ZOOLOGICAL AND BOTANICAL ASSOCIATION. 87 



2. — Nellia (Busk). 

 1. — N. oculata (Busk). 

 Bass's Strait ; Dr. Harvey. 



3. — Onchopoba (Busk). 

 1. — 0. hirsuta (Lamx. sp. ?) 

 New Zealand ; abundant ; Dr. Joliffe. 



Family 3. — Cellulariadae (Busk). 

 1. — Cellulabia (Pallas). 



1 C. cuspidata (Busk). 



Abundant; Bass's Strait; Dr. Harvey. New Zealand; Dr. Joliffe. 

 A very variable species. In one form the spine on the median cell 

 at the bifurcation is absent, and in another there are two to three ori- 

 fices in the back of the cell. 



2. — Menipea (Lamx.). 



Cells oblong, abbreviated, or elongated and attenuated downwards ; 

 imperforate behind with a sessile lateral avicularium (frequently ab- 

 sent), and with one or two sessile avicularia (also frequently absent) on 

 the front of the cell. Ovicell globular, immersed in the internode. 



This genus requires careful revision. It is said to be distinguished 

 from Emma ( Gray) by the structure of the cell-mouth, which is sub- 

 triangular in the latter genus, the opening being partially filled up by a 

 tubercular calcareous plate ; and by the position of the lateral avicula- 

 rium, which in Emma is entirely below the cell aperture ; while in Me- 

 nipea it is seated, when present, on the upper and outer angle of the 

 cell. 



The two new species are so completely intermediate that I believe 

 I am justified in uniting the Emm© with the true Menipeae into what I 

 conceive to be a most natural generic group. M. ternata (Ellis) may be 

 taken as a type of the genus thus constituted. M. Fuegensis (Busk) 

 approaches it closely. The avicularia are still at the upper angle of the 

 cell, and the cell-lip is still simple. The operculum, however, is reduced 

 to a curved spine. In M. Buskii the lip is more projecting, and the 

 calcareous plate which partially covers the cell-mouth is tuberculated. 

 The lateral avicularium is slightly depressed, though still opposite the 

 upper third of the aperture. The opercular spine is again expanded. 



