51-1 PHOF. A. DENDY AND MISS L. M. FREDERICK ON 
darkly staining, spherical cells, about 0'006 mm. in diameter, are found 
embedded in the mesogloea ; these cells are most abundant around the various 
parts of the inhalant canal-system and congregated in immense numbers in 
the inner portion of the ectosome ; they are probably symbiotic algse such as 
are known to occur frequently in sponges. 
Register No. and Jjocality. IV. 5, Wooded Isle. 
List of Literature referred to. 
1921. Babic, K. — " Monactinellida und Tetractinellida der Adria '' (Glasnik hi'v. 
prirod. drustva. g. xxxiii. g, 1921, pp. 1-17). 
1922. " Monactinellida und Tetractinellida des Adriatischen Meeres " (Zool. 
Jahrb. Bd. 46, pp. 217-302). 
1863. Balsamo-Oeivelli, G.— " Di alcimi spongiarj del golfo di Napoli " (Milano 
Soc. Ital. Atti, vol. v. pp. 284-302). 
1866. BowEEBANK, J. S.— " A Monograph oi the British Spongiadfe, Vol. II." (London). 
1873. "Contributions to a General History of the Spongiadse, Part IV." 
(Proc. Zool. Soc. London, 1873, pp. 3-25). 
1874. "A Monograph of the British Spongiadte, Vol. III." (Loudon). 
1882. " A Monograph of the British Spongiadee, Vol. IV." (edited, with 
additions, by the Rev. A. BI. Norman. London). 
1923. BuETON, M. — " A Revision of the Family Douatiidae." MS. 
1870. Cartee, H. J. — "On two new Species of Subsphterous Sponges, with Observations " 
(Ann. & Mag. Nat. Hist. vol. vi. pp. 176-182). 
1873. "On two new Species of Gumminete (Corticium ahyssi, Chondrilla 
australiensis), with special and general Observations " (Ann. & Mag. Nat. 
Hist. vol. xii. pp. 17-30). 
1876. " Descriptions and Figures of Deep-Sea Sponges and their Spicules, from 
the Atlantic Ocean, etc." (Ann. & Mag. Nat. Hist. vol. xviii. pp. 388-410). 
1879. "Contributions to our Knowledge of the Spongida " (Ann. &. Mag. Nat. 
Hist. vol. iii. pp. 284-.360). 
1882 A. — ■ " Some Sponges from the West Indies and Acapulco, in the Liverpool 
Free Museum, etc." (Ann. & Mag. Nat. Hist. vol. ix. pp. 266-301, 346-.368). 
1882 B. "New Sponges, Observations on old ones, and a proposed New Group" 
(Ann. & Mag. Nat. Hist. vol. x. pp. 106-125). 
1883. " Contributions to our Knowled<>e of the Spongida. Pachytragida " 
(Ann. & Mag. Nat. Hist. vol. xi. pp. 344-.369). 
1885-6. " Descriptions of Sponges from the Neighbourhood of Port Philhp Heads, 
etc." (Ann. & Mag. Nat. Hist. vols, xv., xvi., xvii., xviii.). 
1886. " Supplement to the Descriptions of Mr. J. Bracebridge Wilson's 
Australian Sponges " (Ann. & Mag. Nat. Hist. vol. xviii. pp. 445-466). 
1887 A. "Report on Marine Sponges, chiefly from King Island, in the Mergui 
Archipelago, etc." (Journ. Linn. Soc, Zool. vol. xxi. pp. 61-84). 
1878. CzEENiAVSKY, Vladimie. — "The littoral Sponges of the Black and Caspian 
Seas: Preliminary Report" (Mosc, Soc. Nat. Bull. vol. liii. pt. 2, 
pp. 375-397). 
1889. Dendy, a. — " Report on a Second Collection of Sponges from the Gulf of Manaar " 
Ann. & Mag. Nat. Hist. vol. iii. pp. 73-99). 
1891. "Monograph of the Victorian Sponges: Part I. The Organisation and 
Classification of the Oalcarea Homocoeln., v.'ith Descriptions of the Victorian 
Species " (Trans. R. Soc. Vict. vol. iii. pp. 1-82). 
