20 THK GENUS TBACHELOMONAS, 



Var. SPLENDIDA, n.var. (PI. iii., f,4). 



Lorica dimidio prse forma typica longior, strictius cylindracea; 

 polis magis truncatis. 



Long. 45, lat. 20 /x. Botany 37. 



Var. ARCUATA, n.var. (PL iii., f.5). 



Lorica oblonga nee cylindracea ; lateribus arcuatis nee de- 

 planatis; polis late-rotundatis. 



Long. 20-27, lat. 14-17 /x. 



Botany 151; Lismore 236, 238. 

 Yar. CONICA, n.var. (PI. iii., f.6). 



Lorica a tergo paullo coniea. Long. 30, lat. 18 /x. 



Guildford 146; Lismore 237. 



Var. SUBDENTICULATA, n.var. (PI. iii., f.7). 



Lorica modice cylindracea, major quam forma typica; granulis 

 minutis acurainatis (psene denticulis) sparse ornata. 



Long. 36, lat. 22 fx. 



Lismore 240. Cum forma typica. 



It is doubtful whether this form should be placed under 7V. 

 australis or T7\ hispida, forms of the latter being granulate. Of 

 the two, only Tr. australis accompanied it in No.240, so I have 

 arranged it under that species. 



Trachelomonas hispida (Perty) Stein. (PI. iii., f. 8). 



Long. 26-29, lat. 19 /x, sine spinis. 



Lismore 238. 



According to Stein, I.e., T. xxii., f.20-34, the type is oval or 

 oblong, and covered with sharp-pointed spines. Such a form is 

 extremely rare in our waters; I find it only in No. 238, and 

 sparsely distributed even there. The dimensions, however, 

 agree exactly with those of Stein, whose figures work out at 

 29 X 20, 26 X 20, 26 X 1 7, 27 X 19 /x, &c. Tr. crenatocollis Maskell, 

 (Trans. New Zealand Inst., Vol.19, n.s., 1886, PI. iii., f.3) is an 

 oval form of Tr. hispida, with square, straight neck crenate at 

 the end, corresponding to Stein's figs. 21, 24. Tr. piscatoris 

 (Fisher) Stokes, Infus. U. S.,p.88, Fl, i.,i.2b{Lagu7icula piscatoris 

 Fisher, and Layuncula Kellicottiana Fisher, Proc, Amer. Micr. 

 Soc, 1880) is the corresponding oblong form. If both are re- 



