Observations on British Zoophytes and Protozoa. 275 
suspended or floating in an erect position, or slowly swims 
about in large curves by the continuous and very active 
motion of its tentacles. This animal may be called the 
homomorph, amongst the Protozoa, of Sipunculus Bernhardi. 
I have never been able to satisfy myself as to its mode of 
feeding, though portions of matter are occasionally seen 
entangled amongst the tentacles, and apparently pressed in 
contact with the substance of the proboscis. 
In the sketch of this animal appended to my notice of 
1859, 1 figured several globular bodies within the sac, which 
my friend, M. Claparede, to whom I showed it, had not 
observed ; and on further observation, I was led to consider 
the figure erroneous. In March last, however, the Ophryo- 
dendra (PI. XI. fig. 1) again contained these bodies, and by 
a somewhat "meddlesome midwifery," I was enabled to 
force them from the sacs, and to find that they were living 
young, from four to nine in number. 
The young thus obtained consist of ovoid bodies of higher 
refractive structure than the body of the parent, and contain 
olive-brown corpuscles, shaped like the chlorophyll-granules 
of Hydra viridis. At a later stage, when the wrinkled 
trunk of the parent hung lax and dead, the young larv99 
assumed a pyriform shape, flattened on their inferior surface 
(PI. XI. fig. 2). This surface was also marked with longitu- 
dinal striae, carrying short, soft, slowly- moving cilia or pro- 
cesses. Their natural mode of extrusion was not observed ; 
but several families of them were found, each enveloped in 
a soft gelatinous ball, and attached to the Sertularia and 
other bodies. Single individuals were seen slowly moving 
on the zoophyte, and others attached were putting forth the 
rudiments of the proboscis. The proboscis was at first finely 
molecular, like the contents of the sac, unwrinkled and non- 
contractile. A few tentacles were presently put forth from 
its summit (fig. 3), and it gradually assumed the structure 
of that of the adult. 
The body of Ophryodendron frequently bears fusiform 
bodies, from one to four in number, which I have already 
described, and which appear to be gemmae. 
VOL. 11, 
