ZOOPHYTES. 
19 
crabs, submerged sticks and branches. One of the most 
curious examples found by the fishermen in the bay consisted 
of a stout branch of a thorn-tree, about four feet in height, 
which had large specimens of Balanus Hameri and Ascidians 
clustered like living fruit on the main trunk and branches, and 
lobulated and club-shaped masses of Alcyonium covering the 
more slender twigs and overrunning the neighbouring Cirri- 
pedes; while Obelia fringed most of the branches, here and 
there giving place to the shorter coating of Sertularia , stunted 
Tubular ia, or the downy Clytia. Hosts of other animals 
occurred on the congenial site—tubes of Thelepus and Serpula, 
Anomia , Saxicava , Xylophaga , Lepralia , Cellepora , and Tubu- 
lipora representing the sedentary forms, sessile-eyed Crusta¬ 
ceans and Starfishes the free. Indeed the production formed 
a compendium of marine zoology that took much time and 
trouble to investigate. The rapidity of growth of the larger 
specimens (the Balani being as large as walnuts) was shown 
by the condition of the wood and bark, and the presence of 
many delicate twigs. This is also seen in the case of slender 
branches of the common currant-bushes, which are brought to 
land in good preservation yet densely fringed with Obelia 
longissima and studded with large ascidians. The zoophytes 
themselves are subject to many parasitic inroads from sponges, 
Foraminifera, other zoophytes, various Polyzoa, Ascidians, 
Nudibranchs and their ova, young mussels and Anomice , the 
ova of Pycnogonum , Annelids and their tubes (hyaline, gritty, 
and calcareous), and minute Cirripedes. 
In the following list the arrangement and nomenclature of 
the Kev. T. Hincks in his recent beautiful work on the 
Hydroida is adopted. 
Order I. Hydroida. 
Suborder I. ATHECATA. 
Fam. 1. Clavidae. 
Genus Clava, Gmelin. 
Clava multicornis , Forskal 5 Hincks, Brit. Hydroid 
Zoophytes, vol. i. p. 2 . 
Frequent under stones in pools near low-water mark, and 
D 2 
