yO Dr Gairdner's Analysis of 



Lepadella emarginata, n. sp. ... ^^y" 



E. Monas termo, Miiller. ... . . ^^^^ 



E. ? Monocerca Rattus ? (Trichoda, Muller) . . j', 



E. Navicula fusiformis, n. sp. ... ^'j 



, intemipta, n. sp. . . . . ^^ — g»j 



Paramsecium ? sinaiticurn, n. sp. . . . ^^ 



Rotifer erythraeus, n. sp. . . . . ^^ 



Trichoda asiatica, n. sp. . . . . 7"^ 



E. ? pyrum ? (Kolp. pyrum, Muller) . ^^5 



VIII. Suckot, in Nubioy in stagnant Nile ivater, — 2 Forms. 

 ' Distigma Planaria, n. g. . . . . 5V" 



E. Rotifer vulgaris, Schrank ? . . . _i^ 



IX. Island of Argo, on the Nile, in Dongola. — 3 Forms. 

 Cyclidium lendiforme, n. sp. . . . 5I5"' 



E. Paramaecium Chrysalis, Muller, . . * io 



Trichoda sethiopica, n. sp. ... -^^ 



X. Kasr Dongola, Fortress in Dar Dongola. — 10 Forms. 



E. Anguillula inflexa, n. sp. 



dongolana, n. sp. 



Cyclidium planum, n. sp. 

 E. ? Cycloglena elegans ? n. g. . 

 E. ? Diglena catellina ? (Cere. catelL Miiller) 

 E. ? I. aurita, n. sp. 



E. ? Ichthydium Podura (Cere. Pod., Muller) 



Monas glaucoma, n. sp. 

 E. Paramsecium chrysalis, Miiller, , 



Pandorina hyalina, n. sp. 



15 



IS 



1 



54 



XL Island ofMasoua, in the Red Sea, — 1 Form. 

 Zoocladium niveum, n. g. . . . 5'" — 3'" 



In all 64 forms, which are reducible into 57 distinct syste- 

 matic species, observed in tropical regions, with the single ex- 

 ception of one at Cattaro, of which it will be seen, from an in- 

 spection of the table, that 14 are species which have been ob- 

 served in Europe (Leipzig and Berlin) *, and 8 so closely allied 

 to some forms exhibited there -f-, that Dr Ehrenberg has not 

 ventured to characterize them by a distinct name ; leaving 35, 

 or about two-thirds of the whole, peculiar to tropical countries, 

 and which they possess in addition to many European species. 



• These are preceded in the Table by the letter E. 

 f These are preceded by an E ? 



