A SMALL COLLECTION OF TERRESTRIAL ISOPODA FROM SPAIN. 463 



Colour (in alcohol) : body blackish grey, head pale green with three dark, irregular, 

 triangular patches. The middle portions of both mesosomatic and metasomatic 

 segments are occasionally marked with light-green patches. 



Habitat. — La Massane, E. Pyrenees. June 22nd, 1891 (D. Sharp). 



Type. — In the Cambridge University Museum of Zoology. 



In certain features this species is allied to P. exjjansus, Dollfus, but differs from 

 that species in the smaller size, the shape of the cephalon and its lateral and median 

 lobes, the antennae, and the uropoda. 



3. Porcellio rathkei, Brandt. 

 Habitat. — E. Pyrenees. June 1891 (D.S.). Two examples. 



4. Porcellio sp. 



This is probably a new species ; unfortunately, there is only a single imperfect 

 specimen. 



Habitat. — La Massane, E. Pyrenees. June 22nd, 1891 (D.S.). 



5. Porcellio sp. 



Habitat. — Madeira, 1892 (J. W. Clark). Two imperfect specimens. 



6. Armadillidium nitidulus, n. sp. (PL I, figs. 12-15 ; PL II, figs. 16-19.) 



Body oblong, strongly convex. Cephalon (figs. 12 and 13) large, broadly quad- 

 rangular, marginate, lateral lobes rounded, deeply concave below, epistoma vertical, 

 with triangular shield from the frontal margin. Eyes distinct, dorso-lateral. Anten- 

 nulae (fig. 14) small, three-jointed, terminal joint with pointed end and seven strong- 

 lateral spines. Antennae (fig. 15) short, joints 2-4 flattened on their outer sides, 

 5th joint slightly grooved ; flagellum two-jointed. First maxillae (fig. 16) : the outer 

 lobe terminates in four stout curved spines and five more slender ones, with numer- 

 ous setae distally on the outer side ; inner lobe terminally rounded, thin, with two 

 setose spines. Second maxillae terminate in an inner dense tuft of setae and a blade- 

 like outer lobe. The segments of the mesosome are strongly convex and shiny, 

 pleural plates 1-5 distinct, the 1st only overlaps the segment behind, posterior margin 

 not incised, those of 6 and 7 lamellar-like and truncate terminally. Outer palp of 

 the maxillipedes terminates in spinous process with a multispinous termination. 

 Metasome comparatively small. Uropoda (figs. 18 and 19) short, not extending 

 beyond the telson, basal plate stout, somewhat triangular, with broadly expanded 

 anterior surface ; exopodite spatulate, endopodite rudder-shaped, flattened ventrally 

 and slightly raised on the dorsal surface. Telson (fig. 17) rather long, triangular, 

 terminating in a truncate base. 



Length 16 '5 mm. 



