ME. P. H. GOSSE ON THE DKECIOUS CHAEACTEE OF THE EOTIFEEA. 317 
other five, not difiering fi-om them. The small egg, when deposited (and for some time 
before), is pellucid and colourless, except that many yellow oil-globules are contained in 
it, which are aggregated into two (or three) masses. The pellucid interior has a deli- 
cately granular appearance, which after a while begins more distinctly to form cells, and 
becomes more turbid. 
3^ 30“. A male was hatched from the most advanced of the small eggs. It is almost 
indistinguishable from that of amipliiceros ; but the toes are rather more developed (fig. 2). 
The opake masses in the posterior region are aggregated together, and very con- 
spicuous. This aggregate mass seems to be contained in a central irregular bladder, 
which is connected with the protrusile organ. I distinctly saw, many times in succession, 
the penis behind the foot everted and protruded beyond the toes, when the tip was seen 
to be ciliated: a sort of thick (two-lobed 1) piston (probably the thickened retractor 
muscles) was thrust rapidly down when it was protruded. It is frequently retracted 
with the foot into the abdomen. 
18. I put it, almost as soon as bom, into a live-box, with a half-grown female, and 
managed to enclose them together, by means of cotton fibres, in a cell sufficiently small 
to be contained in the field. I watched them long : the male was very wild, trying to 
escape ; several times, in darting round, he stopped near the hinder part of the female, 
and momentarily protruded the penis, and turned it towards her, and once, as I thought, 
actually introduced it into the cloaca, but only for an instant. The female appeared 
conscious of excitement while the male was near, whisking about the foot and feeling 
him with it. 
19. The next day I collected about a dozen females, half-grown and adult (which I 
could easily take up with a tube from the numbers in the water), and placed with them 
two lively males that had been hatched during the night. I directed my attention prin- 
cipally to one of these, as I could not watch them both. It soon came near some of the 
females, when it seemed to become animated by a sort of frenzy ; describing, with ex- 
cessive rapidity, a cii’cle, of which its head formed the cu'cumference, and its foot the 
centre : the extremities were incurved in the direction of its circular movement. After 
a while it left olf and began to play about the body of a female, moving over and round 
the lorica, while she whisked about the foot, as if to lay hold of him ; at length she 
drew in her foot, and that of the male appeared to adhere to it, and I distinctly saw the 
thick penis presented to the cloaca, and for a moment inserted about half its own length; 
then it was instantly drawn out, and the male began his frenzied gyrations again. Two 
or three times I saw similar play between him and females, but could not see any actual 
intromission again. Sometimes he moved his body in quick waves, the foot being the 
fixed point. 
20. Next I examined the little new species that I have named angularis^ which 
was swarming in a bottle of water dipped from a pond near Tottenham. Many carried 
two eggs each, measuring of iiich in length, others several, which measured 
only sToth. One of the latter produced a little male (figs. 13, 14), which appeared 
