REV. T. R. R. STEBBING—CRUSTACEA ISOPODA AND TANAIDACEA. 229 
of the molar. The three joints of the maxilliped palps bave been already 
mentioned. Their boundary-lines are rather faint. 
The ventral plates of the fifth pleon segment are of moderate size, s'ightly 
curved, with the free end truncate. 
The colour of the preserved specimen pallid, with black dots not thickly 
strewn. 
Length 4:5 mm., breadth scarcely 1°5 mm. 
Locality. Red Sea, 1904-5. Mise. 68. 
An imperfect specimen of one of the more ordinary forms of Oniscidea 
and some Talitridee occurred in the same glass tube with this 7ylos. 
EXPLANATION OF THE PLATES. 
PLATE 21. 
Lanocira latifrons, sp. 1. 
n.g. 6. Natural size of the male specimen represented in the adjacent figure. 
n.s.Q. Natural size of the female specimen, of which the head only is shown. 
C. 3, C.2. Dorsal view of head, respectively of the male and female. 
a.8., a4., a4, First and second antennse, with the abnormal apex of one of the lower pair 
further magnified. 
Ls., m., mv. 1, map. Upper lip, a mandible (probably not quite perfect), one of the first 
maxille in two opposite aspects, the maxillipeds. 
gn. 1, gn. 2, prp.5. First and second gnathopods, and fifth perzeopod. 
plp. 2. Second pleopod, with further enlargement of the masculine appendix. 
Pl. Dorsal view of the pleon, with the uropods. 
The mouth-organs, the gnathopods, the fifth pereeopods, and the two further 
enlargements are on a uniform scale, higher than that of the other details. 
PLATE 22 (A). 
Janura crosslandi, sp. 0. 
n.s. Line indicating natural size of the male specimen figured below, head, perzon, and 
pleon, separated; the upper lip protrudes in front of the head, of which the 
frontal line could not be clearly ascertained. The limbs of the slightly 
flattened perzeon are shown on the right side, and the distal part of the first 
enathopod and seventh joint of the second perzeopod are further magnified. 
oc. One of the eyes. 
a.s., a1. First antenna and proximal joints of second antenna. 
Ls., 12. Upper and lower lips. 
m., mx.1, ma.2, mvp. Mandible, first and second maxille, and maxillipeds. 
plp.1, 2, 3. First, second, and third pleopods of male. 
The eye, basal joints of second antenna, first maxilla, and third pleopod are 
separately drawn from the specimen figured under x.s.; the other mouth-organs and 
ple» pods and the first antenna from another, smaller, male specimen. 
