MUSEUM OF COMPARATIVE ZOOLOGY. 35 



Suborder DOCOGLOSSA. 



Super-Family PROTEOBRANCHIA. 



Family ACMtEID^E. 



Genus PECTINODONTA Dall. 

 Pectinodouta arcuata Dall. 



Super-Family ABRANCHIA. 

 Family ? 



Genus PROPILIDIUM Forbes & Hanley. 

 Propilidium ancyloide Forbes & Hanley.* 



Genus LEPETELLA Verrill. 

 Lepetella tubicola Verrill.* 



Subclass ISOPLEURA. 

 Super-Order POLYCONCH^E. 



Order POLYPLACOPHORA. 



Suborder CHITONACEA. 

 Super-Family EOCHITONIA. 



Family LEPTOCHITONID^E. 



Genus LEPTOCHITON Gray. 

 Leptochiton pergranatus Dall. 



Genus HANLEYIA Gray. 

 Hanleyia tropicalia Dall. 



Family ISCHNOCHITONID^E. 



Genus ISCHNOCHITON (Gray) Carpenter. 



Section STENOPLAX Carpenter. 

 Ischnochiton limaciformia Sowerby. 



