AST ACTS. 



of Madrid are " alt outlier similar to tho<e of Britain [A. />,>//;/><]. excepl 

 that the subrostral spine is less developed." 



Crayfishes are also said to lie found in the neighborhood of Marceloiia, 

 on the eastern coast of Spain ((ierstlHdi, <>/>. cit., p. ~>S7). 1 c;mimt lind ;mv 

 mention of them in Portugal. 



A*/n<'iis /><///;/>es also inhabits England and Ireland, in which it is probaUv 

 the sole species. All the English and Irish specimens seen by IIii\l<-v 

 belong to this species (Huxley, <>}>. oil., pp. 288, 298).* Bell's figure is cer- 

 tainly the same, and probably Pennant's as well, although concerning the 

 latter there maybe some doubt. According to Huxley. ' They are abun- 

 dant in some of our [English] rivers, such as the Isis and other aflluents of 

 the Thames; and they have been observed in those of Devon ;t but they 

 appear to be absent from many others. I cannot hear of any, for example, 

 in the Cam or the Ouse, on the east, or in the rivers of Lancashire t and 

 Cheshire, on the west. It is still more remarkable, that, according to the 

 best information I can obtain, they are absent in the Severn, though they 

 are plentiful in the Thames and Severn Canal. Dr. M'Intosh, who has paid 

 particular attention to the fauna of Scotland, assures me that crayfish are 

 unknown north of the Tweed." 



Crayfishes are found in many localities in Ireland, where they would 

 seem to have been distributed to a greater or less extent by artificial means.|| 

 Perhaps they are not indigenous in any part of the island. Some remarks of 

 Wm. Thompson 1| point to the existence of two species in Ireland (A. Jliicinttllis 

 and A. palKpes ?). 



A. pallipcs is a burrowing species, being found in the winter, according to 

 Huxley, in holes in the banks of streams. The burrows may be more than 

 a yard deep.** In the neighborhood of Strasburg it is found in holes in the 

 canals (Lereboullet). 



* A. torrentiiim of Huxley is A. palllpex Lereb. 

 t Moore, Mag. Nat. Hist, New Series, III. 2S9, 1839. 



t There are specimens in the Museum of Comparative Zoology, from William Stimpson, said to 

 come from the neighborhood of Liverpool. 

 Huxley, op. cit., p. 288. 



|| \Vni. Thompson, " The Crustacea of Ireland," Ann. Mag. Nat. Hist., XI. 106, 1843. 

 5[ Op. cit., p. 107, foot-note. 

 ** Huxley, op. cit., p. 8. 



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