134 Descriptions of New, 



cells. There are no external ooecia, as in 2Iicroporella, but 

 the ova seem to be developed in specially modified zooecial 

 cells (not, however, yet observed in some of the species), and 

 all the avicularian mandibles (whether from the avicularian 

 cells or from the zooecial avicularia) have a small process at 

 each articular angle which, so far as is at present known, is 

 confined to this family. Busk's Adeonella, however, ought 

 to be divided into two, the Adeonellce proper, where the pore 

 is external ; the other where it is zooecial (opening into the 

 cavity of the cell). The species here described belong to the 

 second group, to which the generic name Adeonellopsis may 

 be given. It would include also Eschara mucronata (M f G.) 



Adeonellopsis foliacea, n. sp. Plate II., fig. 1. 



Zoarium large, foliaceous, lamina twisted so as to form a 

 cellular mass. Zooecia rhomb oidal, quincuncial, separated 

 by distinct grooves : surface pitted, a median pore or pores 

 (when fresh obscured by the epitheca) ; mouth arched above, 

 straight below ; a median avicularium below the mouth, 

 with the mandible pointed directly upwards and projecting 

 beyond the lower lip, and one smaller on each side (occa- 

 sionally absent), directed inwards and slightly downwards. 

 Ooecial cells very large, convex, pitted and tubercukted like 

 the ordinary cells. 



Westernport, Mr. J. B. Wilson. 



Mr. Wilson has also sent me a variety in which the 

 zoarium is not foliaceous and cellular, but with branches 

 narrower, anastomosing, and much twisted. The zooecial 

 characters, however, are identical ; Both forms attain a large 

 size, the specimen of the first, which is broken, measuring 

 6 in. x 5 in., with a depth of nearly 4 in. 



A. latipjuncta, n. sp. Plate II., fig. 5. 



Zoarium expanded, foliaceous, simple or convoluted. 

 Marginal cells convex, with a large circular area on the front, 

 occupied by a cluster of 6 — 10 fimbriated pores: mouth 

 arched above, slightly hollowed below. Older cells with 

 the edge much raised, leaving the perforated area in a 

 depression. A large central avicularium below the mouth 

 with the long narrow mandible pointed directly upwards. 

 Colour, yellowish brown. 



Port Phillip Heads. 



