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UNITED STATES NATIONAL MUSEUM BULLETIN 296 



Inasmuch as the rest of the order can be readily differentiated to 

 family on the basis of the number of terminal cirri and the presence 

 of the caudal appendage, it is reasonable that genera possessing a 

 variation in the number of terminal cirri should be separated to 

 reflect this most fundamental feature of the order. 



Australophialus melampygos (Berndt, 1907b) 

 Figure 31 

 Cryptophialus melampygos Berndt, 1907b, page 288. 



Diagnosis: Australophialus with opercular margin entire, not 

 notched; opercular margin with distinct, short spines; in New Zealand 

 shells. 



Distribution: Abundant along the length of New Zealand, from 

 North Auckland to Steward Island, on both east and west coasts, 

 in many species of gastropods, pelecypods, chitons, and one record 

 from the thoracican Elminius plicatus. 



Type-material: Types unknown. Reference specimens in Otago 

 Museum, Dunedin, New Zealand (A64.4), British Museum, SFSC, 

 Seto, and USNM. Additional material to all of specimen deposition 

 list (page 2), and bulk-labeled to a hundred museums. 



Figure 31. — Australophialus melampygos 

 (Berndt, 1907a), from Perna canalicu- 

 lata from Portobello, New Zealand: 

 a, female side view; b, detail of oper- 

 cular horizon. 



