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 ETydractinia, 

 they approach to those of Actinophrys. In Acanthobrachia 

 they resemble the spreading lobular but still unbranched 

 processes of some of the Ehizopods. While in Cydippe, as I 

 have lately observed, the palpocil assumes a perfect pseudo- 

 podic type, being capable of complete retraction and rhizo- 

 podic extension. 



(3 ) Atractylis bitentaculata (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 Lav (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 T 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- 



