A MONOGRAPH OP THE TERTIARY POLYZOA OP VICTORIA. 21 



2. C. longicollis, Waters, sp. PL II., figs. 23-25. 



Catenicella longicollis, Waters, Q.J.G.S., Aug. 1883, p. 132. 



Zooecia broadly cuneate ; below tlie thyrostome a long, narrow, elliptical space 

 surrounded by a narrow raised rim, and situated in a depression of tbe zocecium ; 

 this space occupied by a row of narrow bands on each side extending inwards to tbe 

 mesial line where they meet ; thyrostome rounded above, narrow or triangular 

 below, the peristome slightly raised ; lateral processes wide, with a gaping avicu- 

 larium opening outwards. Sometimes an avicularium on the inner summit of one 

 of the zooecia of a geminate pair. Posterior surface convex, smooth. 



Var. angusta. A single specimen (fig. 23) with the zooecia much narrower 

 and the lateral processes aborted or possibly broken off. 



M.C. 



The characteristic feature of this species is the suboral concave space with the 

 minute transverse ribs. These ribs are like, but very much smaller than those of 

 the front of Membraniporella, but the front formed by them is concave. 



3. C. obliqua, n.sp. PL II., fig. 26. 



Geminate zooecia inclined obliquely to each other; a raised portion of the 

 zooecium extending downwards from the thyrostome, bordered by a row of minute 

 pores ; thyrostome rounded above, with a denticle on either side separating a pointed 

 sinus, and several small pointed open tubes on its upper margin ; lateral processes 

 small, with a small avicularium opening backwards. 



M.C. 



I have only a single geminate pair of zooecia. It may possibly be C. longicollis, 

 but it differs in the obliquity of the zooecia, the elevation below the thyrostome and 

 the distinct, short tubular processes on the upper lip. 



4. C. marionce, n.sp. PL II., figs. 27, 28. 



Zooecia vase-shapecl or cuneiform ; connecting tubes very long ; anterior 

 surface smooth ; thyrostome round and wide above, with a triangular sinus below ; 

 peristome thickened above ; lateral processes usually large and supporting an avicu- 

 larium (frequently absent) on the outer edge, with the elongated triangular mandible 

 opening directly outwards or slightly backwards. Posterior surface raised towards 

 the mesial line, smooth. In geminate zooecia there is frequently a mark on each 

 side, close to the junction above, which seems in some cases to be a minute avicu- 

 larium. 



