253] STUDIES ON GREG ARINES —WATSON 43 



knowledge, the older name is placed in parenthesis after the now ac- 

 cepted name. 



The spelling of the name of the diplopod Julus as given by Linnaeus 

 (1766) has been used thruout wherever the word appears, whether in 

 the name of the host or in the name of a species of parasite where the 

 name is used as a prefix. The lulus of some authors is, then, disregarded 

 in the nomenclature of the species. 



A Brief Synopsis of the Families and Genera of the Tribe Cephalina (Delage) 

 OF the Suborder Eugregarinae (Leger) 



This synopsis is based on the classification of Minchin (1903, 1912) and Poche 

 (1913). 

 Subphylum Sporozoa Leuckart 1879:241. 



Class I. Telosporidia Schaudinn. Sporulation ends the life of the individual. 

 Order i. Gregarinida Biitschli 1882 .-503. Reproduction by spore forma- 

 tion only or by both spore formation and budding. 

 Suborder i. Schizogregarinae Leger. 



2. Eugregarinae Leger. Reproduction limited to spore for- 

 mation. Spores octozoic. 

 Tribe i. Acephalinae KoUiker (Monocystoidae Poche). 



2. Cephalinae Delage 1896:269. Eugregarinae with an 

 epimerite at some stage in the life history. Body 

 usually divided by septum into protomerite and deu- 

 tomerite. Spores virith two coats. Mainly parasitic 

 in the gut of arthropods. 

 Family i. Didymophyidae Leger 1892:105. In associations of 

 two or three. No septa in satellites. 

 Genus i. Didymophyes Stein 1848:186. Characters of the 

 family. Epimerite a small pointed papilla, cyst 

 dehiscence by simple rupture. Spores ellip- 

 soidal. 

 Family 2. Gregarinidae Labbe 1899:9. Associative or soli- 

 tary, satellite with septum, Epimerite symmet- 

 rical, simple. Cysts with or without spore ducts. 

 Genus 2. Gregarina Dufour 1828:366. Biassociative. 

 Epimerite small, globular or cylindrical. 

 Spores dolioform to cylindrical. Cysts dehisce 

 by spore ducts. 

 Genus 3. Hirmocystis Labbe 1899:12. Associations of 

 from two to twelve or more. Epimerite a 

 small cylindrical papilla. Cysts dehisce by 

 simple rupture. Spores ovoidal. 

 Genus 4, Hyalospora Schneider 1875:583. Biassociative. 

 Epimerite a simple globular knob. Cysts de- 

 hisce by simple rupture. Spores ellipsoidal. 

 Endoplasm yellow-orange. 



