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BY G. I. PLAYFAIR. 13 



Trachelomonas cylindrica Ehr. (PI. i., f.28, 29). 

 Lorica smooth, cylindrical with parallel ^.^^ 

 sides, broadly rounded behind, more or 

 less shouldered in front, but our forms 

 are not generally so rectangular as those 

 figured by Stein, with a low ring-shaped 



neck. 



T 1 ^ nrv 1 J o 1 rv 11 li. 1 FiS-3. — Tr.c'yli7idrica'Ehv., 



Lonff. 16 20, lat. 8-10: coll. alt. 1, ° ^_^ f o. • 

 * ' ^ ' x6oO, after Stein, 



lat. 3 fx. 



Botanic Gardens 3; Auburn 120; Botany 142, 145, 152; Lis- 

 more 236, 237, 241, 242. 



Yar. decollata, n.var. (PI. i , f.30). 



Lorica levis, cylindracea, plerumque latior; coUo nullo. 



Long. 16-20, lat. 8-10 /x. 



Botanic Gardens 3. 



Var. punctata, n.var. (PI i., f.31). 



Lorica major, punctata, fronte posticeque vulgo late-rotundata; 

 collo brevi humillimo. 



Long. 26-38, lat. 12-14; coll. alt. 1, lat. 4 /x. 



Botany 142, 152; Lismore 242. 



This form is not only punctate, but larger than the type, the 

 breadth of which is commonly about 8 /x, while var. punctata is 

 just as regularly about 12/x. 



Trachelomonas pulcherrima, n.sp (PI. i., 132, 33). 



Lorica levis, candore carnoso, anguste-elliptica; apicibus late- 

 rotundatis; lateribus leniter arcuatis; collo humillimo aut nullo. 



Long. 20-26, lat. 9-12; coll. alt. 1-2, lat. 4 /x. 



Centennial Park 11; Botany 91, 151, 152; Lismore 240, 241, 242. 

 Var. latior, n.var. (PI i., f.34, 35). 



Lorica levis sed ssepe punctata," prse forma typica latior, sequali- 

 ter elliptica; apicibus late-rotundatis; collo plerumque nullo. 



Long. 20-27, lat. 12-14 /.. 



Botany 151; Lismore 236, 237, 238, 245. 



Differs from the type principally in its relatively greater 

 breadth; long. :lat. = 1*5 to 1'8 : 1 but, in the type, 2-0 to 2-4 : 1. 

 The neck also is generally wanting and the lorica often punctate. 



