24 



and drooping, narrow above. iEdoeagua with protruding 

 lounded plate (keel), orifice dentate without cornuti. 



Ostium simple; lobes small, wide apart; ductus bursa* 

 not thickened. Signum long — a few scattered points. 



Genus 7. Oxigrapha, Hb. type literana, L 



Oxigrapha literana, L. S.J. Capper. 2—1 



A development of Peroneidii closely allied to Rhacodia. 

 Valva trigonate; costa thickened; valvula bluntly 

 pointed; sacculus extends upward to near the costa, then 

 curves round in the form of a hook, terminating in a head 

 of spines; on the outer margin of the sacculus is a 

 projection at half. Socii ovate drooping. ZEdceagus with 

 slightly curved hook at orifice; cornuti three spines. 



Ostium naked, with minutely spined operculum; lobes 

 long, incurved. Signum rounded, spined. 



Genus 8. Chrosis, Gn. type bifasciana, Hb. 



Chrosis bifasciana, Hb. 3.W.M. 1—1 



A development of Peroneidii. 



Valva widest at base; costa not thickened; valvula 

 long; sacculus lobed near base, extending and joining costa 

 in a point; from the anal angle extend two projecting arms 

 (finger and thumb). Uncus not cleft; socii drooping, curved 

 inwardly. Cornuti three bulbed spines. 



Ostium plate narrow, lobes haidly produced. Signum 

 a scobinate crescent. 



IV. PHALONIADII. 



The species included in this group divide into several well- 

 marked genera; they form connecting links with previous 

 genera, especially with those of the group Cnephasidii. 

 Further species would form interesting material for study 

 and would probably be the means of throwing more light 

 on certain genera now only indicated by isolated examples. 

 Valvffl generally broad. Uncus often well developed. 

 Sacculus well developed. Cornuti strong. Female with 

 large dentations covering the bursa. 



