224 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
sp. Juv., and say that ‘The small specimen figured is no doubt immature, as 
may be judged from the unfurnished condition of the maxillipeds.” Under 
the new light thrown on the subject by Dr. Hansen, it is more probable that 
the specimen referred to was a female. 
Length, approximately the same for the four female specimens, 6°75 mm. ; 
one 6 mm. long, probably an immature male, with the mouth-organs quite 
normal for that sex, but without appendix on second pleopods. 
Locality. From two old broken shells, Suez docks, 7.12.04. 
Tribe Aserrora. 
Family J ZRID &. 
1897. Laniride, Sars, Crustacea of Norway, vol. ii. pt. 5, p. 98. 
1905. Janiride, Stebbing, in Herdman, Ceylon Pearl Fish., Suppl. Rep. 23, p. 48. 
1905. Parasellide, Hansen, Proc. Zool. Soc. London, 1904, vol. ii. p. 315. 
1905. Janiride, H. Richardson, Bull. U.S. Nat. Mus. No. 54, p. 448. 
In 1897 Sars divided his tribe Asellota into the five families, Asellidee, 
Taniridee, Munnidee, Desmosomide, and Munnopsidee. In 1905 Hansen 
accepted the Asellidee for the genera Asellus, Geoftroy, M/ancasellus, Harzer, 
and Cecidothea, Packard; he established a new family Stenetriidee for 
Stenetrium, Haswell, and grouped the other families together under the 
name Parasellidee. Without here offering any opinion one way or the other 
on this grouping, I may observe that as Jwra, Leach, is the oldest genus, it 
may claim to contribute its name to the formation of the family title. In 
Leach’s article ‘‘ Crustaceology,” in the ‘ Edinburgh Encyclopzedia,’ vol. vii. 
1813-14, at page 434, he gives Jwra as twelfth, and Janira as thirteenth 
genus in tribes which we now recognize as Isopods. 
As continental writers often appear to consider such forms as Jwra, Lwra, 
Janira, Ianira, Janthe, lanthe as respectively equivalents, it may be worth 
while to note that in each case for English readers the substitution of the 
second form, beginning with a vowel instead of a consonant, adds a syllable 
to the name, so that such a form as Janthe is substantially distinct from 
Janthe. 
Genus Janina, Leach. 
1818-14. Janira, Leach, Edinb. Eneycl. vol. vii. p. 434. 
1905. Janira, Stebbing, in Herdman, Ceylon Pearl Fish., Suppl. Rep. 23, p. 49. 
1905. Zanira, Hansen, Proc. Zool. Soc. London, 1904, vol. ii. pp. 302, ete. 
1905. Janira, H. Richardson, Bull. U.S. Nat. Mus. No. 54, pp. 449, 468. 
Under the above references the synonymy and characters of this genus 
will be found fully and instructively discussed. There is, however, one 
