On certain British Freshwater Entomostraca. 351 
to five each with a similar mark occupying the apical two- 
thirds of the segment; segments six to eight with a con- 
spicuous black ring as in N. unicingulata, this including all 
of segments six to eight excepting the basal half of the sixth 
sternite, which is orange; sternites unmarked. Hypo- 
pygium reddish orange; ninth tergite with a broad, rounded 
posterior notch; outer pleural appendage tapering to a long 
point. 
The female is generally similar to the male, but the 
occipital mark is less distinct, the przscutal stripes con- 
fluent, the scutellum and posterior margin of the postnotum 
darker brown, the pleural markings darker. ‘The tergal 
valves of the ovipositor are long and straight. 
Hab. Rhodesia (Melsetter District). 
Holotype, 6, Chirinda Forest, October 1905 (G. A. K. 
Marshall). 
Allotopotype, ¢ . 
Type in the collection of the British Museum. 
Nephrotoma mossambica is closely related to N. wuni- 
cingulata, Alexander (Transvaal to Cape Colony), in the 
cingulated abdomen and the apically pubescent wings. It 
is readily told by the much more extensive black areas on 
the mesonotum, the darker legs, the darker wings with the 
sector short and straight, and by the narrow black markings 
on abdominal tergites one to six. 
XLVIII.—WNotes on certain British Freshwater Entomostraca. 
By Rozert Gurney, M.A. 
Tue following notes refer to a few species taken during the 
past summer, mainly in Norfolk, some of which have net 
previously been found in Britain :— 
1. Chirocephalus diaphanus (Prevost) *. 
On Sept. 12, 1919, I found a number of specimens of 
the Fairy Shrimp in a small pool on Bratley Heath by the 
* Daday, in his “ Monograph of the Phyllopoda Anostraca” (Ann. Sci. 
Nat. xi. 1910, p. 206), adopts the specific name stagnalis, Shaw. Asa 
matter of fact, Shaw is antedated by King (1767), but in either case the 
name is inadmissible for this species under Article 31 of the Rules of 
Nomenclature (see Int. Rev. Hydrob., Suppl. vi. 1914, Heft 2). Had it 
not been so, there would be three species in closely-allied genera to all of 
which the same specific name might be attached. Fortunately, only one 
of them (Tanymastix stagnalis, Linn.) can properly claim that name. 
