86 buitjsh freshwater ehizopoda. 



Synopsis oj? thk Biutish Spkcies. 



Test ovoid, tapering botli in broad and narrow views 

 towards the aperture ; formed of easily distinguishable circular 

 plates. (1) T. enchelys. 



Test elongate, small, usually homogeneous in appearance. 



(2) T. lineare. 

 Test in broad view of nearly equal width, with semicircular 

 ends, and formed of well-marked circular plates. 



(3) T. complanatum. 



1. Trinema enchelys (Blirenberg) Leidy.* 



(Plate XLVII, figs. 1-10 ; PI. XL VIII, figs. 1-3 ; 

 and figs. 162 and 153 in text.) 



Difflngia enchelys 



Ehrenbbbg (pars) Infusionsth. (1838), p. 132, pi. ix, f. 4 a, 6. 

 Peitchard (pars) Hist. Infus. (1842), p. 168 ; ed. 2 (1845), p. 168 ; 



ed. 3 (1852), p. 208 ; ed. 4 (1861), p. 553, pi. xxi, f. 19. 

 Gettbee in Zeits. wiss. Zool. XXXVI (1891), p. 15. 

 Arcella enchelys 



Ehrbnbeeg in Ber. Akad. Berlin, 1844, pp. 256, 338 ; op. cit. 1845, 



pp. 138, 146, 148, 170, 319 ; in Abli. Akad. Berlin, 1847 (1849), pp. 



444, 460, pi. i, II, f. 63 ; pi. vi, iii, f. 64 ; Mikrogeol. (1854), pL xiv, 



f . 96 6 ; pi. xxxix, II, f . 4. 

 Pbety in Mitth. nat. Ges. Bern, 1849, p. 155 ; Kenntn. kleinst. 



Lebensf. (1852), p. 187. 

 Trinema acinus 

 DujAEDiN Hist. Zooph., Infus. (1841), p. 249, pi. iv, f. 1. 

 Peett Kenntn. kleinst. Lebensf. (1852), p. 187. 

 PuEKYNE in Ziva, III (1855), p. 212, f . 2 (4). 



Febsenius in Abli. senckenb. nat. Ges. II (1858), p. 223, ff. 25-27. 

 OiAPAREDE & Lachmann l^tudes Inf. et Rliiz. I, 2 (1859), pp. 453- 



456. 

 Peitohaed Hist. Infus., ed. 4 (1861), p. 556. pi. xxi, f. 9. 

 Aechbe in Qrt. Jrn. Micr. Sci. (n. s.), VII (1867), p. 174; op. cit. 



XIV (1874), p. 107; in Proc. Dubl. Micr. OJub, I, 2 (1868), p. 118; 



op. cit. II, 3 (1875), p. 301. 

 Baekbe in Qrt. Jrn. Micr. Soi. (n. s.), VIII (1868), pp. 188-189 ; in 



Proc. Dubl. Micr. Olub, I, 4 (1870), p. 181. 

 Hbetwig- & Lessee in Arch. mikr. Anat. X (1874), Suppl., pp. 119- 



121. 

 ScHULZE in Arch. mikr. Anat. XI (1875), pp. 104-106, pi. v, fe. 9-11. 

 Eteeeth Einfach. Lebensf. (1878), p. 34. 

 Leidy in Proc. Acad. Pliilad. 1874 (1875), p. 227 ; op. cit. 1877 (1878), 



p. 321. 

 Geubee in Zeits. wiss. Zool. XXXVI (1881), p. 122, pi, iv, fe. 2, 3. 



* Many of the references given under this species may record Trinama 

 lineare Penard. Even when figured it is not always possible to identify 

 the species. Some doubt may also attach to a few of the references under 

 T. lineare. 



