ZOOLOGY AND BOTANY, MICEOSCOPY, ETC. 365 



divides longitudinally with the formation of an extra-nuclear parades- 

 mose between them as the two parts separate. Division of the 

 clu'omosomes (about 48) is longitudinal. The nuclear membrane remains 



V , 



'•■■•^ 4V'*/ /, 





Anaphase of Leidyopsis. Note the flagella and other ectoplasmic 

 structures attached to centroblepharoplasts. + 300. 



intact throughout mitosis, with the spindle fibres arising from the ends 

 of the paradesmose and centroblepharoplast and passing through it. 



J. A. T. 



New Species of Trichomitus. — Charles Atwood Kofoid and 

 Olive Swezy {Univ. of California PuUications in Zoology, 1919, 20, 

 21-40, 2 pis. 2 figs.). A description of T. termitidis sp. n.i from the 

 intestinal tract of Termopsis, where it is apparently not pathological. It 

 feeds on the intestinal debris. There is a highly developed neuromotor 

 system with parabasal body, undulating membrane, centroblepharoplast, 

 and flagella attached by a rhizoplast to the nucleus. Binary fission 

 occurs frequently. Mitosis is marked by the development of a large 

 paradesmose following the separation of the centrosome from the 

 blepharoplast. One schizont retains the old parabasal body and 

 membrane, while new ones are formed for the other. Multiple fission 

 results in the formation of an eiglit-zooid somatella, followed by plas- 

 motomy. The new species differs so much from T. parvus in the process 

 of mitosis that a new subgenus, Trichometopsis, is proposed for it. 



J. A. T. 



Flagellate of Lizard found also in Tick. — Ed. Reichenow {Bol. 

 Inst. Nacional Higiene, 3Iadrid, 1918, 14, 183-204, 1 pi.). A Flagellate, 

 Eiitrichomastix lacertse ( = Trichomastix lacertae Chatton), which occurs 

 in the gecko and in other Lacertilia {Lacerta muralis, L. viridis, 

 L. ocellata, Psammodromus hispanicus, and Acanthodactylus vulgaris), 

 is also found to occur in a blood-sucking tick. In Lacertilia the parasite 

 has been found both in the intestine and in the blood ; in the tick 

 Liponyssus saurarum it occurs in the cells of the intestinal epithelium. 



J. A. T. 



