88 Dr Gairdner's Analysis of 



cessarily subordinate to the collection and description of the 

 larger animals. These circumstances, together with the caution 

 necessary in the use of instruments of brass in the presence of 

 half civilized people, fatigue, disease, &c. have much circum- 

 scribed the extent of his researches, which cannot thereibre be 

 regarded as fixed principles, but as serving as the foundation of 

 a more extended series by the labours of future travellers. 



1. In Terrestrial Waters. — On his first journey into Africa 

 and Arabia, he made observations in ten different iocahties, be- 

 sides one on the coast of the Adriatic, of which the following is 

 a synoptic table : 



I. Adriatic Sea, at Cattaro. — 1 Form. 

 E. Monura Colurus, n. sp. . . . . 5*}"' 



II. Mediterranean Sea at Alexandria. — 3 Forms. 



Bacillaria Cleopatrae, n. sp. 



Ptolemsei, n. sp. 



Zoobotryon pellucidus, n. g. 



45 



35<J 



1—1 



III. Oasis of Jupiter Ammon near Sitva. — 8 Forms 

 •f- E. Anguillula fluviatilis, 



Bacterium triloculare, n, sp, 

 Cyclidium inane, n. sp. 

 E. ? Enchelys Pupa ? Muller, 

 Hydrias cornigera, n. g. 

 Monas glaucoma, n. sp. 

 E. termo, Muller, 



Trichoda Nasarmonum, n. sp. 



IV. Boulah near Cairot in stagnant Nile tvater. 



Bacterium simplex, n. sp. . 

 E. Monas atomus, Muller, 

 E. Paramaecium chrysalis, MuJler, 



Trichoda ovata, n. sp. 



Typhlina viridis, n. g. 

 E. Vorticella convallaria, Miiller, 



3 



355 



1 



5^. 



—6 Forms. 



ISO 



Iff 



4?5 



• This singular genus is remarkable for its size. It resembles very much a Fucus, and often 

 attidns a foot in diameter. This mass is not, however, formed of a single animal, but consists of 

 many thousand microscopic animalcules united together by a gelatinous filamentous network. 

 The animal, which adheres in clusters to the extremities of the connecting filaments, is allied to 

 the group of the Vorticellaj. 



t This genus, which has been formerly noticed as probably belonging to the class of Entozoa, 

 is included in these geographic indications, as it has hitherto been reckoned among, and is gene- 

 rally known only as an infusory animal. 



