14 Transactions. — Zoology. 



On Confervai, Hutt Valley, W. M. Mashell. 



Nearest, perhaps, to C. imberbis, Ehrenb., but the form of 

 the lorica is quite different. 



Cothumia amphorella, sp. nov. Plate III., fig. 21. 



Lorica transparent, vase-shaped, ovate posteriorly, tapering 

 regularly to the margin, which is narrow and not everted ; 

 pedicle very short and slender. Animalcule whitish, occupying 

 about half the width of the ovate portion of the lorica and all 

 the margin, but not projecting when extended except by the 

 peristome-edge, wbich is rather thick and slightly recurved. 

 Contractile vesicle single, below the peristome ; nucleus elongate, 

 sub-central. 



Length of lorica (including pedicle), 3^ inch = 66 /x; length 

 of pedicle, 6S * 0Q inch = 3-8 ll. 



On Conferva}, Lyall Bay, W. F. Barraud. 



The form of the lorica, aud the fact that the animalcules do 

 not project beyond the margin, distinguish this species. 



Genus Platycola. 



Platycola decumbens, Ehrenb., var. intermedia, var. nov. Plate 

 III., fig. 22. 



Lorica dark-brown, smooth, oval, decumbent on aquatic 

 plants, produced anteriorly in a very short bent neck, of which 

 the margin is simple aud not at all recurved. Animalcule 

 white, protruding when extended nearly half its length beyond 

 the orifice of the lorica. Peristome-edge aud ciliary disc not 

 much wider than the body. Contractile vesicle single ; nucleus 

 not sufficiently observed. Very often two animalcules (as in 

 fig. 22) occupy the same lorica. 



Length of lorica about -. 2 } m inch = 125 /x. 



Wellington, C. P. Powles. 



Tbis variety is rather larger than Ehrenberg's original form, 

 and has a distinct neck, which is much shorter and less recurved 

 than in P. longicollis, already reported (1886). 



Order. Hypoteicha. 



Genus Phascolodon. 



Phascolodon elongatus, sp. nov. Plate III., fig. 28. 



Animalcules free-swimming, persistent in sbape but fre- 

 quently bending upwards at the anterior end ; more or less 

 shovel-shaped, broad in front, tapering posteriorly to a point ; 

 colour white ; ventral surface concave and ciliated ; dorsal sur- 

 face much inflated over half its area from the posterior end, not 

 ciliated ; cuticle distinctly striated. Pharynx sub-central, tubu- 

 lar, with conspicuous rods. Contractile vesicles two, one on 



