64 
ON THE CHARACTERS OE THE GENUS LOPHOPUS. 
wide, mainly composed of a large nucleus, which contains a 
nucleolus, itself about ‘002 millim. broad. 
These cells are not described by Allman {Joe. cit.) or in Hyatt’s 
papers (Proc. Essex Institute, vols. iv. & vi.), nor have I seen them 
noticed in any other paper which I have met with. Their form 
would seem to assign a mesodermic origin to them, but hitherto 
no overlying tissue has been found, to represent the ectoderm. 
Floating Apparatus of the Statoblast.— The cellular structure 
of the annulus of the statoblast in those forms in which it is 
developed resembles that of the gemmule of true Spongillidce, 
as elucidated by the researches of Carter, Marshall, and Vej- 
dowsky, so strongly that it only requires to be pointed out in 
order to be recognized. 
Australasian Species of Freshwater Folyzoa. 
The only Australasian species of Freshwater Polyzoa recorded 
by Jullien (/. c.), and by Hutton, in his ‘ Catalogue of the Marine 
Mollusca of New Zealand,’ is Flumatella Aplini of Macgillivray. 
A form assigned to Flumatella repens , var. a of Allman, is, however, 
described by A. Hamilton from near Napier in New Zealand 
(Traus. New Zeal. Inst. xii. p. 302 ) ; and Mr. Whitelegge is stated 
to have exhibited the same species, Flumatella repens , and Frecle- 
ricella sultana , from New South Wales, in Proc. Linn. Soc. N. S. 
Wales, viii. (1883) pp. 297, 416. The genus Lophopus does not 
appear to have been hitherto recorded from Australasia. 
DESCRIPTION OF PLATE II. 
Fig. 1. Lophopus Lendenfeldi, n. sp. Part of the colony, attached to plant- 
stem, showing a subspiral arrangement of the zoarium. Natural size. 
2. Part of the zoarium, showing zooids in different states of contraction 
or expansion, a. Hyaline (? cuticular) layer observed at termination 
of body of polypides. b. Food-mass in alimentary canal. X 40 diam. 
3. Portion of the ectocyst, to show structure as exhibited by staining with 
borax carmine, a. Stellate cells ; b. Globose cells. X COO diam. 
4. A statoblast, showing: a, annulus; b, body; c, blastodermic cells*? 
X 60 diam. 
N.B. These figures are somewhat schematized, except as regards essential 
details. 
* These bodies appear to consist mainly of refractive gi’anules and of a 
large nucleus. Perhaps they represent an early stnge in the division of the 
germ-cell. 
