Figure 
3m. 
ha. 
Ab. 
hc. 
204 
Larva which was attached to the female shown in fig. 3b, its skin is burst along the lateral 
margins, and it contains a fully developed male, >< 184; a. antennula of the larva, b. olfactory 
seta of the antennula, s. viscous substance proceeding from the front of the male. 
Right maxilla and maxilliped with a part of the sub-median skeleton of the larva shown in 
fig. 3a as attached to the carapace of Hr. abyssorum and marked /.; the organs are scen 
from below, > 330; h. sub-median skeleton. 
PLATE XII 
(Supplements to pl. Il, HI and X.) 
1. Homoeoscelis mediterranea n. sp. 
Female, 110. 
Male, X 110. 
Ovisac, X 110. 
Head of female, >< 312. The short hairs on the lateral margins omitted. 
Genital area and its surroundings of female, >< 322; the receptacula seminis are indicated by 
dotted lines; on the orifice of one are attached a spermatophore and the basal part of the 
stalk of another spermatophore, on the orifice of the other are seen parts of the stalks of 
two spermatophores. 
Male seen from below, 230. 
Male seen from left side, >< 230. 
Full-grown larva seen from left side, 297. Most of the natatory legs omitted. 
2. Spheronella danica n.sp. (Supplement to fig. 4 on pl. IL) 
Genital area and its surroundings of a scarcely half-grown female, < 216. 
8. Spheronella Leptocheiri n. sp. 
Female, 36. 
Male, 36. 
Head of female, 165. 
Genital area and its surroundings of female, 216; e. solidly chitinised ring, g. genital aper- 
tures, m. muscles, 7. receptacula seminis, ¢. caudal stylets. 
Outline of a part of a male seen from below, showing the processes of the sub-median 
skeleton, one maxilliped, the legs on the right side and the caudal stylets, >< 276. 
4. Spheronella messinensis n. sp. 
Female with two spermatophores, > 62. 
Head of female, 214. 
Genital area of female, X 274. The receptacula seminis are indicated by dotted lines, and a 
spermatophore is attached to the orifice of one. 
5. Spheronella irregularis n. sp. 
Female with three spermatophores, > 41. 
Ovisac, X 41. 
