Tertiary Polyzoa of Victoria. 21 



Ditaxipopa internodia, Waters, sp. 



I wish to note that I have found specimens of this species 

 which agree with Mr. Waters' description (Q.J.G.S., Aug., 1881, 

 p. 318) in having an oval space below the thyrostome, formed 

 by the spreading out of the central band and a pore in it, which 

 were apparently not present in the specimens which came under 

 Dr. Macgillivray's notice. I have also found some which agree 

 with tlie description in the Monograph. They must be con- 

 sidered as varieties merely ; there is not sufficient difference 

 between them to justify specific separation. 



I include in this paper a description and figure of a very 

 interesting form, which, though not belonging to the Catenicellidce, 

 I wish to bring under notice now, on account of its very extraor- 

 dinary nature. 



Schizopot^ellopsis, nov. gen. 



Zocecia of two forms in longitudinal series. Upper zocecium 

 elongate ; thyrostome subcircular ; sinus in lower lip. Lower 

 zooecium oval ; thyrostome semicircular, no sinus in lower lip. 



Schizoporellopsis abnopmis, n. sp. (PL II., Fig. 13). 



Upper ZooBcium elongate, front granular, perceptibly convex 

 over a large oval area below the thyrostome ; margin thickened, 

 extending upwards to the middle only of the thyrostome ; 

 thyrostome subcircular with a sinus in the lower lip ; peristome 

 thin, raised. Lower zocecium oval, somewhat pointed below ; 

 margin thick ; central area depressed ; surface granular, with a 

 small circular area, slightly elevated in the lower part ; thyrostome 

 arched above, straight below, without any sinus. 



Z^^a//(y.— Muddy Creek. (T. S. Hall). 



This is a very puzzling form, as it consists of two zooecia which, 

 if separate, would be relegated to ditierent genera, or, indeed, 

 famiiies. I have examined it most carefully ; there is no doubt 

 as to the continuity of the cell walls, and the zooecia are in the 

 same plane, not one superposed upon the other. I have found 

 only the specimen figured. It apparently forms a connecting 

 link of a very peculiar nature between the families of Schizo- 

 porellidse and Microporidfe. 



