114 



LARVA. Fig. 2 e shows the chawing of a larva (of the natatory legs onty 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. 2 f) 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 pupae of S. danica and S. chinensis. A third specimen (fig. 2 a 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 marsupium of Corophium BonelUi M.-Edw. from Cuba. In one spe- 

 cimen were found a very young female and one larva (or perhaps three larvae) 1 ); in another the 

 female shown in fig. 2 a, which has burst the skin of the pupa ; in a third the pupa drawn 

 in fig. 2 f ; 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, 8. 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 pupae 

 is of any importance, cannot be decided from this find. 



9. Sphaeronella Calliopii n. sp. 



(PI. Ill, fig. 3 a-3 1.) 



FEMALE. A large specimen is 2 - 38 mm. in length and 205 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. 3 d). Antennulae of medium length, 3-jointed, with rather 

 short terminal setae. Antennae small, but distinct, the number of joints — probably two — 



') With regard to two of these larvae notes are wanting; they were possibly found together with the 

 third, one. 



