222 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
Genus Cymopocr, Leach. 
1813-14. Cymodoce, Leach, Edinb. Encyel. vol. vii. p. 433. 
1818. Cymodocea, Leach, Dict. Sci. Naturelles, vol. xii. pp. 341, 342. 
1840. Cymodocea, Milne-Edwards, Hist. Nat. Crust. vol. iii. p, 212. 
1902. Cymodoce, Stebbing, South African Crust. pt. 2, p. 78. 
1905. Cymodoce, Stebbing, in Herdman, Ceylon Pearl Fish., Suppl. Rep. 23, p. 42. 
1905. Cymodoce, Hansen, Quarterly J. Microsc. Sci. vol. xlix. pt. 1, pp. 70, ete. 
1906. Cymodoce, H. Richardson, Proc. U.S. Nat. Mus. vol. xxxi. p. 5. 
As will be seen from Hansen’s above-mentioned essay, several species, 
properly belonging to this genus, have previously been described under other 
generic names. 
CymMopoc# PILOSA (Milne- Edwards). 
1840. Cymodocea pilosa, Milne-Edwards, Hist. Nat. Crust. vol. iil. p. 2138. 
1905. Cymodoce pilosa, Hansen, Quarterly J. Microsc. Sci. vol. xlix. pt. 1, pp. 85, 134, 
pl. 7. figs. 1 a—-2e. 
In the Ceylon report I have given a translation of the description of this 
species by Milne-Edwards, for comparison with my own accounts of the 
nearly allied Cymodoce bicarinata. The specimens from Suez which I now 
venture to name C. pilosa agree well with the original description, except 
that (like the male of C. bicarinata) they are only half the size, which may 
possibly be accounted for in some by their being females, but in addition 
they do not show the setose boss at the extremity of the median longitudinal 
furrow of the telsonic segment, and further the outer ramus of the uropods is 
not much, if at all, broader than the inner. Milne-Edwards says that these 
rami extend much beyond the extremity of the pleon. In the present 
specimens, when the pleon is folded, these rami appear to extend beyond it, 
but that is no longer or not always the case when it is flattened out. 
The specimen first dissected proved to be a female laden with large eggs 
which extended from the head to the pleon. The antenne are of the usual 
pattern. In the first pair the first joint is broad and long with a rounded 
boss at the base and a flattened lamina extending along and much beyond the 
boss, the two together probably representing the first and second joints in 
coalescence. The following joint is short and less broad, but still laminar, 
carrying a slender fifteen-jointed flagellum, in which the first Joint is so 
much longer than any of the rest that it might well pass as peduncular. In 
the second antennz the first three joints are rather short, not massive, the 
fifth joint rather longer than the fourth, which is not greatly longer than 
the second; the flagellum eleven-jointed. This flagellum in another 
specimen, with fewer eggs, was fifteen-jointed like that of the first pair. 
In the mouth-organs both specimens agree closely with the account and 
figures given by Hansen, who for the first time has pointed out that in 
