36 
MARINE FAUNA OF ST. ANDREWS. 
* 
Order I. Zoantharia. 
Suborder ACTINARIA. 
Fam. 2. Sagartiadae, Gosse. 
Genus 1 . Actinoloba, Blainville. 
Actinoloba dianthus , Ellis; Gosse, Brit. Anem. p. 12, 
pi. 1. fig. 1. 
[Plate I.] 
Common in the debris of the fishing-boats, and thrown 
ashore after storms attached to sticks and shells. Young spe¬ 
cimens (Plate II. fig. 8, and woodcut, p. 39) occasionally 
appear on stones at extreme low water, and when very 
hungry greedily swallow green seaweeds. Some expand 
the disk like a Doris or Lamellaria , and float on the surface 
of the water. 
Genus 2. Sagartia. 
Sagartia troglodytes , Johnston; Gosse, Brit. Anem. p. 88, 
pi. 1. fig. 3, pi. 2. fig. 5, &c. 
Everywhere abundant under stones, and attached to rocks 
near low-water mark. In regard to the physiology of the 
digestive sac, Mr. Gosse * states that the walls of this chamber 
are only separated for the reception of food; but in this species 
the mouth often expands, and the digestive cavity dilates so 
as to be readily viewed as an open and empty sac. The 
ciliary currents course over the lip and into the stomach; so 
that minute particles of nutriment might be available, though 
by no means necessary. 
Fam. 4. Actiniadae. 
Genus 1. Actinia, L. 
Actinia mesemlryanthemum , Ellis & Sol.; Gosse, Brit. Anem. 
p. 175, pi. 6. figs. 1-7. 
Very common on stones and rocky ledges between tide- 
marks. 
# Brit. Anem., Introd. p. xvi. 
