GENERA: FOAINA AND RETORTAMONAS 



677 



system, is described in connection with the blepharoplasts and nucleus. 

 In addition to multiplication by binary fission, a process of multiple 

 fission is said to occur. As during division the nucleus behaves differently 

 from that of Trichomitus jyarvus, it is suggested that T. termitidis be 

 regarded as belonging to a sub-genus, Trichomitopsis. 



In connection with this genus, it has to be remembered that the 

 detection of an axostyle in Trichornonas is not always a simple matter. 

 In any preparation containing large numbers of Trichomonas, a number 

 of forms ahvays occur in which an axostyle is not 

 visible. Furthermore, in the large overgrown 

 forms of T. vaginalis, the axostyle is frequently 

 quite obscured, so that it seems possible that 

 the forms included in the genus Trichomitus may 

 in reality belong to the genus Trichomonas. 



Genus: Devescovina Foa, 1905. 

 This is a genus which was established by 

 Foa (1905) to include certain flagellates which 

 occur in the intestine of termites. The genus 

 is undoubtedly related to Eutrichomastix. 

 D. striata has been studied by Janicki (1911). 

 There are four flagella, three of which are 

 directed forwards, while one, which is much 

 longer than the others, acts as a trailing flagel- 

 lum (Fig. 32). There is a blepharoplast from 

 which the flagella arise, and behind it is the 

 nucleus, which appears to be embedded in the 

 axostyle. In relation to the nucleus and coiled 

 round the anterior part of the axostyle is an 

 elongate deeply staining body, the parabasal. 

 that Kofoid and Swezy (1915a) homologize the basal fibre of Trichojyionas. 



Fig. 280.— Poamrt gracilis 

 FROM Intestine of the 

 Termite, Calotermes cas- 

 taneus (x 1,825). (After 

 Janicki, 1915.) 



It is with this structure 



Genus: Foaina Janicki, 1915. 

 This genus was created by Janicki (1915) to include a flagellate of 

 termites, which resembles Devescovina in many respects (Fig. 280). In 

 place of the long coiled parabasal there are two small parabasals. 



Genus: Retortamonas Grassi, 1879. 



Grassi (1879a) created three new genera: Monoeereomonas, Betortamonas, and 



Schedoacercomonas. In the first genus he included intestinal flagellates of man, 



guinea-pig, snake, frog, mouse, and lizard. It is probable that all these were 



Trichomonas, and that Monoeereomonas is a synonym of Tricliomonas. The name 



