35 
Dr. Reid on a new species of Actinia. 
bands of a faint reddish brown colour and adhering along their 
edges^ radiate inw^ards from the circumference of the disc^ con- 
verge at its centre, and prolong themselves upwards to form the 
mouth, or rather the lips. The margin of the lips is surrounded 
by twelve small processes, six of which are very minute ; these 
processes are of a triangular form and of an orange colour, except 
at the edges, which are translucent. This prolonged mouth did 
not always occupy the centre of the disc, but could be directed 
towards any part of the margin. 
The external sac sent strong partitions inwards, the position of 
which was marked by the longitudinal lines on its outer surface, 
and in the interstices of these partitions the ovaries w^ere placed. 
This animal in many respects closely, resembles the Iluanthos 
of Professor E. Forbes*, and the chief difference between 
them is found in the structure of the mouth. 
EXPLANATION OF PLATES V. and VI. 
Plate V. 
Figs. 1, 2, 3, 4 and ,5. Representations of the more common forms assumed 
by the larvae. 
Fig. 6. A larva slit open and stretched out to show the four vertical canals, 
and the manner in which they terminate in the circular canal : 
a, extensible lips ; h, circular canal ; c, four vertical canals ; d, teii- 
tacula considerably shortened by their contraction. 
Fig. 7. Transverse section of the body of a larva to show the manner in 
which the four vertical canals are formed : a, vertical canals. 
Fig. 8 Piliferous capsule entire. 
Fig. 9. Piliferous capsule burst and the spiral filament unvoiled. 
Fig. 1 0. Larva throwing out stolons, from one of which a bud is springing. 
Fig. 1 1. Larva having several buds growing from its surface. 
Fig. 12 . Upper half of a larva eight days after it had been cut across. 
Fig. 13. One of the forms assumed by some of the larvae. 
Plate VI. 
Fig. 14. Larva in the process of splitting into young Medusae. 
Fig. 15. Lower surface of one of the young Medusae after its separation 
from a larva ; a, one of the four bifid processes in the stomach ; 
c, ocellus. 
Fig. 16. Greatly enlarged view of one of the bifid processes in the stomach. 
Fig. 17. Greatly enlarged view of one of the eight marginal rays or lobes : 
a, ocellus. 
Fig. 18. Greatly enlarged view of the crystals in apex of ocellus. 
Fig. 19. Two of the nucleated cells and several of the nuclei that enter so 
abundantly into the structure of the internal layer, as seen when a 
portion of this layer is detached. 
Fig. 20. Small portion of a tentaculum, highly magnified, to exhibit the fili- 
ferous capsules adhering to its outer surface. 
Fig. 21. Representation Actinia cylindrica of the natural size. 
Fig. 22, Oral surface of one of the tentacula. 
In the examination of the more minute structures figured above, a one- 
eighth of an inch object-glass made by Powell and Leland, and a one-fourth 
of an inch object-glass by Smith and Beck, were employed. 
* Annals of Natural History, vol. v. p. 180. 
3 * 
