582 B. A. MINOHIN. 



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 1892. (3) MiNCHiN, E. A. — "Some Points in the Histology of Leucoso- 

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1892. TopsENT, E. — "Notes histologiques au sujet de Leucosolenia 



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1893. Dendy, a, — " Studies, &c. V. Observations on the Structure and 



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1894. (1) Lendenfeld, K. von. — " Die Tetractinelliden der Adria, &c.," 



' Denkschr. d. k. Akad. d. Wiss. Wien, Math, naturw. Classe,' Ixi, 

 pp. 91—204, Taf. i— viii. 



1894. (2) Lendenfeld, R. von. — "Ergebnisse neuerer Untersuchungen iiber 



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1895. Delage, Y. — 'La Structure du Protoplasma et les Theories sur I'Here- 



dite, &c.,' Paris, Reinwald et Cie,, 1895. 



1896. (1) MiNCHiN, E. A. — "Note on the Larva, &c., of Leucosolenia 



variabilis, &c.," 'Proc. Eoy. Soc.,' vol. Ix, pp. 42—52. 



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Asconidffi," 'Ann. Mag. Nat. Hist.' (6), xviii, pp. 349—362. 



1897. Doderlein, L. — " Ueber die Lithonina, eine neue Gruppe von Kalk- 



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EXPLANATION OF PLATES 38—42, 



Illustrating Mr. E. A. Minchin's paper on "Materials for a 

 Monograph of the Ascons." 



All the figures are drawn with the camera lucida, using oc. 4 (Zeiss) and 

 obj. 2 nam. immersion (Leitz), and are magnified about 1400. 



Significance of the Letteeing. 



act. bl. Actinoblast. am.c} Nutritive wandering cell (amcebocyte). am.c? 

 Clear wandering cell, am.c? Minute wandering cell, apic.form. cell. Apical 

 formative cell of the spicule ray. bas.form. cell. Basal formative cell of the 

 spicule ray. col. Collar, col. cell. Collar-cell, derm.ap. Dermal (external) 

 aperture of pore. Jl. Flagellum. ^.ep. Elat epithelium, gastr.act.bl. Gastral 



