The body is flatter than in the other species and bears tubercles; its colour is a slate-grey with yellowish markings. The first thoracic segment is well developed and the head appears as if almost completely imbedded in it. _BRITISH LOCALITIES:--_ _England_: Clifton, banks of the Avon; (W.M.W. from J.T.C., 1900): Shirehampton, near Bristol; (Stebbing in 49): Clifton; (Dollfus from Miers 14). _FOREIGN DISTRIBUTION:--_ _Europe_: France; Italy; (25): Asia Minor; (14, quoting Brandt). =Distribution of Species.= There are not sufficient records at present to enable us to draw any conclusions as to the general distribution of Woodlice in the British Isles, but it is hoped that more attention will be given to these creatures, and that before long there may be other material available. =Conclusion.= At the beginning it was mentioned that the present work grew out of an investigation into the fauna of Essex, and in order to show what may be expected when places are explored in which no collecting has been done, we may briefly indicate the results which we obtained in the county in question. It was not long before a species new to Britain--to wit, _Porcellio ratzeburgii_--was found (74). This discovery was mentioned by Mr. Stebbing in the _Victoria County History of Essex_ (p. 71), and he prophesied that most of the British species then would be met with in the county. We may safely claim to have shown that his prediction was true, for we have been able to record in the preceding pages no less than sixteen other species, as will be seen from the following lists:-- _WOODLICE RECORDED FROM ESSEX._ 1. _Ligia oceanica_ 2. _Ligidium hypnorum_ 3. _Trichoniscus pusillus_ 4. _Trichoniscus roseus_ 5. _Haplophthalmus danicus_ 6. _Oniscus asellus_ 7. _Philoscia muscorum_ 8. _Platyarthrus hoffmannseggii_ 9. _Porcellio scaber_ 10. _Porcellio pictus_ 11. _Porcellio dilatatus_ 12. _Porcellio laevis_ 13. _Porcellio ratzeburgii_ 14. _Metoponorthus pruinosus_ 15. _Cylisticus convexus_ 16. _Armadillidium nasatum_ 17. _Armadillidium vulgare_ Of these _Ligidium hypnorum_ calls for special mention, as it had not been found in this country since Mr. Stebbing discovered it in Surrey in 1873. Several of the Porcellios and _Cylisticus convexus_ have been met with in but few places, and the same may be said of _Armadillidium nasatum_.