A REVISION OF THE BRITISH IDOTEID^E. 753 



Miers further states : " This is a very variable species, and I have been obliged 

 to unite under one name several types that have usually been considered distinct. 



" It occurs on the shores of the Mediterranean and Adriatic, in the Black Sea, 

 and on the South British coasts, and northward apparently as far as the island of 

 Cumbrae on the Clyde. 



" Dr Leach's designation of /. acuminata may apply to what may be considered 

 the typical form of this species, in which the body is less distinctly carinated, the 

 epimera [coxal plates] less distinctly angulated, and the terminal segment lanceolate, 

 with the sides rounding off to the distal extremity, which is acute or subacute, but 

 not produced and acuminated. 



Besides Leach's typical specimen (which is in very bad condition), there is but 

 a single specimen, from Tripoli, in the British Museum collection presenting these 

 characters." 



Geographical Distribution. — " On the shores of the Mediterranean and Adriatic, 

 in the Black Sea, on the South British coasts, and northward apparently as far as 

 the island of Cumbrae on the Clyde" (Miers). Channel Isles (Koehler). 



BIBLIOGRAPHY. 



1) Bate, C. Spence, "On the British Edriophthalnia," Rep. Brit. Assoc, for 1855, London, 1856, 



pp. 18-62, pis. xii-xxii. 



2) "On some new Australian Species of Crustacea," Proc. Zool. Soc. Lond., 1863, pp. 498-505, 



pis. xl, xli. 



3) Bate, C. Spence, and J. 0. Westwood, A History of the British Sessile-eyed Crustacea, London, 



1868 : Isopoda, vol. ii, pp. 99-495. 



4) Benedict, J. E., "A Revision of the Geuus Synidotea," Proc. Acad. Nat. Sci. Phila., 1897, pp. 389-404. 



5) Bonnier, J., "Catalogue des Crustaces Malacostract's recueillis dans la baie de Concarneau," Bull. 



Sci. du Dipt, du Nord, 1887 (s. 2), t. x, pp. 3-190. 



6) Bosc, L. A. G., Histoire naturelle des Crustaces, Paris, 1802, pp. 1-296, 18 pis. 



7) Brandt, J. F., " Conspectus Monographie Crustaceorurn Oniscodorum Latreilli," Bull. Soc. Imp. Nat. 



Moscou, 1833, vol. vi, pp. 171-193. 



8) Brandt, J. F., and J. T. C. Ratzeburg, Medizinische Zoologie, Berlin, 1830-34, vol. ii. 



9) Brandt, E., "Du systeme nerveux de YIdothea entomon (Crustace isopode)," Compt. Reudus, 1880, 



pp. 713-715. 



0) Calman, W. T., "Crustacea," part vii, fasc. 3, in Lankester's Treatise on Zoology, London, 1909. 



1) Chilton, Charles, "Revision of the New Zealand Idoteidae," Trans. New Zealand hist., 1890, 



vol. xxii, pp. 189-204. 



1a) "On a new Species of Idotea," Ann. and Mag. Nat. Hist., 1885 (s. 5), vol. xv, pp. 123, 124, 



pi. Va., figs. 1-3. 



2) Claus, Grundzuge der Zoologie, French trans., Paris, 1871. 



3) Collinge, Walter E., "On the Range of Variation of the Oral Appendages in some Terrestrial 



Isopods," Joum. Linn. Soc. Lond. (Zool), 1914, vol. xxxii, pp. 287-293, pis. 20, 21. 



4) "Some Observations on the Isopod Idotea hectica (Pallas)," Ann. and Mag. Nat. Hist., 1915 



(s. 8), vol. xvi, pp. 162-164, pi. ix. 



5) "On the Isopoda of the Family Idoteidae occurring in St Andrews Bay," Scottish Nat., 1915, 



pp. 331, 332. 



TRANS. ROY. SOC. EDIN., VOL. LI, PART III (NO. 23). 110 



