Miscellaneous. 169 
plate at the summit, which, however, contains an orifice of con- 
siderable size, concealed by overlying spines. ‘This orifice does not 
lead into the cavity occupying the whole inner space of the test, 
but into a peculiar sac spread out beneath the dorsal arch, which 
does not seem to communicate with the general cavity, and in which 
the above-mentioned little sea-urchins lie; so that they can make 
their escape through the opening, which corresponds with them in 
diameter. The walls of this sac are formed by a membrane filled 
with a microscopic calcareous latticework; this is applied to the 
margins of the orifice, which are broadly turned inwards, and is thus 
suspended. Upon the inner surface of the sac small Pedicellarie 
are seated, and upon the inner surface of the above-mentioned in- 
curved margins small spines; upon the surface of the test, besides 
the spines, Pedicellarie of larger dimensions occur ; and the spines 
(which, however, do not appear to the eye to form rows) are of two 
kinds—namely, longer ones, which are not very sharp, and shorter 
ones spreading at the end into small teeth. 
The internal space of the test. situated beneath the sac destined 
for the reception of the young, is chiefly occupied by the intestinal 
canal, which is attached to the wall, and commences with a very 
narrow cesophagus: on the anterior part of the wide portion, in 
which this is immersed, and which perhaps may be indicated as a 
stomach, a spot beset with minute paired ceca may be observed. A 
very fine and rather rigid canal, descending from the bottom of the 
brood-sac and probably continued to the region of the peristome, 
may perhaps be the sand-canal, and the spot from which it origi- 
nates the madrepore-plate. But no trace of genitalia is to be seen, 
which is in accordance with the want of genital apertures. The 
germs of the young must be produced on the lower surface of the 
brood-sac ; for here are suspended oval corpuscles about ? millim. 
in length, closely embraced by a saccule, which greatly resemble the 
youngest spineless embryos in the brood-cavity, whilst the most de- 
veloped of the latter, as already stated, possess a test with feet and 
spines, and even with Pedicellarie. Nevertheless these young ani- 
mals do not present any complete agreement with the parent animal; 
their test is circular in its horizontal circumference, the peristome 
central, the larger spines distinctly stand in two longitudinal rows 
upon the interambulacra, and, above all, they want the apical orifice 
and the pit for the anus, although a spot free from spines may be 
observed upon the back of the test a little behind the middle. 
According to this representation (which, indeed, is founded only 
upon the investigation of a single specimen) these germs, which are 
seated upon the calciferous walls of a sac opening outwards with a 
wide orifice, would have to be regarded as buds, and Anochanus as it 
young or larval state, like a Pluteus; but the young which it pro- 
duces must await a sexual development. 
However, it is permissible, and will facilitate future comparisons; 
to give the animal on which these investigations have been made a 
distinct name; and as, according to the statement of Salmin, the 
natural-history dealer, it was found in the Chinese Sea, it may be: 
Ann. & Mag. N. Hist. Ser. 4. Vol. ii, 12 
