THE ANATOMY OP ALOTONIUM DIGITATUM. 383 



28. Lo BiANCHO Salvatoke. — " Notlzie biologiche riguardauti speciaU 



mente il periodo di maturita sessuale degli animali del Golfo di Napoli," 

 ' Mitt. z. Stat. Neap.,' viii, 386. 



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the " Oban " Dredging Expedition,' 1882. 



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vol. ii. 



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32. Pallas. — ' Elenchus Zoophytorum.' 



33. PiCTET, C. — " Recherches sur la spermatogenese chez quelques Inverte- 



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34. Reaumur, R. — 'J\Jemoires pour servir a I'Histoire des Insectes,' 1742, 



vol. vi, p. 55, preface. 



35. Schneider, K. C. M. — " Einige histologische Befunde an Coelenteraten," 



'Jen. Zeits.,' xxvii, p. MO. 



36. Trembley, a. — 'Memoires pour servir a I'Histoire d'un genre de Polypes 



d'eau douce, a bras en forme de comes,' Leiden, 1744. 



37. VoGT, C, and Jung, E. — ' LeLrbuch der praktischen Vergleichenden 



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38. Wilson, E. B.— "The Development of Keuilla," 'Phil. Trans,' 1883, 



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39. Wilson, E. B.— " The Mesenterial Filaments of the Alcyonaria," ' Mitt. 



z. Stat. Neap.,' v. 



EXPLANATION OF PLATES 36—39, 



Illustrating Mr. Sydney J. Hickson's paper on "The Anatomy 

 of Alcyonium digitatura." 



Lettering used throughout. 



D. Dorsal intermesenterial space. Ed. Ectoderm. E?id. Endoderm. can. 

 Canal iu mesogloea. e.g. Coagulum in spermagem. Dmf. Dorsal niesoii- 

 terial filament, f.c. Flagellate cells of ventral mesenterial filaments, g.c. 

 Glaud cells of veutral mesenterial filaments, gon. Gonad, gon. $ . Ovary. 

 gon.$. Testis or spermagem. gr. Parasitic sporozoon? g.v. Germinal 



