1894.] MICROSCOPICAL JOURNAL. 115 



(Cephalis commonly large, with one or more horns). 



Acanthocorys. 



No ribs in thorax. Peristome with free terminal feet. 



(Cephalis well developed with horn). 

 Six feet A?ithocyrto7na. 



Six feet A^ithocyrtis. 



Twelve feet, or more Anthocyrtimn. 



Feet outside constricted peristome Anthocyrtidiuin. 



(Cephalis hidden. No horn). Carpocaniu^n. 



32.— Family : SETHOCYRTIDA. No radial apophy- 

 ses. 



MOUTH OP THORAX OPEN. 



Thorax conical or campanulate. iSethocoims. 

 Thorax cylindrical or ovate, with truncate, constricted 

 or tubular mouth. 



One horn. Mouth simple. iSethocyrtis. 



One horn. Mouth tubular. Sethocorys. 



Two horns or a bunch. Lo'pho'phcina. 



No horn. Dictyocephalus. 



MOUTH OF THORAX CLOSED. 

 Horn. Sethocapsa. 



No horn. Bicolocapsa. 



SECTION C. CEPHALIS THOEAX AND ABDOMEN. 

 (3 JOINTED SHELL). 



33.— Family: PODOCYRTIDA. Three radial apophy- 

 ses. 



MOUTH OPEN. 



Three free limbs or wings on thorax (partly on abdo- 

 men). 



No free external apophyses on abdomen. 

 Three wings of thorax solid. Pterocorys. 



Free apophyses on abdomen. 

 Three ribs prolonged into 3 feet. Ribs and feet solid. 



Theopodimn. 



