Annals of the Transvaal Museum. 
256 
each localized in a way such as to give the appearance of regular arrange^ 
ment ; these thickenings, however, do not extend over the whole of the 
carapace. 
Reference Literature. 
(1) Brady, G. Stewardson. “ On Entomostraca collected in Natal bv 
Mr. James Gibson (Part II).’ 5 Ann. Natal Gov. Museum, Yol. 1, pt. 2, pp. 
173-186, pis. xxix-xxxii, March, 1907. 
(2) Gurney, R. “ On a small collection of Entomostraca from South 
Africa.” Proc. Zool. Soc., 1904, Yol. II, pp. 298-301, pi. xviii. 
(3) Lilljeborg, W. “ Cladocera Sueciae.” Upsala, 1900. 
(4) Methuen, Paul A. “On a collection of Fresh- water Crustacea 
from the Transvaal.” Proc. Zool. Soc., 1910. 
(5) Sars, G. O. “ South African Entomostraca raised from dried mud 
sent from Knysna.” Yid-Selsk. Skrifter, M.-N., Kl., 1895, No. 8, pp. 
1-56, pis. i-viii. 
(6) Smith, W. G. “ Fresh-water Crustacea of Tasmania.” Trans. 
Linn. Soc., Ser. 2, Zool. 11, pt. 4, 1909. 
(7) Weltner, W. “ Die Cladoceren Ost-Afrikas, Deutsch Ost-AfrikaY 
4, 1898, Berlin. 
Explanation of Plates. 
The figures have been drawn with the aid of a camera lucida. 
First Plate. 
Fig. 1. — Lateral view of a male Moina belli Gurney. 
,, 2. — Lateral view of a female Bosmina longirostris var. nov. (?) 
africana australis. 
,, 3. — Lateral view of a young (?) male Bosmina longirostris var. 
nov. (?) africana australis. 
Second Plate. 
„ 4. — Part of the posterior margin of the carapace of a female 
Leydigia quadrangularis Sars. 
,, 5. — Teison of a female Bosmina longirostris var. nov. (?) africana 
australis. 
,, 6. — Posterior horns of carapace of Bosmina longirostris var. 
nov. (?) africana australis, indicating the extent of variation of 
this structure in the species. 
