British Land Isopoda. 77 



the sides scarcely incurved, the extremity truncated. TTropods 

 liaving the exopodite as broad as long ; the endopodite rather 

 shorter. Colour uniformly greyish-lead or marked witli spots 

 or daslies of sulphur-yellow. 



Length 17 millim., breadth 9 millira. 



Tlic Rev. T. E,. R. Stebbing has found this species at 

 Sliireliampton, near Bristol, and AI. A. Dollfus lias specimens 

 which were collected by Mr. Miers at Clifton. 



Specimens in ray collection are from Italy [Gopenhagen 

 Mus.) and Cap d'Antibes, Riviera {A. Dollfus). 



The occurrence of this species in our islands is of much 

 interest, as it was before only known in the south of Europe. 

 A. no. sa turn is found in France; in that country it occurs 

 abundantly in dry and sandy places in the south, but 

 becomes scarce northwards. It has also quite recently been 

 met with near Hamburg by Michaelsen. There is a possi- 

 bility that A. depression may have been introduced, since as 

 yet it has only occurred within a few miles of the seaport of 

 Bristol ; but this cannot have been the case with A. nasatuniy 

 for it has been found in three distant localities, and no more 

 unlikely place for an introduced species could be found than 

 tufts of vegetation growing in the chinks of the great wild 

 rocks which form the magnilicent scenery of Cheddar Cliffs. 



As my friend M. A. Dollfus's admirable paper on the 

 ArmadiUidin of France is not easily accessible to English 

 students, I have ventured to reproduce here his figures illus- 

 trative of two of the recent additions to our fauna. Haplo- 

 plithalmus danicus will be found figured in Sars's work. 



In order to show the distribution of our known species in 

 Northern Europe, and also to indicate others which may 

 possibly hereafter be added to our fauna, I give the following 

 Table of Distribution (p. 78). 



In the first six columns all species are recorded which are 

 known in those countries ; columns seven and eight are only 

 given for the purpose of showing a partial extension of range 

 of the species in the preceding columns. The Land Isopoda 

 rapidly increase in numbers towards the south of Europe. 

 M. A. Dollfus has recorded no less than seventy-eight species 

 as inhabiting France and sixty-nine as found in Spain. 



All the species under Norway are fully and admirably 

 figured in Sars's beautiful work already referred to, as are 

 also some species whicli he has reason to hope may yet be 

 found in Norway — Ligidium hgpnorum, Trichoniscus roseus, 

 Platyarthrus llofftnannseggii, Forcellio liBvis, and Arnia- 

 dididium opacum. 



