MUSEUM OF COMPARATIVE ZOOLOGY. 35 



Suborder DOCOGLOSSA. 



Super-Family PROTEOBRANCHIA. 



Family ACMii:iD^. 



Genus PKCTINODONTA Dall. 

 Pectinodonta arcuata Dall. 



Super-Family ABRANCHIA. 



Family ? 



Genus PROPILIDIUM Forbes & Hanlet. 

 Propilidium ancyloide Forbes & Hanley.* 



Genus LEPETELLA Verrill. 

 Lepetella tubicola Verrill.* 



Subclass ISOPLEURA. 

 Super-Order FOLYCONCH^. 



Order POLYPLACOPHORA. 



Suborder CHITONACEA. 

 Super-Family EOCHITONIA. 



Family LEPTOCHITONID^. 



Genus LEPTOCHITON Gray. 

 Leptochiton pergranatus Dall. 



Genus HANLEYIA Gray. 

 Hanley la tropicalia Dall. 



Family ISCHNOCHITONID^. 

 Genus ISCHNOCHITON (Gray) Carpenter. 



Section STENOPLAX Carpenter. 

 lachnochiton limaciformia Sowerby. 



