THE ZOOPHYTES. 155 



Actinia crassicornis. This is the largest of our native Actinias, 

 often attaining four or five inches in diameter. 



Actinia Bellis. A beautiful but very diminutive species, 

 variable in appearance and colours. We have been so 

 fortunate as to obtain it once in this locality. The colour 

 is a compound of bright red, white, and ashy grey, with 

 a few yellow spots. Abundant on the Cornish coast, and 

 probably in other places, but, as it is mostly hidden from 

 view by sea-weed, it escapes general observation. 



Actinia Dianthus. This beautiful species is very rarely found 

 on this coast ; we have only met with two or three, and 

 then in an injured state ; they were attached to stones, 

 much bruised, and scarcely evinced any signs of life ; 

 they were enabled to retract their external fringe, except 

 partially. 



Tubulipora serpens (Small Purple Eschara). Found abundantly 

 on the shore, growing on various zoophytes ; in consider- 

 able quantities on Plumularia falcata, Sertularia abietina, 

 and numerous other species, as well as on shells thrown 

 ashore from deep water. 



Crisia eburnea (Tufted Ivory Coralline). On sea-weeds and 

 other zoophytes, forming beautiful little tufts of a clear 

 white colour, frequently in strong contrast with the 

 substance on which it is parasitical. 



Crisia denticulata. Larger than the preceding, from which 

 it is principally distinguished by the black joints, though 

 these are not always evident. 



Gemellaria loriculata. An abundant species, found at all times 

 on the shore on the receding of the tide ; varies from three 

 to eight inches or more in height, growing in dense tufts. 



