Haddon and Shackleton — Actinice : I. Zoanthece. 689 



well developed in our specimen, whilst in his it is very weak (1889, p. 124). Cell 

 enclosures (similar to those described and figured by M^Murrich) are found in the 

 disc of G. macmurrichi. Foreign bodies are occasionally found embedded in the 

 mesoglcea of this region. 



(Esophagus. — The tissues of the oesophagus are badly preserved in our specimen. 

 There is a slight thickening of the mesoglcea at the groove, but we are unable to 

 give further particulars. 



Mesenteries. — The mesenteries are arranged as in other Brachycneminse. The 

 mesoglcea is well develojaed in both imperfect and perfect mesenteries. The 

 muscular layer appears to be feebly developed, the mesogloeal plaitings not being 

 well marked. A vertical canal runs through each mesentery, from the base of the 

 polyps to the disc ; in many cases it appears to divide, giving rise to two or more 

 canals in the oesophageal region. The reflected ectoderm and the filaments are so 

 badly preserved that it is impossible to make out the particulars of tlieir arrange- 

 ment. The endoderm of the mesenteries is very similar to that which lines the 

 body-wall. 



Gonads. — There were no gonads in our specimen. 



This species can easily be distinguished anatomically from the two species 

 investigated by M'^Murrich, but externally they appear to be very similar. 



Gemmaria mutuki, n. sp. 



(PI. LXI., fig. 10.) 



Form. — Erect, wider above than below ; upper portion of retracted specimens 

 with a large number (24—30) of fine radial ridges, which are continued some way 

 down the column; lower portion of column wrinkled in spirit specimens. Basal 

 gemmation occurs. 



Colour. — Grayish-white in spirit. 



Dimensions. — Height, 10— 12 mm. ; average diameter, 4.5 mm. 



Locality. — Mabuiag, 6th October, 1888; 5 specimens. 



We have named this species after a local hero, Mutiik by name, whose adven- 

 tures are recorded in the Journal of the Folk-lore Society, " Folk-lore," I., 1890, 

 p. 56. 



Body -wall (fig. 1, p. 690). — The ectoderm is continuous, and is covered by a thin 

 cuticle to which numerous diatoms adhere. Occasional zooxanthellte are to be found 

 in the ectoderm. The mesoglcea is rather thin relatively to the diameter of the polyp. 

 Numerous incrustations are embedded in the mesoglcea. They are chiefly spicular ; 

 ascidian as well as sponge spicules being frequently found. Grains of sand are 



TEANS. ROY. DDB. SOC, N.S. VOL. IV., PAriT XIII. 5 Gr 



