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On the generic limits in the Family Pilidae (Prosobranchia: Mollusca)

Published in Breviora, in 1961, in volume 133, pages 1-10

Enzymatic constitution of Alsophis saliva and its biological implications

Published in Breviora, in 1961, in volume 134, pages 1-8

Notes on Hispaniolan Herpetology 2. A review of the Anolis semilineatus group with the description of Anolis cochranae, a new species

Published in Breviora, in 1961, in volume 135, pages 1-11

Notes on Hispaniolan Herpetology 3. The evolution and relationships of the Anolis semilineatus group

Published in Breviora, in 1961, in volume 136, pages 1-8

Notes on Hispaniolan herpetology 4. Anolis koopmani, new species, from the southwestern peninsula of Haiti

Published in Breviora, in 1961, in volume 137, pages 1-4

Pfeiffer's unfigured species of Strophocheilus (Megalobulimus)

Published in Breviora, in 1961, in volume 138, pages 1-8

A new species of Sphaerodactylus from northern Haiti

Published in Breviora, in 1961, in volume 139, pages 1-5

A preliminary review of the nearctic species of Sierolomorpha (Hymenoptera)

Published in Breviora, in 1961, in volume 140, pages 1-12

Three new toads from South America: Bufo manicorensis, Bufo spinulosus altiperuvianus and Bufo quechua

Published in Breviora, in 1961, in volume 141, pages 1-8

Australian carabid beetles VI. The tropical and some subtropical species of Pamborus, Mystropomus, and Nurus

Published in Breviora, in 1961, in volume 142, pages 1-13

Miocene lizards from Colombia, South America

Published in Breviora, in 1961, in volume 143, pages 1-11

A large ophiacodont pelycosaur from the Pennsylvanian of the Pittsburgh region

Published in Breviora, in 1961, in volume 144, pages 1-7

A new species of the cetomimid genus Gyrinomimus from the Gulf of Mexico

Published in Breviora, in 1961, in volume 145, pages 1-2

New rodents from, the early Miocene deposits of Sixty-Six Mountain, Wyoming

Published in Breviora, in 1961, in volume 146, pages 1-7

Australian carabid beetles VIII. Leiradira, especially the tropical species

Published in Breviora, in 1961, in volume 147, pages 1-12

Australian carabid beetles IX. The tropical Notonomus

Published in Breviora, in 1961, in volume 148, pages 1-14

A preliminary study of the Silurian ceratiocaridids (Crustacea: Phyllocarida) of Lesmahagow, Scotland

Published in Breviora, in 1961, in volume 149, pages 1-9