76 Canon A. M. Norman on 



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

 prf'Pe))islome not large, but its central process greatly pro- 

 jifting in the form of a coiispicuous quadrangular lobe, bent 

 IlJ»^vards distally, and extending forwards far beyond the 

 lateral lobes. Antcnnte with the joints of the flagcllum 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 ; cndopodite slender and straight, not so long as the 

 exoj^odite. Colour grey or somewhat plum-coloured, marked 

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

 uniformly grey. 



Length 15 millim., breadth 7 millira. 



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 {Copenha(]en Mus.). 



ArmadiUidium dtprcssum, J. F. Brandt. (PI. VI. figs. 9-12.) 



1830. Arnwdillidimn (hpressnm, BraucU, in Brandt and Ratzeburg, 

 Arziiei : Tliiere, vol. ii. p. 82, pi. xiii. figs. 4, 5, 6, C, 1). 



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

 Oniscod. p. 24. 



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



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



1895. Ar7nadillidium dqjressum, 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 ^\ hich 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 pera^on expanded in front and extending 

 beyond the bead. Flagcllum of the antcnnaj with the two 

 joints of equal length. Tleotelson slightly longer than wide, 



* These tubercles are similar in character to those of A. dej))'esst<in ; 

 but whereas in that sjiccit's the liattined tubercles are more pronounced 

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

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



