360 Rey. T. Hincks’s Contributions towards a 
Microporella Fuegensis, Busk. 
Range. Tierra del Fuego. 
A small erect and branched specimen of this species occurs. 
The suboral pore presents some peculiarities. It is placed 
immediately below the rim of the orifice in front, and is only 
found in the adult cell. In the marginal zocecia the orifice is 
suborbicular and the peristome not elevated; but in a more 
advanced stage the peristome rises considerably round the 
back and sides of the orifice, but not in front, the result being 
that a sinus is formed here. In a still more advanced stage 
the margin of the side walls of the peristome is extended 
across the upper part of this sinus, forming a narrow rim, and 
converting the open fissure into a circular pore, which com- 
municates directly with the interior of the tubular peristome. 
It is evident that this is a very different structure from the 
ordinary pore of the Microporelle, as it occurs in MV. ciliata 
and M. Malus’, where it opens into the interior of the cell 
itself, and must be placed in a very different category. 
Family Myriozoide (part), Smitt. 
SCHIZOPORELLA, Hincks. 
Schizoporella biaperta, Michelin. 
The single specimen which occurs is crustaceous in habit 
and referable to the form divergens of Smitt. It is furnished 
with large spatulate avicularia as well as the small circular 
form so characteristic of the species; the walls of the cell are 
smooth and white. The ocecium is very unlike that figured 
by Smitt for his Hippothoa (Schizoporella) braperta ; and this 
dissimilarity, in conjunction with the difference in the shape 
of the orifice, may prove that he was right in regarding the 
form divergens as a species. The ovicell in Dr. Anderson’s 
specimen (which is a very typical example of Smitt’s S. di- 
vergens) is small, rounded, and thickly covered with raised 
punctures ; the opening is closed by the oral operculum of the 
cell. 
Family Escharide (part), Smitt. 
LEpPRALIA, Johnston (part). 
Lepralia robusta, n. sp. (Pl. XIII. fig. 4.) 
Zowcia very large, ovate, quincuncial, flattish, separated by 
arather deep furrow, which is occupied by a line of large 
