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XI. — On a Small Collection of Terrestrial Isopoda from Spain, with Descriptions 

 of Four New Species. By Walter E. Collinge, M.Sc, F.L.S., etc., Research 

 ' Fellow of the University of St Andrews. Communicated by Professor 

 M'Intosh. (With Two Plates.) 



(MS. received August 2, 1915. Read December 6, 1915. Issued separately December 28, 1915.) 



I am indebted to the kindness of Dr Leonard Doncaster, F.R.S., for the 

 opportunity to examine the present collection of Terrestrial Isopoda from the 

 Cambridge University Museum of Zoology. 



The Terrestrial Isopoda of Spain have received considerable attention in the 

 past at the hands of L. Koch,* Budde-Lund,! 0. de Buen, J and Dollfus,§ 

 and present many features of great interest, one of the most striking of which 

 is perhaps the large size of the various species, particularly in the genera Porcellio, 

 Latreille, and Armadillidium, Brandt, and to these I am now able to add the genus 

 Cubaris, Brandt. 



As Dollfus (op. cit.) has already remarked, the fauna of the Pyrenees, so far 

 as the Isopoda are concerned, is characterised by a group of species quite distinct 

 from the Mediterranean coast fauna, and one which well deserves further 

 investigation. 



The present collection contains seven species, of which four are new, two of 

 them coming from the Pyrenees. The list is as follows : — 



1. Porcellio batesoni, n. sp. S. Spain. 



2. ,, explanatus, n. sp. La Massane, Pyrenees. 



3. ,, rathhei, Brandt. E. Pyrenees. 



4. ,, sp. La Massane, Pyrenees. 



5. ,, sp. Madeira. 



6. Armadillidium nitididus, n. sp. Madeira. 



7. Cubaris invenustus, n. sp. La Massane, Pyrenees, and S. Spain. 



1. Porcellio batesoni, n. sp. (PI. I, figs. 1-6.) 



Body large, oblong-oval, covered with irregular coarse tubercles, dorsal face 

 convex. Cephalon (fig. l) with large lateral lobes, terminally truncate, median lobe 

 small and slightly indented in the median line, epistoma convex. Eyes moderate 

 in size, situated dorso-laterally. Antennae (fig. 2) covered with minute setae, joints 



* Die Thierun Andalusiens, 1856, pp. 418-423. 

 t Crust, hop. Terr., 1885, pp. 1-319. 

 \ Ann. de la Soc. Esp. Hist. Nat, 1887. 

 § Ibid., 1892, t. xxi, pp. 161-190, 13 text-figs. 

 TRANS. ROY. SOC. EDIN., VOL. LI, PART II (NO. 11). 66 



