164 
maxillee are normal, with a large, thick basal joint; the maxillipeds are 4jointed; the genital 
area is plate-sshaped. The male is known only in one of the two first mentioned species, 
but it differs widely from all the other males known of the family. Of the species (S. Man- 
nopsidis), the female of which deviates most from the species found in Amphipoda, I have 
found scarcely quite developed larve, which in the structure of antenne and maxille come 
close to the species of the genus which live in Cumacea, but they differ from these parasites 
in having the second joint of the maxillipeds much longer than the third, whereas the 
fourth joint is armed with three spiniform processes on the distal part of the inner margin 
The larva of the two other species, unfortunately, is unknown. So the knowledge of this 
little group is rather defective. 
Conspectus of the Females. 
1. The head distinctly defined from the trunk, frontal and lateral borders well developed. 
Genital apertures: obliqnezandmclosestosethermsemensn eno) c rele ene einen ene 2 
1’. The head not defined from the trunk, no frontal or lateral borders. Genital apertures 
transverse, comparatively far from each other ....... . 34. S. Munnopsidis n. sp. 
2. The genital area is a very large plate, only a little broader than long, and the longest 
dimension of the muscles of the genital apertures is shorter than the distance from 
their outermost extremity to the margin of the plate... .... 32. S. curtipes n. sp. 
2’. The genital area is a large plate, considerably broader than long, and the muscles of 
the genital apertures are a good deal longer than the distance of their outermost 
extremity from the margin of the plate............ .... od. S: Gffinis Desp: 
32. Spheronella curtipes n. sp. 
(Pl. X, fig. 2a —2g). 
FEMALE. ‘The only specimen found (fig. 2a) is 24 mm. long, 2°2 mm. broad and 
considerably flattened; anteriorly the body tapers a little. The head is well defined, but 
very small, and especially very short, nearly twice as broad as long (fig. 2d). The slightly 
curved frontal margin is furnished in its whole length with excessively short hairs. An- 
tennulee of about medium length, 3-jomted, the terminal setae somewhat shorter than the 
antennula. Antenne not found. Mouth very large, with extremely broad mouth-border. 
The maxillulee have tolerably long and powerful principal branches and a good-sized additional 
branch. Mavxille very large, the basal joint long and very thick, smooth. Basal joint of 
the maxillipeds long and slender, bearing a few short hairs at the distal end, otherwise 
naked; the three other joints slender, and the last joint provided with a single spine a 
little inside its pointed end, The sub-median skeleton has a broad list inside the maxille, 
