PROTOZOA. 
BY 
0. F. Lutken, Ph.D., F.R.D.A. 
SPONGOZOA. 
1. Bowerbank, J. S. a monograph of the British Spongiadm. III. 
London ; 1874 (printed for the Ray Society), 3B4 pp. 92 pis. 
2. . ’A monograph of the siliceo-fibrous Sponges. III.-V. P. Z. S. 
1876, pp. 272-281, 503-609, & 558-565, pis. xxxix. & xL, Ivi. & Ivii., & 
Ixi. & Ixii. 
3. . Further observations on Alcyoncellum speciosum^ Quoy & Gai- 
mard, and Hyalonema mirabilis, Gray. L. c. pp. 607-610. 
4. . Contributions to a general history of the Spongiadm. Yll. 
L. c. pp. 281-296. 
5. Carter, H. J. On the genus Rossella (a hexactinellid sponge) with 
descriptions of three species. Ann. N. H. (4) xv. pp. 113-122, 
pi. X. 
6. . Notes introductory to the study and classification of the 
Spongida. Pt. I. Anatomy and physiology. Parc II. Proposed 
classification of the Spongida. Op. cit. xvi. pp. 1-40, 126-146, 177- 
200, pi. iii. 
7. Clark, H. J. The American Spongilla, a craspedote flagellate In- 
fusorian. M. Micr. J. vii. (1872) pp. 104-114, pi. xi. 
8. Ekhel, G. Nuove communicazione sopra le Spugne. Boll. Soc. 
Adriat. i. p. 100. 
). Higgin, T. Sponges, their anatomy, physiology, and classification. 
P. Liverp. Soc. xxix. pp. 193-216, pis. i.-iii. 
1-0. — . On two hexactinellid Sponges from the Philippine Islands 
in the Liverpool Free Museum. With Remarks by H. J. Carter. 
. Ann. N. H. (4) xv. pp. 377-389, pis. xxi. & xxii. 
1. . On anew sponge of the genus Luffaria^ from Yucatan, in 
the Liverpool Free Museum. Op. cit. xvi. pp. 223-227, pi. vi. 
