POLYPI. 91 
The cylindrical body is formed of a thick skin of which the 
innermost layer consists of longitudinal and transverse muscles. 
The tentacles are hollow. The stomach is a folded blind sac. The 
space between the stomach and the skin is divided by numerous 
partitions ; the ovaries, whose efferent canals open into the base of 
the stomach, lie in the chambers thus formed’. 
Actinte are marine animals; they occur in the temperate and 
torrid zones. Some species are brought to market by the Italians _ 
and are eaten. 
A. With lateral pores (Cribrinaw Hempr. and EnRENB.) 
Sp. Actinia effata L., Basrer |. Tab. xiv. fig. 3, Rapp, 1. 1. Tab. u. fig. 2.— 
Actinia coriacea Cuv., Actinia senilis L., BAsTER |, Tab, x11. fig. 2. Rapp, 
1, 1. Tab. 1. fig. 3, 4, Lesson Ilustr. de Zoologie, Pl. urv. 
BL. Without lateral pores (Actinia EXRENB.) 
Sp. Actinia viridis Guut., Priapus viridis Forsk. Icon. Rer. natural. Tab. 
Xxvul. fig. B, b, Actinia Cereus Rapp, 1. 1. Tab. w. fig. 3; this species is 
eaten in the south of France, and is known by the name Ortie or Ortigue ;— 
Actinia tapetum Hemer, and EXRENB, with short and numerous tentacula ; 
this species in the contracted state occasioned the establishment of a new 
genus, supposed to be distinguished by the absence of tentacles : Discosoma 
RueEpret and Luvcx., Neue wirbellose Thiere des rothen Meeres, Frankf. a. 
Main. 1828, Tab. 1. fig. 1.? 
Actinodendron Qtuoy and GAimArD. Tentacles ramose (or 
provided with vesicles lateral, fasciculate, HHRENB.) 
Thalassianthus Rurpp. and Levcx., Epicladia Eurens. Ten- 
tacles pectinate. 
Minyas Cuvy. Actinecta Luss. Body free, globose, ribbed. 
Mouth surrounded by tentacles in many rows, which are sometimes 
lobate. Disc opposite the mouth supplied with aeriferous canals, 
serving to suspend the animal in water. 
1 Besides the works of BerTHoLD and Rapp referred to, that of RymMER JONES, 
General Outline of the Animal Kingdom and Manual of Comparative Anatomy, London, 
1841. pp. 39—44, also contains a detailed anatomy of Actinia. 
* Comp. also the descriptions of several Mediterranean species of Actinia given by 
A. F. Grune, Actinien, Lchinodermen und Wiirmer des Adriatischen und Mittelmeers, 
Konigsberg, 1840, 4to.; amongst the new species is one remarkable for its change of 
colour, Act. Chameleon GRUBE. 
