224 Mr. H. G. Jackson on a 



but owing to the absence of a male it is not considered 

 advisable to base a description on this material. 



References. 



Gendre, E. 1909. "Notes d'Helmintliologie africaine" (Deuxieme 

 Note). Proc.-verb. Soc. Linn. Bordeaux, Ixiii. pp. xxxiii.-xli. 



LiNSTOW, 0. VON. 1897. <'Nematlielmintlieri Grosstentlieils in Mada- 

 gascar gesammelt." Arch, f . Naturg. Ixiii. 1, pp. 27-34, pis. iv.-r. 



Seukat, L. G. 1917. " Phy Salop teres des Kep tiles du Nord-africain." 

 0. R. Soc. Biol., Paris, Ixxx. pp. 43-52. 



XXI. — On a new Species o/ Armadillidium. By Harold 

 G. Jackson, M.Sc, Birkbeck College, University of 

 London. 



The species of Armadillidium described and figured below 

 is founded on a large amount of material sent to me by 

 Mr. Edward Speyer, M.A. He collected it in the cucumber- 

 houses of the Experimental and Research Station, Cheshunt, 

 Herts, and I have great pleasure in associating his name 

 with it. I am also indebted to him for most of the figures 

 illustrating this paper. 



The holotype of the species is deposited in the British 

 Museum, where the work for this note has been done, bv the 

 courtesy of Dr. W. T. Caiman, F.R.S. 



Armadillidium speyeri, sp. n. 



Male specimen described. 



Body oblong-oval, 11mm. long by 5mm. broad; 



Firr. 1. 



Armadillidium spei/eri, antenna. 



moderately convex above. Surface smooth with very 

 minute granulations. Front of head slightly curved ; very 



