234 Miscellaneous. 
stratum. In this species the families are composed of but very few 
cells, surrounded by a very large, more or less globular or elliptical 
mass of transparent firm jelly. The species is very closely allied to 
Chroococcus turgidus, var. thermalis, Rabenh., from which it differs 
in the outer jelly not being lamellated. 
The following is the technical description of the species :— 
C. thermophilus, sp. nov. 
Ch. cellulis singulis aut geminis vel quadrigeminis et in familias 
consociatis, oblongis vel subglobosis, interdum angulosis, haud 
stratum mucosum formantibus; tegumento crassissimo, achroo, 
haud lamelloso, homogeneo; cytioplasmate viridi, interdum sub- 
tiliter granulato, interdum homogeneo. 
Diam. Cellule singule sine tegumento longitudo maxima ,2,,” 
150C ? 
latitudo maxima 53,5 ".—Sulliman’s Journal, July 1868. 
Description of two Sacculinide. By M. Huss. 
The author remarks upon the importance of the habitat of para- 
sitic Crustacea in ascertaining their identity, and states that, with 
but few exceptions, these animals are strictly confined to particular 
species of Crustacea or fishes. He describes two new species of 
Sacculinde parasitic upon crabs. 
Sacculindia Gibbsit. 
Larger than the examples found on Carcinus menas, being 25 
millims. in length, 20 in breadth, and 10 in thickness. Its form is 
rounded quadrate, slightly flattened laterally; the pedicle, which is 
short, presents on each side two rounded protuberances, reverted 
towards the upper part of the body. The position of the anal orifice 
varies in consequence of the contractions of the body ; it is generally 
placed directly opposite to the pedicle. Its construction is exactly 
as in the parasite of Carcinus menas. 
The skin is thin, showing through it the meanders of the oviferous 
tubes. It has a velvet-like appearance, and is very tense. The ova 
are large, oval, and contain only a single vitellus. The eye appears 
as ared spot; at the middle of the body laterally are two round 
black spots, which always occupy the same place. The colour of the 
body is very deep yellow, with a reddish-brown tinge. 
The specimen was found, in January 1867, on the abdomen of an 
example of Pisa Gibbsii, where it was not protected by the carapace. 
M. Hesse remarks that it is singular that the Pisa had not freed it- 
self from its parasite, which it could easily reach. 
Sacculinidia Herbstia nodosa (!). 
Measurements, 25X15x5 millims. Resembles the parasite of 
CO. menas in form, but presents laterally two horizontal expansions, 
one forming a cylindrical process, the extremity of which is curved 
downwards like a hook. Anal aperture placed at the middle of the 
