36 THE GENUS TRACHELOMONAS^ 



Tr. torta Kellicott, in Stokes, Iiifus. U. S., p. 87, P].l,f.24, 

 \^^'S = Crumenida texta Du].,^ Euglena viridis Vcivvsl form, c/! 

 Stein, T. xx., f.26. Stokes, in his figure, has put in the strise from 

 both sides of the test; there is only one set of stri?e, as shown by 

 Stein. I have often found these empty tests in mixed gatherings. 



Tr. piscatot^is (Fisher) Stokes, Journ. Trenton Nat. Hist. Soc, 

 1886; Infus. U. S., p.88, PLl, f.25, 18SS (Lagiincula ^nscatoris 

 Fisher, Proc. Amer. Soc. Micr., 1880), = 7'?-. hispida var. piscatoi'is 

 (Fisher) milii. 



7V. cervicula Stokes, Proc. Amer. Phil. Soc, p. 75, f. 1 1, 1890, = 

 7V. volvocina var. ceriiicula (Stokes) mihi. 



7V. similis Stokes, ibid., p. 76, i. 12, = Tr. euchloi'a var. si^nilis 

 (Stokes) mihi. 



Tr. ohovata Stokes, ihid., p. 76, f.l3 = Tr. eurystoma var. Stokesii 

 mihi. The name ^''obovata^' is unsuitable in the variation, as the 

 type itself and var. Klebsii, supra, are both obovate. 



Tr. volvocina var. minuta Lemm., Bot. Centralblatt, Bd. 76, 

 p. 152, 1898. Size not known, has probably been included here 

 with the type. 



Tr. layeiiella Dangeard, Les Eugleniens, p. 132, f.40, 1902 (not 

 Ehrenberg nor Stein), = Tr. oralis Playf., Biol. Richm. R., p. 141, 

 PL viii , f.4; but cf. Tr. teres Maskell. The decided neck, gener- 

 ally slanting, is characteristic of Tr. euchlora {layenella). Such 

 forms as depicted by Dangeard are just as likely to be smooth 

 forms of Tr. hisjnda (Stein, T. xxii., f.23), or Tr. armata, or Tr. 

 teres Maskell, without a neck. It is best to keep such forms by 

 themselves where possible. 



Foryns not yet obse7'ved here. 



The exact types were not observed of Tr. euchlora {lagenella) 

 (Ehr.) Lemm., I'r. armata (EXw.) Stein, Tr. caudata (EhY .) ^tQm, 

 Tr. acumiwda (Schmarda) Stein, Tr. bulla Stein, Tr. eurystoma 

 Stein, Tr. urceolata Stokes, Tr. Volzii Lemm., 7'r. elegantissi7na 

 (G. S. West) mihi, but only very similar forms. 



Tr. volvocina f3 rugulosa (Stein) Klebs, = Tr. rugulosa Stein, 

 I.e., f.l2, 13. Cy: Dangeard, ^.c, p.l28, f.39. A form of Tr. 

 volvocina with minute ridf^es in slanting lines across the surface. 



