680 
PROTOZOA, 
(g. n.) helicina ; a third, from the walls of the intestinal tube in Octopus 
vulgaris^ Benedenia (g. n.) qctopiana. 
Among the Gregarinidce^ Schneider (3) describes the following genera 
and species (the diagnoses of the former cannot be reproduced for want 
ofspace):— 
Stylorrhynchus (Stein., pt.) oblongatus (Hamm.), 1. c. p. 569, pi. xviii. 
figs. 1-13 (intestine of CoUopterd) ; longicollis, sp. n., p. 572, pi. xix. 
figs. 1-9 {Blaps mortisaga). 
Clepsidrina (Hamm., pt.) mwnieri^ sp. n., p. 574, pis. xvii. figs. 1-10, 
xxi. fig. 5 (Timarcha tenehrioosd) ; ovata (Duf.), p. 578, pi. xvii. figs. 
13-15 {Forficula auricularis ; blattarum, Sieb., p. 580, pi. xvii. figs. 
11 & 12 {Blatta orientalis) ; polymorpha, H., p. 580, pi. xx. figs. 1-19 
{Tenebrio molitor, larva). 
Euspora (g. n.) fallax^ sp. n., p. 583, pi. xviii. figs. 14-17 (JRhizotrogus 
cestivus ?, larva). 
Hyaloapora (g. n.) roscoviana, sp. n., p. 584, pi. xvi. figs. 41 & 42 {Pe- 
trobius maritimus). 
Stenocephalus (g. n.)juli (Leidy), p. 584, pi. xx. figs. 29 & 30 (Julus sa~ 
bulosus, terrestris). 
Poroaporq, (g. n.) gigantea^ V. B., p. 585, pi. xviii. figs. 18 & 19 (the 
lobster). 
Gamocystis (g. n.) tenax, sp. n. p. 587, pis. xix figs. 10-13, xxi. fig. 6 
{Blatta lapponica'). 
Actinocephalua (St.) stelliformia^ sp. n., p. 588, pi. xvi. figs. 32-34 & 
45 {Coleoptera) \ dujardini, p. 589, pi. xvi. figs. {Lithobius forci- 
patus ) ; digitatus, sp. n., p. 590, pi. xvi. fig. 35 {Chlcenius vestitus). 
Hoplorhynchus (Oarus) oligacanthus, St., p. 591, pi. xvi. figs. 25-31 
{Callopteryx virgo, larva). 
Pileocephalus (g. n.) chinensis, sp. n., p. 592, pi. xvi. figs. 21-24 (larvae 
of Mystacidce). 
Echinocephalus (g. n.) hispidus, sp, n., p. 593, pi. xvi. figs. 36-40 (Li- 
thobius forcipatus). 
Geneiorhynchiis (g. n.) monnieri, sp. n., p. 595, pi. xx. figs. 21-27 (larvae 
of dragon-flies). 
Duf our ia (g. n.) agilis, sp. n., p. 595, pi. xxii. figs. 1-6. 
Bothriopsis (g. n.) histrio, sp. n., p. 596, pi. xxi. figs. 8-13 [Hydaticus^ 
Colymbetes, &c.). 
Urospora (g. n.) nemertis (K611.), p. 597, pi. xxi. figs. 2-4 (Valencinia). 
Gonospora (g. n.) terebelke (K611.), p. 598, pis. xix. figs. 14-16, xxi. 
fig. 1 (Audouinia, Terebella). 
Adelea (g. n.) ovata, sp. n., p. 598, pi. xvi. figs. 1-7 {Lithobius for- 
cipatus). 
Schneider (/. c) distinguishes between the following layers, &c., in 
the Gregarinidcs: (1) the “ epicyte,” (2) the “ sarcocyte,” (3) the “myo- 
cyte (4) the “ endocyte,” (5) the nucleus and nucleolus, (6) the septa 
(7) the appendicular organs (hooks, &c.) at the anterior extremity. The 
sarcocyte however may be absent (not separable from the endocyte), and 
the fibrillary element of the sarcocyte also may be undeveloped. The 
contractility does not reside in the “ myocyte,” and is quite iudepeiideut 
