12 ME. E. J. MIEES ON THE IDOTBID^. 



postero-lateral angles are greatly prolonged and acute ; the ter- 

 minal segment is large and triangular, and, as appears from the 

 figure, is obtusely pointed at its distal extremity. Eyes small, 

 reniform, indigo-blue, placed near the lateral and anterior margin 

 of the head. Antennules half the length of the antennae, three- 

 jointed, and terminating in an attenuated filament (flagellum), 

 whose articulations are indistinct. Antennae corresponding in 

 length to the width of the head, transversely from spine to spine 

 (exclusive of flagellum ?) ; peduncular joints four in number, the 

 last the longest ; flagellum about the length of the peduncle, 

 multiarticulated (joints over twenty in the figure). The epimera 

 are distinguishable in a dorsal view on the three posterior thoracic 

 segments only (in the figure they are large, with acute postero- 

 lateral angles). The three anterior legs project forward, the 

 dactyli being incurved upon the edges of the rather largely- 

 inflated penultimate joints; the four posterior legs are directed 

 backward, and are strongly triangulate, stout, and ponderous, 

 terminating with a slightly curved nail ; tlieir length is nearly equal, 

 but they gradually increase in thickness as they recede towards 

 the tail. The basal joints are large and inflated, the remainder 

 regularly angulate ; the extremities of the articulating joints and 

 edges of the two inferior angles are each provided with a series 

 of tufted and rigid spines. The biarticulated opercular valves 

 are of a triangulate form, each having near its termination a 

 small oval articulation. Colour brown-sepia. Length fiom the 

 insertion of the antennae S^ inches (nearly 90 millim.) ; width 

 1| inch (nearly 45 millim.). 



This gigantic species inhabits the shores of the New South 

 Shetlands. According to Dr. Eights, it inhabits the bottom of 

 the sea, and is only to be obtained when thrown far upon the 

 shores by the immense surges that prevail when the detached 

 glaciers from the land precipitate themselves into the ocean. I 

 have seen no specimens. 



Although distinguished from the arctic species by the non- 

 distinctness of the three anterior epimera, the longitudinal 

 median line of dorsal tubercles, and other characters, it cannot, 

 I think, be regarded as generically distinct. 



GrLTPTONOTus ENTOMOisr. (Plate I. figs. 1 & 2.) 



Oniscus entomon, Linn. Syst. Nat. (ed. xii.) ii. p. 1060 (1766) ; Pallas, 



Spicil. Zool. ix. (fasc. 9) p. 64, pi. v. figs. 1-6 (1772). 

 "? Entomon pyramidale, Klein, Rem. sur les Crustac^s, figs. 1-3," 



