BY GEO. M. THOMSON, F.L.S. 73'. 



Clypeus, with shorter lobes, sub -triangular, epistome some- 

 what convex, with the superior margin not reaching beyond 

 the front. 



^irst segment of the body with the lateral margin thickened, 

 slightly revolute, somewhat furrowed loDgitudiDally, sub- 

 equally cleft behind; epimera of the second segment cleft, 

 interior part short, toothed ; posterior margin of the first three 

 segments slightly sinuate on both sides. 



Anal segment of the abdomen not broader than loug, con- 

 tracted in the middle, posterior margin nearly straight, with 

 the external angles rounded, nearly straight (?) ; basal articu- 

 lation a little longer than broad, external branch shortest, 

 inserted above the broader internal ; internal branch somewhat 

 shorter than the anal segment. 



Colour, greyish. 



Length, 8 mm. ; breadth, 3*75 mm. ; height, 2 mm. 



The specimen described, which was taken in Tasmania by 

 Dr. Scheyer, is presented in the Berlin Museum. 



A somewhat allied species (A. vulgar e) is described by Budde- 

 Lund as having been collected at Melbourne. 



EXPLANATION OF EiaUEES. 



Plate I. 



Tigs. 1 & 2. Engseus cunicularius. 



1. Eemale, nat. size. (The abdomen is too broad in the 



figure.) 



2. Eostrum (mag.) 



I'igs. 3-5. Gebia simsoni. 



3. Animal, nat. size. 



4. Eostrum, from above x3. 



5. Telson and uropods spread out, x2. 



[Figs. 6-13. Oniscus punctatus. 



6. Eirst antenna, x40. 



7. Second antenna xlO 



8. Eight and left mandibles, x56. 



9. Eirst maxilla, x56. 



10. Second maxilla, x56. 



11. Maxillipeds, x40. 



12. Extremity of abdomen from below (aw-anus) xl9. 



13. Uropod, x26. 



