THE ANNALS '^ 



AND 



MAGAZINE OF NATURAL HISTORY. 



[FOURTH SERIES.] 

 No. 18. JUNE 18G9. 



L. — Observations on tlie Amjyliipoda occurring on the Nor- 

 wegian Coasts. By Axel Boeck. 



[Concluded from p. 340.] 



Amj^elisca, Kr. — The peduncle of the superior antennse, as 

 in the preceding genera, is generally short and thick, but be- 

 comes much elongated in those which Spence Bate has called 

 Tetromniatus and A. Costa Araneoj^s ; this however, is also 

 the case in the genus Aceros, which consequently forms a 

 transition to this. Dana places this genus among the Ponto- 

 poreinaj ; and Spence Bate makes it the type of a distinct sub- 

 family, principally on account of the simple eyes, which it 

 possesses in common with Lilljeborg's nearly allied genus 

 HajyloojJs. In reality these two form a closely united group, 

 well distinguished from the preceding, and the species of which 

 are very nearly related and difficult to distinguish. They 

 nevertheless agree very closely with the preceding genera in 

 the form of their ovigcrous and respiratory lamellEe. A new 

 species belonging to this genus is 



A. spinijjes, mihi. — This s])ecies, which is 30 millims. long, 

 closely resembles ccquicornis^ Bruzelius, but differs from it in 

 liaving the second joint of the superior antennie longer in pro- 

 portion ; the fifth joint of the peduncle of the inferior antenna3 

 is only a little shorter than the fourtli, and the number of 

 joints in the flagellum is greater. The second joint of the 

 mandibular palpi is extraordinarily thick. The first two pairs 

 of hands ai'C more strongly armed with setae than in a'quicornis'j 

 the fifth and sixth pairs have the last two joints, which are 

 very long, strongly armed with spines; the second joint of the 

 seventh pair of legs is very long, and tlic fifth is nearly as long 

 as the preceding three together. The nails arc elongate- 

 lanceolate. The two posterior segments of the thorax and the 

 whole of those of the abdomen are keeled. It is not uncommon 



Ann. d' Mag. N. Hist. Ser. 4. TW. iii. 31 



