308 
ZOOLOGICAL LITERATURE. 
It is divided into many somites, but wbicli are not suiBciently distinct to be 
counted. Tlie pleon, wbicli is rounded at the extremity, terminates in two large 
flat lozenge-shaped appendages, above which, upon each side, are percep- 
tible the ovigerous tubes. The cephaloii is small, the frontal margin den- 
ticulated, the summit ornamented with a trefoil relief and furnished at the 
base with an ocular point j on each side of the head and under the frontal mar- 
gin are the antenna), of which the base is large, striated, flat, and fringed 
with hairs to the tip; they terminate in a three-artieulated flag(ilum. lienealh 
and near the frontal margin is the mouth, which is very prominent, conical, 
terminating in a trumpet-shaped orifice, from which springs a sucker and 
some small lateral appendages. The pereiopoda are four pairs, short, flat, 
robust, three-jointed, and terminate in a hook. In conformation the mouth 
and ovigerous tube resemble those of the Siplionostoma. It was found 
inhabiting Polydinium constellatum. 
A second new genus he describes under the name of BotryllophiluSy of 
which B. ruler IS taken as the type. It is only 1 mm. long and | mm. broad. The 
sexual diflerence is considerable. The male has the body cylindrical, with 
a slight tapering at each extremity. The pleon is separated from the pereioii 
by a strong divisi{)n. The cephalon is triangular, having an eye in the 
central front. The antennae are short and jointed, flat and large at the base, 
and furnished with short teeth or spines. The pereion consists of four 
somites of equal size. The pleon consists of five or six somites, and termi- 
nates at the caudal extremity in two short pediform appendages armed with 
three robust hooks. The female has the cephalon very trianguloi*, and very 
distinct from the pereion, which has a long spinous process on each side of the 
posterior somite, which appears to protect the ova which are agglomerated 
together in a sphere beneath it. The pleon is much narrower and consists 
of six cylindrical somites. It was found inhabiting Botryllus stellatus. 
A second species, named Botrylhpliilus virescens, M. Hesse describes as 
diftering from the preceding in having six somites to the pereion, and also 
in colour, with other details. 
To a third genus M. Hesse has given the name of Ichnoyrade, and de- 
scribes it from a single species, Ichnoyrade ruber It is but 1 mm. in length, 
and was found inhabiting Ascidia jnicrocosma. 
A fourth new genus M. Hesse has added to the group under the name of 
Podolabis, of which he has taken Podolubis f aims, sp. n., as the type. This 
little crustacean is about 4 mm. long and 2 broad. The cephalon is small, 
and the median eye is protected by a small spine. The pereion is marked 
by a constriction between each somite, and the pleon consists of only three 
or four indistinctly defined somites. The pereiopoda consist of a biarticulate 
appendfjge terminating in a small but poAverful prehensile chela. The ova 
appear to be of moderate size, and occupy all the cavity of the body behind 
the cephalon. This species was taken in a Botryllus attached to Pecten 
maximus. 
A second species M. Hesse has named Podolabis albidus, from a female 
specimen found living in a Polyclinium attached to the feet of Muia sipuinado. 
The male is unknovvn. 
A filth genus has been described by this zealous naturalist under the 
* By some inadvertency the figures in the plate are named Iflantipodo.” 
