THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY. 



[FOURTH SERIES.] 

 No. 101. MAY 1876. 



XXXI II. — Ampliipodous Crustaceans. On the Genera Ilyale 

 and Anonjx and a neio Species of Probolium. By tlie 

 Rev. T. R. R. Stebbing, M.A. 



[Plates XVIII. & XIX.] 



Hyale Nilssoni and Hyale Ijuhhockiana. 



The late Axel Boeck, in his ' Crustacea Amphipoda borealia 

 et arctica,' unites under Rathke's genus Hyale the Allorcl/estes 

 of Dana and the Nicea of Nicolet. Among the generic cha- 

 racters, he states that the telson is short, thick, and divided. 

 Mx. Spence Bate, on the other hand, in his important and 

 useful British-Museum Catalogue of Amphipodous Crustacea, 

 keeps the three genera distinct — describing AUorchestes as 

 having '' the telson single," Nicea as having the superior and 

 inferior antennae subequal, "the rest of the animal generally 

 resembling AUorchestes^ except the telson, which is deeply 

 cleft (or double?)," and finally assigning to Hyale a simple 

 telson, though figuring that of Hyale pontica as cleft or double. 

 At the same time Mr. Spence Bate expresses his own inclina- 

 tion to classify Rathke'sZTya/e near to Nicea of Nicolet, though, 

 as he had not himself seen a specimen of Hyale^ he felt bound 

 to adopt Dana's arrangement of the genus in the subfamily 

 Lysianassimr. In the ^ British Sessile-eyed Crustacea,' by 

 Messrs. Bate and Westwood, the genus AUorchestes is stated 

 to have " the telson single ;" but there again, by a curious 



Ann. & Mag. N. Hist. Scr. 4. Vol. xvii. 23 



