Cxl INTRODUCTION. 



Family II, — Arachnidiidae. 

 Arachnidium, Hincks. 



Family III. — Flustrellidse. 

 Flustrella, Gray. 



Group ii. — Stolonifeba, Ehlers. 



a. Orthonemida, Hiucks. 



Family IV. — Vesicnlariidae. 



Vesicularia, J. V. 



Thompson. 

 Amathia, Lamouroux. 



Bowerbankia, Farre. 

 AvENELLA, Dalyell. 

 Farrella, Ehrenberg. 



Family V. — Buskiidae. 

 BusKiAj Alder. 



Family YI.— Cylindrceciidae. 

 Cylindrcecium, Hincks. 



Anguinella^ Van Bene- 

 clen. 



Family VII.— TriticellidsB. 

 Triticella, Dalyell. | Hippuraria, Busk. 



b. Campylonemida, Hincks. 



Family VIII. — ValkeriidsB. 

 Valkeria^ Fleming (part). 



Family IX. — MimosellidSB. 

 MiMOSELLA^ Hincks. 



Family X. — Victor ellidae. 

 VicTORELLA^ W. Savillc Kent. 



