Observations on British Zoophytes. 45 
spring. In my paper on Hydractinia, I have stated that the 
palpocil is a protrusion of the homogeneous and granular 
ectoderm and homologous with the prehensile processes of 
Actinophrys ; and in the different zoophytic orders and 
genera their shape resembles the same processes in various 
Actinophrian forms. Thus, in Coryne they resemble so 
exactly the almost invisible palpocils of minute specimens 
of Zooteirea, that it is impossible to distinguish between 
them. In Hydra and the creeping planulae of Hydractinia, 
they approach to those of Actinophrys. In Acanthobrachia 
they resemble the spreading lobular but still unbranched 
processes of some of the Khizopods. While in Gydippe, as I 
have lately observed, the palpocil assumes a perfect pseud o- 
podic type, being capable of complete retraction and rhizo- 
podic extension. 
(3) Atractylis hitentaculata (new. sp.), T. S. W. (Fig. 5.) 
" Polypary creeping, retiform. Polyps club-shaped, nearly 
sessile, non-retractile, minute, each furnished with two 
erect tentacles." 
Found on a Pecten shell dredged from the Firth of Forth 
near Inchkeith. The polyps of this zoophyte are very 
minute, and thickly clustered on a retiform polypary. They 
have the habit somewhat like that of Lar (Gosse), of 
quickly bending down the body until the mouth is brought 
close to the surface on which the zoophyte grows. 
(4.) Atractylis quadritentaculata (n. sp.), T. S. W. (Fig. 6.) 
Polypary creeping. Polyps, sessile, columnar, non-re- 
tractile, short. Tentacles, alternate, four ; two long 
and depressed ; tw^o short, and nearly at right angles to 
the stem of the polyp. 
This was found creeping along the side of a large vessel 
of sea- water, containing shells and zoophytes dredged from 
the Firth of Forth near Edinburgh. The two long tentacles 
were depressed, so as to touch the glass to which the zoo- 
phyte adhered. The shorter tentacles were occasionally 
absent. The bodies of the polyps were enveloped in a ball 
of extraneous matter adhering to a coat of glutinous colleto- 
