TABLE OF CONTENTS. 



Alexander, C. P., and W. L. McAtee. Diptera of the 



superfamily Tipuloidea found in the District of Colum- Page. 



bia. No. 2344. December 7, 1920 ^ 385-435 



Barbour, Thomas, and G. K. Noble. Amphibians and 

 reptiles from southern Peru collected by the Peruvian 

 Expedition of 1914-1915 under the auspices of Yale 

 University and the National Geographic Society. No. 



2352. January 6, 1921^. 609-620 



New species: Oreosaurus anomalus, ProctoportLS obesus, Drepanodon 

 attenuatus. 

 Bartsch, Paul. The west American mollusks of the fami- 

 lies Rissoellidae and Synceratidae and the Rissoid genus 



Barleeia. No. 2331. November 9, 1920 ^ 159-176 



New species: Rissoella excolpa, Syncera panamensis, S. magdale- 

 nensis, Barleeia dalli, B. bentleyi, B. sanjuanensis, B. oldroydi, B. 

 californica, B. orcutti, B. coronadoensis, B. carpenteri. 



Bartsch, Paul, and John B. Henderson. A classifica- 

 tion of the American operculate land mollusks of the 



family Annulariidae. No. 2327. July 8, 1920 » 49-82 



New genera: Chondrothyixi, Rhyddothyra, Torrella, Abbottella, 



Eutudora. 

 New subgenera: Chondropoviatus, Chondropomium, Chondropo- 

 metes, Chondropomartes, Chondropomorus, Chondrothyrium, Chon- 

 drothyroma, Chondrothyra, Chondrothyretes, Parachondrisca, Para- 

 chondrella, Parachondrops, pisthosiphona, Torrella, Torrellisca, 

 Adamsiellops, Annularisca, Annularosa, Annularita, Annula- 

 rella, Annularops, Annularodes, Tudorellata, Tudorisca, Tudo- 

 rops, Eutudorisca, Eutudorella, Eutudora, Eutudorops. 

 New species: Parachondria (Parachondria) gonavicola, Torrella 

 {Torrellisca) simpsoni, Tudora (Tudora) abbotti, Eutudora {Eu- 

 tudorops) azucarensis. 

 New family: Annulariidae. 



New subfamilies: Chondropominae, Bhytidopominae, Adamsielli- 

 nae, Annularinae. 



Bean, Barton A. See Fowler, Henry W 307-321 



Berry, S. Stillman. Preliminary diagnoses of new cepha- 

 lopods from the western Atlantic. No. 2335. Novem- 

 ber 10, 1920 1 293-300 



New genera: Chiroteuthoides, Enoptroteuthis. 

 New subgenus: Ascoteuthis. 



New species: Chiroteuthoides hastula, Enoptroteuthis spinicauda, 

 Teuthowenia {Ascoteuthis) corona, Sandalops pathopsis, S. ectham- 

 bu^, Pyrgopsis lemur, Polypus scorpio. 



' Date of publication. 



