428 G. HERBERT FOWLER. 



List of the Papers chiefly quoted. 



Bourne, G. C. — ' Quart. Journ. Micr. Sci.,' xxvii (Fungia). 



Bourne, G. C. — ' Quart. Journ. Micr. Sci.,' xxviii (Euphyllia, Mussa). 



Duncan, P. M. — 'Journ. Linn. Soc," xvii (revision of genera). 



Fowler, G. H. — " Anat. Madr.," i, 'Quart. Journ. Micr. Sci.,' xxv; ii, ibid., 



xxvii ; iii, ibid., xxviii. 

 von Heider, A. — 'Zeitschr. wiss. Zool.,' xliv (Dendrophyllia). 

 von Koch, G. — ' Jen. Zeitschr. Naturw.,' xi (Stylophora). 

 von Koch, G. — ' Morph. Jahrb.,' v (Caryophyllia). 



Moseley, H. N. — " Chall." Rep. Zool., ii (Stephanophyllia, Sphenotrochus). 

 Sclater, W. L. — 'Proc. Zool. Soc.,' 1886 (Stephanotrochus). 



EXPLANATION OF PLATES XXXII and XXXIII, 



Illustrating Mr. G. Herbert Fowler's paper on " The Anatomy 

 of the Madreporaria/' IV. 



Fig. 1. Madracis asperula. — Diagrammatic transverse section through a 

 polyp at three different levels, showing the eight entocoelic septa and eight 

 pairs of mesenteries. A, above the level of the theca ; the exsert edges of the 

 septa only are cut in this section. B, through the theca ; showing the peri- 

 pheral lamellae. C, below the surface of the coenenchyme. The support of 

 the body wall on the echinulations agrees essentially with that of other forms 

 previously figured (cf. "Anat. Madrep.," ii, fig. 4; or iii, figs. 2, 9). d., 

 " directive " septa, col. Columella, ccen. Coenenchyme. Ectoderm, "blocked" 

 black and white ; mesogleea, black ; endoderm, grey ; corallum, dotted (v. 

 pp. 2-4). 



Fig. 2. Amphihelia ramea. — Diagrammatic transverse section through 

 two quarters of a polyp, showing half of the twenty-four septa and of the 

 twelve pairs of mesenteries. A, through the theca in the region of the ten- 

 tacles, showing the peripheral lamellae. B, below the stomodseum, showing 

 the external canals between body wall and corallum. Ectoderm, quasi- 

 cellular; endoderm, mesogleea, and corallum as in Fig. 1 (v. pp. 4 — 6). 



