long as thefollowing 

 joints combined, furnished with rather few sensory hairs ; second 

 joint longer than thick. 



Peduncle of antennse with the penultimate joint about half as 

 long as the terminal one. 



