IN THE STOMOMUM OF THE ALCYONARIANS. 
705 
diagrammatic). The siplionoglyphe is here feebly marked, and armed 
with comparatively short cilia. 
Fig. 5, Section through a portion of a colony of Sarcophyton in a plane at right angles 
to the long axes of the polyps. A number of siphonozooids are seen in 
transverse section, separated from one another by a fleshy sarcosoma, 
traversed in all directions by the gastrovascular canals. The siphono- 
glyphe in all is seen to be well developed and situated on the same side 
of the stomodseum. Portions of two autozooids are seen at the sides of 
the drawing. 
Fig. 6. Transverse section through the stomodseum of an autozooid of Paragorgia 
arborea. The stomodseum is seen to be thrown into folds, and the 
epithelium is armed with short cilia throughout. There is no marked 
thickening of the epithelium, nor lengthening of the cilia on the ventral 
side. 
Fig. 7. Transverse section through a siphonozooid of Paragorgia (semi-diagrammatic). 
The siplionoglyphe, of very large proportions, is seen in the stomodseum. 
The gastrovascular canals are seen anastomosing in the sarcosoma. The 
spicules are omitted. 
Fig. 8. Vertical section through a portion of a colony of Paragorgia arbor ea. A 
number of siphonozooids are seen in longitudinal section, some of which 
contain ova. The branching canal system is represented as it appears in 
section, and numerous spicules are seen imbedded in the substance of the 
sarcosoma. 
Fig. 9. Transverse section through the stomodseum of a siphonozooid of Renilla. The 
siphonoglyphe has not a very great extent, but is armed with enormously 
long cilia, which extend across the lumen of the stomodseum. 
Fig. 10. Transverse section through a siphonozooid of Pennatula. The siphonoglyphe 
here is of considerable size, and armed with long cilia. 
Fig. 11. Transverse section through a polyp of Villogorgia. This drawing was 
kindly done for me by Mr. G. C. Bourne, of New College, Oxford, and 
accurately represents the appearance of one of my sections through a 
polyp of Villogorgia, which was stained in borax carmine after decalcifica¬ 
tion by means of nitric acid. The epidermic cells lining the stomodseum 
are not easily differentiated from one another, owing to the numerous 
highly refracting particles which they contain. The cilia lining the 
stomodseum cannot be seen with the highest power. There is no siphono¬ 
glyphe, but a deep groove (g.) runs down the dorsal side of the 
stomodseum. 
Fig. 12. Transverse section through a polyp of Primnoa lepadifera. The stomodseum 
is lined by small cilia, but no siphonoglyphe is present. No trace of the 
dorsal groove of Villogorgia can be seen. 
