220 - MARINE BIOLOGY OF THE SUDANESE RED SEA. 
naturalists were as indifferent to rights of priority as some in our own day 
are inclined to be. It must be owned that Linnzeus had set the example. 
Bate and Westwood say of this species, “ young individuals, measuring 
not more than two lines in length, have the outer edges of the side appendages 
of the tail (uropoda) entire, and not serrated.” Specimens from Suez, 
measuring when unrolled only 2°5 and 3 mm. in length, had the outer edge 
of the outer branch of the uropods serrate as in their larger companions, the 
largest of which measured 7 mm. by 3°75 mm. 
Locality. Suez docks, from two old broken shells, 7.12.04. 
SPHAROMA WALKERI, Stebbing. 
1905. Spheroma walker?, Stebbing, in Herdman, Ceylon Pearl Fish., Suppl. Rep. 23, 
froth, wok Ze 
Numerous specimens, mostly rather small, of this well-marked species were 
obtained at Suez by Mr. Crossland on board the s.s. ‘Thyra.’ 
Genus HxospHsroma, Stebbing. 
1900. Evospheroma, Stebbing, Proc. Zool. Soc. London, p. 553. 
1902. Exospheroma, Stebbing, South Atrican Crustacea, pt. 2, p. 64. 
1905. Evospheroma, Hansen, Quarterly J. Microsc. Sci. vol. xlix. pt. 1, pp. 75, 82, 105, 
116, 118. 
While transferring Sphwroma leucura, White, and /S. stémpsonii, Heller, to 
Eevospheroma, Hansen remarks further :—‘ Several of the nearly twenty 
species enumerated above as referred to Spheroma by earlier authors, but 
whose systematic position I am unable to settle, will certainly prove them- 
selves to belong to LMwvosphwroma. On the other band, of the three species. 
established by Stebbing as species of Hvosphwroma, [. validum (Stebb.) is. 
the immature male and L. setulosum (Stebb.) the female of the same species 
of Cymodoce, while FE. amplifrons (Stebb.) is the adult male of an aberrant 
species of Cymodoce.” 
EXOsPHAZROMA RETICULATUM, sp.n. (Plate 22, B.) 
In comparing this species with the characters given by Hansen for the 
group which he designates Sphewrominsze hemibranchiate, and within that 
group with the characters distinguishing Leosphwroma, there is only one: 
point of obvious disagreement. Hansen states that the exopod of the third 
pleopods is two-jointed. But that is not the case with the present species. 
All over the back the integument shows a fine net-like structure or pattern, 
with some scattered setules. The head has a small rostral point. The telsonic 
