76 Canon A. M. Norman on 



traced in the young *. Head with depressed region of the 

 prosepistome not large, but its central process greatly pro- 

 jecting in the form of a conspicuous quadrangular lobe, bent 

 upwards distally, and extending forwards far beyond the 

 lateral lobes. Antennas with the joints of the flagellum sub- 

 equal in length. Telson or pleotelson much longer than wide, 

 tapering with concave sides to an obtusely rounded extre- 

 mity. Uropods having the exopodite much longer than 

 broad ; endopodite slender and straight, not so long as the 

 exopodite. Colour grey or somewhat plum-coloured, marked 

 on each segment with three or five pale spots ; more rarely 

 uniformly grey. 



Length 15 millim., breadth 7 millim. 



The Rev. T. R. R. Stebbing has recorded this species 

 from Leigh Woods, near Clifton, and Tunbridge Wells. I 

 myself took it at Cheddar Cliffs, Somerset. Other specimens 

 in my collection are from Bayonne {A. M. N. 1880), Biarritz 

 (A. Dollfus), Rome (Copenhagen Mus.). 



Armadillidium depression, J. F. Brandt. (PI. VI. figs. 9-12.) 



1830. Armadillidium depressum, Brandt, in Brandt and Ratzeburg, 

 Arznei : Thiere, vol. ii. p. 82, pi. xiii. figs. 4, 5, 6, C, D. 



1833. Armadillidium depressum, Brandt, Conspec. Monog. Crust. 

 Oniscod. p. 24. 



1885. Armadillidium depressum, Budde-Lund, (8) p. 63. 



1892. Armadillidium depressum, A. Dollfus, (9) p. 17, fig. 25. 



1895. Armadillidium dejvessum, Stebbing, (7) p. 22. 



Body shining, densely punctated; a series of depressed, 

 elongated, wavy, obliquely placed tubercles are on each side 

 ot the segments at some distance from the centre ; these 

 tubercles are often obscure, and always most evident on the 

 earlier segments ; between these rows of obscure tubercles 

 the centre of the segments is usually smooth, but below them 

 the sides bear scattered granules. Head with the depressed 

 region of the prosepistome extended considerably forwards in 

 the central portion, forming a wide and conspicuous upturned 

 lobe, the sides of which are oblique and form a sharp angle at 

 their union with the upward sweep of the lateral processes, 

 which do not reach nearly so far forward as the central lobe. 

 First segment of the perseon expanded in front and extending 

 beyond the head. Flagellum of the antennas with the two 

 joints of equal length. Pleotelson slightly longer than wide, 



* These tubercles are similar in character to those of A. depressum ; 

 but whereas in that species the flattened tubercles are more pronounced 

 than in this, especially on the first two segments, in A. nasatum they are 

 less pronounced, but more equal on all the more posterior segments. 



