as Infusoria flagellata. 263 
animal in profile, showing the peculiar attitude and curve of the 
flagellum (72), the narrow aperture (c*) of the calyx (¢), and the 
unilateral attachment of the retractor muscle ( ae the pedicel 
(pd) is just beginning to develope, 950 diam. Fig. 33>, a young 
form partially emerged from the bottom of the calyx (c), the 
latter contracted at the mouth (c!) and the flagellum (/) 
forcing its way through, as is usual, in a loop, 950 diam. Fig. 
38¢, the same as fig. 33%, retracted to the bottom of the calyx (c) 
and the aperture (c') of the latter nearly closed, 950 diam. 
Figs. 34, 35. Bicoseca gracilipes, n. sp. Fig. 34, the longitudinal furrow 
(71) and the flagellum (7/7) next the eye, the lip (dp) in the back- 
ground, 1900 diam. Fig. 35, the body retracted to the bottom 
of the calyx (c) and the flagellum beginning to uncoil, 950 diam. 
Fig. 36. Codoneca costata,n. sp. The body seated in the bottom of the 
pedicellated calyx (c), 950 diam. 
Figs. 37, 37*, 37°, 37°, 3874. Salpingeeca amphoridium, n. sp.: all magnified 
950 diameters. Fig. 37, an individual suspended freely in its 
calyx (c,c!). The dotted lines indicate the attitude which the 
collar (6) assumed for a while during the observation upon this 
specimen. A particle of feecal matter has just left the anus (a). 
ig. 372, the lower part of the calyx filled by the body, the 
* upper part (c!) free from the neck (¢) of the animal, and the 
membranous collar unusually narrowed. Fig. 37>, the calyx 
mostly filled by the body, the head (¢) bent to one side, and the 
flagellum (72) in the act of expelling a particle of undesirable 
matter. Fig. 37°, an empty calyx, slightly contracted in dimen- 
sions. Fig. 374, the body contracted and filling the calyx, and 
the membranous collar (6) partially retracted. 
Figs. 38, 39. Salpingeca gracilis, n. sp., 950 diam. Fig. 38, the body 
retracted within the calyx (c¢, c!). Fig. 39, the same as fig. 38, 
partially protruded from the calyx. 
Figs. 40-44. Leucosolenia (Grantia) botryoides, Bowrbk. Fig. 40, a 
colony of sponge, natural size. Fig. 41, view of a profile sec- 
tion of the monadigerous layer, the monads (md) closely packed 
together, side by side, with the membranous collar (b) and the 
flagellum (7) projecting into the general cavity of the colony, 
95 diam. Figs. 42, 43, 44, isolated monads with the mem- 
branous collar (6) in various attitudes, 950 diam. See also 
g. 64, 
Figs. 45, 46. Astasia trichophora, Clap. Fig. 45, a dorsal view, the mouth 
seen through the head, and the gubernaclum (fi*) in the back- 
ground, 500 diam. Fig. 46, the body in an amceboid, contorted 
state, 500 diam. 
Figs. 47-63. Anthophysa Miilleri, Bory. Fig. 47, a colony of adults at- 
tached to a single tubular branchlet or pedicel (pd); one of the 
monads is in the act of passing a pcre ities its mouth (m), 950 
diam, Fig. 48, a pair of adults seen in profile, 950 diam. Fig. 
49, a pair of young monads, one in profile and the other pre- 
senting its narrow side, 950 diam. Figs. 50 & 51, different at- 
titudes of the same monad as the one in profile in fig. 49, during 
the introception of food, 950 diam. Figs. 52-61, to illustrate 
the process of fissigemmation, 950 diam. Fig. 62, a piece of 
a tubular branchlet like fig. 47 (pd), 1900 diam. Fig. 63, a piece 
of a flat branch from an old part of the colony, 950 diam. 
Fig. 64. Leucosolenia botryoides, Bowerbk. A portion of the monadi- 
gerous layer (md) seen through the spiculiferous stratum, with 
the spicula next the eye, 500 diam. 
