WORKS AND PAPERS ON SPONGES. 223 



Potts (E.). New genera and forms of Presh-'Water Sponges, 

 Proc. Acad. Nat. Sci. Philadelphia, June 14th, 1881, and July 

 26th, 1881, p. 176; also Ann. Nat. Hist., ser. 5, viii, 1881, 

 pp. 387, 389. 



NozEMAir (C). Over de inlandisehe Zoetwater Spongie, Haarlem, 



4to., 1788. 

 Savignt (J.'C). Description de I'Egypte, Iconographie, Paris, 



fol. max., 1810, Zoophytes, pis. 1 — 3. 

 Beetoloni (A.). Sopra alcune produx. nat. (Sponffitarit) nel 



golfo della Spezia, Modena, 1832, 4to. 1 plate. 

 Milne-Edward s (H.). Cuvier, Eegne Animal (edit. Masson), 



1850, Zoophytes, pi. 95. 

 Thompson (W.). Natural History of Ireland, vol. iv, 1856, 



pp. 480 — 484 (List of Irish Sponges). 

 Geeene (J. E.). Manual of the Protozoa, 1859, pp. 30 — 43 



(woodeuts). 

 CniMMO (W.). Natural History of the Uuplectella aspergilltun, 



1878, 6 plates. 

 Balfoue (F. M.). On the Morphology of the Spongidee, Quart. 



Journ. Micros. Science, vol. xix, 1879, p. 103. 



