Contents 



Page 



Acknowledgments vi 



Introduction 1 



Taxonomic section 2 



Taxonomic characters 2 



Illustrations and measurements 6 



Key to the Caprellidae of the western North Atlantic 6 



Aeginella spinosa Boeck (figs. 2, 3, 54) 8 



Aeginina longicornis (Kr03'er) (figs. 4-7, 54) 13 



Caprella andreae Mayer, new rank (figs. 8, 9, 55) 19 



Caprella bermudia Kimkcl 22 



Caprella danilcvskii Czerniavski (figs. 10, 11, 55) 22 



Caprella equilibra Say (figs. 12, 13, 55) 25 



Caprella linearis (Linnaeus) (figs. 14, 22, 51) 30 



Caprella longimanus Stimpson 33 



Caprella penantis Leach (figs. 15, 16, 51) 33 



Caprella sanguinea Gould 40 



Caprella scaura Templeton (figs. 17, 18, 55) 40 



Caprella septentrionalis Kr0yer (figs. 1 9-22, 51) 44 



Caprella unica Mayer (figs. 23, 24, 55) 49 



Deutella californica Mayer (fig. 52) 54 



Deutella mayeri Stebbing (figs. 25, 26, 52) 54 



Fallotriiella biscaynensis, new genus, new species (figs. 27, 28, 53) 58 



Heniiaegina minula Mayer (figs. 29, 30, 50) 61 



Hemiproto wigleyi, new genus, new species (figs. 31, 32c-e, 50) 65 



Luconacia incerta Mayer (figs. 33-35, 52) 68 



Mayerella limicola Huntsman (figs. 36, 50) 73 



Maycrella redunca, new species (figs. 37, 38, 50) 75 



Meiaprotclla hummel incki, new species (figs. 39, 40, 50) 78 



Paracaprella pusilla Mayer (figs. 32a-b, 41, 42, 53) 82 



Paracaprella tenuis Mayer (figs. 43, 44, 53) 86 



Pariambus typicus f . cumana Mayer 89 



Phtisica antillensis ( Mayer) (figs. 45, 54) 89 



Phtisica marina Slabber (figs. 46, 47, 54, 56) 90 



Proaeginina norvegica (Stephensen) (figs. 48, 54) 97 



Pseudaeginella antiguae Barnard 100 



Ecology 100 



Zoogeography 10 1 



Relationship between the amphipod suborders Gammaridea and Caprel- 



lidea 107 



Literature cited 112 



V 



