24 Rev. T. Hincks’s Catalogue of Zoophyies 
This species, when growing on shells, is not uncommonly re- 
cumbent and adnate, and creeps over the surface like a Hzppo- 
thoa. It is-a curious fact that in this condition it assumes 
the mode of growth of the latter genus, and sends off branches 
from the sides of the cells. The aperture, too, is not distinetly 
marginated, as in the erect form. 
I have many specimens of this variety, which were dredged off 
the Isle of Man, where it is common on oyster and other shells. 
They form Hippothoa-like patches, and generally show the pro- 
cess, springing from the front of the cells (below the aperture), 
which marks the commencement of a branch or of an ovicelli- 
gerous cell. So completely are the habit and aspect of the 
Polyzoon changed in this repent variety, that it is difficult to 
recognize it under its disguise. When I first met with it, I had 
no doubt that I had obtained a new species of Hippothoa; but I 
have since found a specimen in which an erect shoot of the nor- 
mal character springs from the line of creeping cells. 
I have Scruparia chelata in the same condition from Australia, 
where the species is common. 
2. HiprotHoa, Lamouroux. 
1. A. catenularia, Jameson. 
Very common in deep water: spreads profusely over the 
Cornish Pinne from 60 fathoms. 
2. H. divaricata, Lamx. 
Very common: from between tide-marks (rarely) to deep 
water. Some of the most beautiful specimens which I have seen 
were spread over the smooth inner surface of the Pinna ingens. 
The variety Patagonica occurs on red weed at Sidmouth. 
[Hobson’s Bay, Australia. ] 
3. Aires, Lamouroux. 
1. 4. anguina, Linneus. 
Extremely common: on Algze (especially the red), Corallines, 
&c., in tide-pools, and the Laminarian zone. 
2. AL. truncata, Landsborough. 
On shells, apparently not common: Plymouth, &c. 
In his description of this species, Dr. Landsborough makes 
no mention of the curious spur-like processes with which the 
cells are often furnished. They spring from the back of the 
cell below the aperture, and are generally of considerable length. 
[ Ramsay, Isle of Man; common. ] 
