130 The Irish Naturalist. 



most of the material and valuable information regarding 

 the Irish Flora and Fauna ; Dr. Weltner, Berlin, for having 

 kindl}^ identified Hete?v??teye7iia Ryderi ; Dr. Gunther, F.R.S., 

 and Mr. Kirkpatrick for having sent me fragments of type- 

 specimens from the British Museum ; and finally, Mr. S. R. 

 Christophers for specimens of Ephydatia Millleri. 



LITERATURE 



1. BowERBANK, J. S. "A Monograph of the British Spongiadse." 



4 vols. 



2. Carter, H. J. ** History and Classification of the known species 



oi Spongillay A.M.N.H. (5) vol. vii., 1881, pp. 77-107. 



3. Carter, H. J. " Note on Spongilla fragilis, Leidy., and a new 



species of Spongilla from Nova Scotia." A.M.N.H. (5) vol. xv., 

 pp. 18-20. 



4. Garbini, a. " Contributo alia studio delle Spongille Italiane." 



Accad. Agriadt. Verona {3), vol. Ixx., 1894, 23 pp., 3 figs. 



5. MEREJKOWSKY, C. " Etudes sur les Eponges de la Mer Blanche." 



Mem. Acad. St. Petersbonrg, vol. xxvi., 1879. 



6. Petr, F. "Evropsk^HoubySladkovodnl." [European Spongillidae]. 



Chrudimi, 1894. 



7. Potts, E. "Contributions towards a synopsis of the American 



forms of Fresh-water Sponges, with descriptions of those named 

 by other authors and from all parts of the world." Proc, Acad. 

 Science, Philadelphia, 1887, pp. 158-279, 8 pis. 



8. ToPSENT, E. *' Note sur la faune des Spongillides de France." 



Bull. Soc. Zool. France, vol. xviii (1893), p. 176. 



9. ToPSENT, E. "Etude sur la faune des Spongiaires du Pas-de- 



Calais suivie d'une application de la nomenclature actuelle k 

 la Monographic de Bowerbank." Rev. Biol. Nord France, vol. 

 vii. (i894-95), pp. 6-28. 



10. TRAXiyER L. " Spongilliden der Umgebung von Jaransk." Zool. 



Anzeiger, vol. xvii. (1894), pp. 363 and 364. 



11. Wai.i,ace, a. R. "The Geographical Distribution of Animals." 



2 vols., 1876. 



12. Wahace, A. R. " Island lyife." 2nd ed., 1892. 



13. Wei^Tner, W. "Die Susswasserschwamme." In " Die Tier-und 



Pflanzenwelt des Siisswassers," by O. Zacharias. Vol. I., pp. 

 186-236. 1891. 



14. WeI/Tner, W. " Ueber die Autorenbezeichnung von Spongilla 



erinaceus.''^ Sitz. Ber. Ges. naturf. Freimde, Berlin, 1893, No. i, pp. 

 7-13- 



15. WiERZEJSKi, A. " Ueber das Vorkommen von Carterius stepanovii, 



Petr, and IJeteronieyenia repens. Potts, in Galizien." Biol. Centralbi, 

 vol. xii., 1892, pp. 142-145. 



EXPI^ANATION OF Pl.ATE \. 



All figures are magnified 200 diameters. 



Fig. I. Euspongilla lacustris, Autt. From Killakeen, Co. Cavan. — a. 

 skeleton-spicule ; b. gemmule-spicule ; c. flesh-spicule. 



Fig. 2. Spongilla fragilis, Leidy. From Bohemia. (From type specimen 

 in British Museum, sent to Dr. H. J. Carter by Prof. Vejdovsky).— a. 

 skeleton-spicules ; b. gemmule-spicules. 



