156 On the Polyzoa of the St. Lawrence. 
Porella concinna, Busk (granular vavr.). 
(Pl. VIE. tig. 6.) 
I have already referred to the variability of this species in 
superficial character. The figure represents a highly granu- 
lar form, which I had supposed to be (probably) the Lepralia 
Belli of Sir J. W. Dawson *. The latter indeed is described 
as having a sinuated orifice, a character which does not be- 
long to any variety of P. concinna. Still it seems more than 
probable, taking all things into consideration, that L. Belle 
is nothing more than a form of this variable species. Speci- 
mens are of common oceurrence in which the cells are 
separated by a distinctly “sinuous furrow,” which is one of 
the diagnostics of Sir W. Dawson’s species. 
Cellepora canaliculata, Busk. 
Cellepora canaliculata, Busk, ‘Challenger’ Report, part i. p. 204, pl. xxx. 
fig. 6. 
This species seems to be not uncommon, It forms small 
nodular masses, which incrust the stems of Hydroida. It 
was first obtained on the ‘ Challenger’ voyage in the neigh- 
bourhood of Halifax, Nova Scotia, in 51 fathoms. 
The owc’um was not observed. It is globose, of compara- 
tively large size, much broader than high, rather prominent 
in front, oral arch wide and shallow, surface smooth, shining, 
entire. 
Lagentpora spinulosa, Hincks. 
Lagenipora spinulosa, Hincks, “ Polyzoa of Queen Charlotte Islands,” 
p- 51 (sep.) and 40: ‘Annals,’ ser. 5, vol. xiii. pl. i, fig. 4, and pl. ix, 
fig. 4. 
This very interesting form occurs abundantly. It has 
only been noticed previously amongst Dr. G. M. Dawson’s 
dredgings from the Queen Charlotte Islands. It is probably 
an Arctic form. The St.-Lawrence specimens hitherto met 
with are all crustaceous in habit, overspreading the stems of 
Hydroida. The erect branching form obtained at the Queen 
Charlotte Islands has not occurred. 
Smittia Landsborovit, Johnston. 
There has been some confusion about this species, and the 
identification is not always to be trusted, Smitt has ranked 
* ‘Contributions to Canadian Natural History,’ by W. 5S. M. D’Urban 
and Robert Bell; Polyzoa, p. 52. (Extracted from the Report of the 
Geological Survey for 1858; Montreal, 1860.) 
