FRESHWATER RHIZOPODS AND HELIOZOA. 325 
Gen. HyatospHenta, Stein. 
36. HYALOSPHENIA CUNEATA, Stein, Sitzwngsb. bohm. Akad. 
Wiss. 1857 ; Leidy, Freshw. Rhiz. N. Amer. 1879, p. 129, t. xx. 
ff. 1-10.—H. lata, Schulze, in Archiv fiir mikr. Anat. 1875, xi. 
p- 335, t. xvi. ff. 15-18; Archer, in Qu. Jour. Micr. Sci. 1877, 
p- 110. 
Cocket Moss, near Giggleswick, W. Yorkshire. Large speci- 
mens with a relatively broad mouth to the shell. Length of 
shell 75 »«; breadth of shell 60 1; breadth of mouth 81 ph. 
River Ballanderry near its entrance into Lough Neach, Ireland. 
Small specimens with a faint indication of a neck to the shell, 
the mouth of which is relatively small. Numbers of specimens 
were examined ina very active state, and each possessed two 
contractile vacuoles. The nucleus in these Irish specimens was 
comparatively small. Length of shell 56-62 1; breadth 40-44 pn ; 
breadth of mouth 138-14; thickness 16 p. (PI. 29. figs. 21, 22.) 
37. HYALOSPHENIA ELEGANS, Leidy, Freshw. Rhiz. N. Amer. 
1879, p. 140, t. xx. ff. 19-29.—Difflugia (Catharia) elegans, 
Leidy, in Proc. Acad. Nat. Sci. Philad. 1874, p. 156. 
This species I have only observed among Sphagnum at Cocket 
Moss, near Giggleswick, W. Yorkshire. 
LEPTOCHLAMYS, gen. n. 
Shell ovoid, slightly oblique, consisting of a thin, transparent, 
structureless, chitinoid membrane; narrower or ventral end of 
shell slightly produced and minutely expanded, terminating in a 
mouth which is often placed a little obliquely ; vertical view of 
shell circular; mouth circular. Protoplasmic body completely 
filling the shell; nucleus very large and situated dorsally. With 
a single, short pseudopodium, broadly expanded and sometimes 
cordate. Vacuoles entirely absent. 
38. LeEPTOCHLAMYS AMPULLACEA, sp. unica. (Pl. 29. figs. 23- 
26.) 
Small; body composed of finely granular protoplasm, con- 
taining a large punctate nucleus at the pole away from the 
mouth; both green and brown food-particles present in the 
body-protoplasm. With a single pseudopodium (sometimes 
a faint indication of two), well differentiated into a lobe of dull 
23* 
