PLATE XIV. 



The lettering is the same iu all the figures. 



a Acontia. 



ft Mesenteric filaments. 



c Stomata in the septa. 

 c J Perioral stomata. 

 c- Marginal stomata. 

 cu Cuticle. 



d Glandular streaks of the mesen- 

 teric filaments. 



e Ciliated streaks of the mesenteric 

 filaments. 

 ek Ectoderm. 

 en Endoderm. 



;/ Reproductive organs. 



h Septa, rh Directive septa. 



i Oral disk. 



k Wall. 

 I Pedal disk. 

 m Muscles. 

 mm Mesodermal muscle9. 

 ml Longitudinal muscles of the septa. 

 mP Retractor. 

 mp Parietobasilar muscle. 

 mt Transverse muscles. 

 mr Radial muscles of the oral disk 

 and longitudinal muscles of the 

 tentacles 

 ms Circular muscle of the walL 

 me Mesoderm. 

 n Urticatiug cells. 

 o Ovicells. 



p Filamental apparatus of the ovicells. 

 p 1 Process of the ovicell. 

 p- Apical set of epithelial cells. 

 r Marginal spherules. 

 rh Directive septa, 

 s (Esophagus. 

 so Openings of the oesophagus into 



the radial chambers. 

 sr (Esophageal grooves. 

 gz Lappets of the oesophagus. 

 t Tentacles and the openings homolo- 

 gous with them. 

 t 1 Principal tentacles. 

 t' 2 Accessory tentacles. 

 v Openings of the pedal disk. 



All statements given as to magnifying powers have reference to Zeiss's system. The magnifying powers amount to 



a 1 

 A 

 C 



Oc. 1. 



55 

 95 



Oc. 2. 



10 



70 



125 



D 

 F 



J 



Oc. 1. 

 195 

 410 



470 



Oc. 2. 

 240 

 550 

 580 



A with unscrewed front lens (unscr. A) magnifies with Oc. 1 : 30 times ; with Oc. 2 : 40 times. 



Zoanthus, sp. ? (figs. 1-4 and 6). 



Fig. 1. Longitudinal section through the upper end of the wall and the circular 

 muscle running in it. Unscr. A, Oc. 2. 



Fig. 2. Transverse section through the wall, oesophagus, niacrosepta and microsepta. 

 A, Oc. 2. 



Fig. 3. Transverse section through an individual of a Zoanthus colony. The figure 

 is composite, the left-hand half representing a transverse section on a level with the 

 oesophagus, the right-hand half a transverse section situated rather further down. 

 a 1 , Oc. 2. 



Fig. 4. Part of a transverse section through the wall. D, Oc. 2. 



Fig. 6. Transverse section through a small individual of a Zoanthus colony, passing 

 through the oesophagus, a 1 , Oc. 2. 



Ejnzoanthus 2'>cirasiticus (fig. 5). 



Fig. 5. Part of a transverse section through the wall of Epizoanthus parasiticus. 

 D, Oc. 2. 



Liponema multiporum (fig. 7). 



Fig. 7. Marginal portion of the oral disk of Liponema multiporum ; twice the natural 

 size. 



Sphenopus arenaceus (fig. 8). 



Fig. 8. Transverse section through the wall of Splienopus arenaceus. D, Oc. 2. 



