496 REPORT ON ZOOLOGY, MDCCCXLIV. 



stomach of the Dog only two species, in that of the Hog 

 but one species of monads are found, which would appear 

 to stand in close connexion with the digestion of various 

 vegetable and animal articles of food. 



Klencke (Neue physiologische Abhandlungen, 1843, p. 

 165, Fig. 25) has observed in the blood of persons who had 

 been subject to frequent attacks of vertigo, minute serpent- 

 and fish-like animalcules of various sizes, which moved with 

 great activity, swimming sometimes with a serpentine motion, 

 and sometimes, when larger, crawling along like caterpillars. 

 From this description no idea of these worms can be formed ; 

 the smallest individuals were about the third part of a 

 blood-disc in length, and the largest were about three times 

 as long as the diameter of a blood-disc. They were quickly 

 killed by a drop of water. Immediately before the attacks 

 of vertigo they were more lively, and shortly after them 

 more sluggish. If the vertigo did not occur for from eight 

 days to a fortnight, Klencke could not discover any trace 

 whatever of the infusoria- like Entozoa. If the attack of 

 vertigo was very severe, the larger animalcules predomi- 

 nated. As for the rest, it appears that Klencke first dis- 

 covered these hasmatozoa in his own blood at a time when 

 he had suffered for several months from sudden attacks of 

 vertigo. If the figure which Klencke gives of these crea- 

 tures be compared with the vibriones (vid. Vogel, Icones 

 Histologise pathologic^, Tab. xi, Fig. 10) which are developed 

 in all putrefying animal fluids, as blood, pus, &c., in vast 

 quantities, and which are scarcely ever wanting in foul ulcers, 

 it will be quite evident that Klencke's hrematozoa were also 

 vibriones of the same kind. The same observation, pro- 

 bably, will apply to the worms found by Brunetta (vid. the 

 Reports of the Scientific Congress at Lucca. Medical section, 

 allgem. Augsburger Zeitung vom 14 Oct., 1813; Supple- 

 ment, p. 2247) in the buboes of a syphilitic patient. 



An already well-known hrematozoon has latterly been the 

 subject of investigation by several naturalists. Its simple 

 organization allows it to be compared with a cell, the whole 



