1903.] NATURAL SCIENCES OF PHILADELPHIA. 53 



Amphoroides fontarise sp. n. PI. I, figs. 12-14. 



Epimerite: Not seen. 



Protomerite: More or less pentagonal in outline. Separated from 

 deiitoraerite by an evident constriction. 



Deutomerite: Variable, normally a long oval. Sometimes shows a 

 distinct shoulder in front. Always terminates bluntly. 



Epicyte: Very distinct over the entire animal. Greatly thickened at 

 the anterior part of the protomerite, this feature being as well marked 

 in the smallest as in the largest animals. Longitudinal striations not 

 evident. 



Sarcocyte: Always present, but much more evident in some animals 

 than in others. 



Entocyte: Very opaque in the deutomerite, and nearly transparent in 

 the protomerite, the contrast between the two parts being very sharp 

 in this gregarine. 



Nucleus: Moderate in size, spherical, with one usually spherical 

 karyosome. Not always evident in the living animals. 



Dimensions: Maximum length 135 microns. 



Movements: This gregarine is very active, displaying constantly both 

 muscular contractions and a gliding progression. The muscular activ- 

 ity manifests itself in lateral displacements of the protomerite, in bend- 

 ings of the deutomerite and in a peristalsis which involves the anterior 

 part of the deutomerite. Profession is easy and rapid and always 

 accompanied by evidences of muscular contraction. 



Hosts: Polydesmus and Fontaria, Diplopods of the famih' Polydes- 

 midse. The gregarines were usually present in hundreds in the para- 

 sitized animal, but often only a very few could be found. 



Localities: Wyncote, Pa., and Raleigh, N. C. 



Asterophora philica Leidy. PI. Ill, figs. 31-33. 

 Gregarina philica Leidy (1889), p. 9, 1 fig. 



It is impossible to give a description of this species. Figs. 31 and 32 

 are very plainly of the same gregarine, whereas fig. 33 seems almost cer- 

 tainly to belong to a different species. Further, the form figured by 

 Leidy in 1889 is not so closely like that shown by figs. 31 and 32 as to 

 render it certain that the two are the same. 



I therefore include the three different forms under the same name, 

 giving only the figures and reference, until such time as sufficient mate- 

 rial is obtained to determine accurately what the actual facts may be. 



The gregarines figured were about 300 microns long. 



