A MONOGRAPH OF THE TERTIARY POLYZOA OF VICTORIA. 21 



2. C. loiigicolJis, Waters, sji. PI. II., figs. 23-25. 



Catenicella longicollis, Waters, Q.J.G.S., Aug. 1888, p. 132. 



Zooecia bi'oadly cuneate ; below the thj'rostome a long, narrow, elliptical space 

 surrounded hy a narrow raised rim, and situated in a depression of the zoocciuni ; 

 this sjiace occupied by a row of narrow bands on each side extending inwards to the 

 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 jiair. Posterior surface convex, smooth. 



Var. (nir/Hsfa. A single specimen (fig. 23) with the zocccia much narrower 

 and the lateral processes aborted or possibly broken off. 



M.C. 



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

 minute transverse ril)s. Those ril)s are like, but very much smaller tlian those of 

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



3. C. ohliqua, n.sp. PI. II., fig. 26. 



Geminate zooecia inclined obli(|uely to each other; a raised portion of the 

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

 pores ; thyrostome rounded above, witli a denticle on either side sei^arating a pointed 

 sinus, and several small pointed ojien 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. lougicoUis, 

 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. marioHce, n.sp. PI. II., figs. 27, 28. 



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

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

 peristome thickened al)ove ; lateral processes usually large and su2)portiug 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 zoa3cia there is frequently a mark on each 

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

 larium. 



