114 
LARVA. Fig. 2e shows the drawing of a larva (of the natatory legs only the 
base is represented); it measures -15 mm. in length, and it is used as type in the description 
on p. 105 of the larva in this group of species. 
POST-LARVAL DEVELOPMENT. One pupa, °185 mm. in length (fig. 2f) is 
naked on about the front half of its body, while the posterior part is furnished with numerous 
very fine and short hairs. Another specimen, 172 mm. in length, is well provided with 
hairs all over, like the pup of S. daniea and S. chinensis. A third specimen (fig. 2a and 
fig.2.c) had lost the foremost third part of its skin, where a young female, 245 mm. long, 
was just emerging; the part of the skin of the pupa which encloses the trunk of the female 
has the usual hair-covering. 
HABITAT. The marsupiun of Corophium Bonellii M.-Edw. from Cuba. In one spe- 
cimen were found a very young female and one larva (or perhaps three larve)'); in another the 
female shown in fig. 2a, which has burst the skin of the pupa; in a third the pupa drawn 
in fig. 2f; in a fourth a recently hatched female; in a fifth the anterior part of a female, 
four ovisacs glued together and a pupa covered with hairs, hinged on a gill; finally, in a 
sixth specimen were found one large, but torn female and two ovisacs. The hosts were 
taken by Mr. Iversen (1871) and determined by the Rev. Th. R. R. Stebbing. 
REMARKS. It is most remarkable that both this and the former species, S. chinen- 
sis, occurred in hosts of the same species, from two localities as far removed from each other 
as Cuba (West-Indies) and Hong-Kong. These localities are no doubt correctly stated, as 
it is scarcely possible that there can be any mistake in the old labels on the two glasses 
which contained the hosts. And indeed, there is a great difference, not only in the hair- 
covering of the trunk, but also in the shape of the genital area in the females of the para- 
sites from the two localities, so that one is perfectly justified in establishing them as two 
separate species. — Whether the afore-mentioned difference in the hair-covering of the pup 
is of any importance, cannot be decided from this find. 
9. Spheronella Calliopii n. sp. 
(PL. Ill, fig. 3a—3 1.) 
FEMALE. A large specimen is 2°38 mm. in length and 2°05 mm. in breadth, and 
the head, which is rather small, is well defined from the sub-globular trunk. In somewhat 
smaller specimens the trunk is more oblong. The median part of the frontal margin is 
provided with short hairs (fig. 3d).  Antennule of medium length, 3-jointed, with rather 
short terminal setee. Antenne small, but distinct, the number of joints — probably two — 
1) With regard to two of these larvie notes are wanting; they were possibly found together with the 
third one. 
