302 PROCEEDINGS OF SOCIETIES. 



PLATE XIX. 



ILLUSTRATIVE OF A PAPER BY J. R. KINAHAN, M. B.— ANALYSIS OF 

 GENERA OF TERRESTRIAL ISOPODA, RECORDS OF BRITISH SPECIES, 

 AND DESCRIPTIONS OF NEW GENUS AND SPECIES. 



Fig. 



1. Poreellio cingendus, much enlarged. Tail appendages as in Pig. 4. 



2. Head and first cephalo-thoracic ring of P. cingendus. 



3. Ditto, ditto, P. pruinosus. 



4. Fifth and sixth abdominal rings of P. cingendus. 



5. Ditto, ditto, P. pruinosus. 



6. Back view of head of P. cingendus. 



7. Ditto, P. pruinosus. 



8. Abdominal false feet of P. cingendus. a, Peduncle, b, Accessory- 



lobe, c, Ischium. /, Accessory filament. 



9. Tige of external antenna of P. cingendus. 



10. Front view of head, and side view of orbit of Oniscus murarius. 



a, Line of front, b, Lateral lobes, c, External antennae. 

 d, Transverse suture. 



11. Peduncle of external antennae of 0. murarius. 



12. Abdominal false feet of 0. murarius. (References as in Fig. 8.) 



Vide page 258. 



