RHIZOPODA. 
575 
siona of the endosarc. Posterior part of body furnished with one or 
more tufts of non-retractile rigid linear appendages branching radially 
from points in the vicinity of the contractile vesicle.” U. vorax and hotu- 
licauda (fig. p. 127). 
Ammha viridis and tentaculata, sp. n., Leidy (9,a) p. 167 (New Jersey). 
Note on A. quadrilineata^ Cart., “On supposed spermaries in 
Amceha” 1. c. p. 168. 
Trichamceha, g. n., Fromentel, Microz. [sw^rd, p. 571] p. 222. Scarcely 
diffluent AmcehcB with profound changes in the shape of the body ; tegu- 
ment totally or partially covered with stiff, non-vibratile cilia. T. radiata 
and hirta^ 1. c. p. 345, pi. xxviii, figs. 1 & 4. 
Thecamceba^ g. n., id. 1. c. An oval cuirass or thickened integument, 
divided longitudinally into 4 mobile portions, covers the back of the ani- 
malcule; contractile vesicle highly developed. T. quadripartita^ 1. c. 
p. 346, pi. xxviii. fig. 3. 
Psammosphcera., g. n., Schulze. Smooth globules (2-4 mm.), free or 
fixed to stones, without orifices, with a solid shell formed of sand grains, 
cemented together by a finely granulated substance. P. fusca, sp. n., 
id. (12) p. 113, pi. i. fig. 8. 
Abstracted remarks by Archer on Heterophrys (= Nuelearia^ accord- 
ing to CiENOWSKi, 5, p. 43), Acanthocystis, Rhaphidiophrys, Plagio- 
phrysj Pamphagus^ and Uramce,ha\ Q. J. Micr. Sci. xv. pp. 202, 203, 
& 331. 
StorthosphcBra^ g. n., Schulze. Hollow globules, containing a finely gran- 
ular soft substance ; crust formed of small sand grains, and produced 
into numerous irregular conical processes. S. albida, sp. n., id. 1. c. fig. 9. 
AstrodiscuSj g. n., id. Flat disc-shaped bodies, with the margin pro- 
duced into several short processes, open at the extremity ; crust com- 
posed of minute sand granules cemented together; internal sarcode 
continued through the marginal processes in the shape of delicate dicho- 
tomical ramifications. A. arenariuSy sp. n., id. 1. c. fig. 10. This genus 
(Norman, P. R. S. xxv. p. 212) is identical with Astrorrhiza of Sandall 
(1857), as is also Hcechelina of Bessels (2) (Carpenter, Q. J. Micr. Sci. 
XV. p. 294). According to Fischer (6), Astrorrhiza was described in . 
1870, under the names oi Arenistella (Fischer & Folin), and Ammodiscus^ 
Carpenter. “H. gigantea*' was found abundantly in Black-Island- 
Sound (Connecticut), in relatively shallow water. Bessels observes that 
the distal portions of the radiating processes, though not retractile, are 
naked, uncovered by the shell, and give off the pseudopodia from their 
extremities ; he has also found that the individual “ sand-stars ” are con- 
nected into Myxodiciyum-\i\iQ colonies, covering large portions of the 
sea-bottom. Specimens from the same locality are correctly described 
as Astrorrhiza limicola, Sand., by Leidy (9, 5), who also briefly men- 
tions the occurrence at the same locality of several arenaceously- or 
calcareously-shelled polythalamous Foraminifera. 
Quadrula, g. n., Schulze. Type, Q. symmetrica {Difflugia symmetrica, 
Wallich) (11), p. 329, pi. xviii. figs. 1-6. Shell composed of quadratic 
plates, otherwise Si^ iwDifflugia. A nucleus with nucleolus, 1 or 2 pulsating 
vacuoles, digitiform pseudopodia, &c. 
