X LIST OF ILLUSTRATIONS. 



Pa^e. 



Fig. 29. ScalpeUum nipponense, lateral view 74 



30. ScalpeUum imperfectum, lateral view of type 75 



31. Scalpellnm sanctii'harbanv. a, type; h, a young individual 77 



32. a, b, Octolasmis geryonophilu; c, 0. mulleri; d, O.forresti 94 



33. Octolasmis americanuin. a, carinal; b, basal, and c, lateral views of the 



type; d, lateral view of an old individual 96 



34. Segments from the 6th cirrus of (A) Paralepas percarinaht, (B) Ifeter- 



alepas rex, and ( C) Alepas pacifica 100 



35. Heieralepas cygnus 102 



36. Alepas paciftca 105 



PLATES. 



Facing page. 



Plate I. ScalpeUum stroemii and its subspecies 122 



II. ScalpeUum giganteum, fig. 1; >S'. regium latidorsum, figs. 2, 3, 7; *S'. re- 



g'ma, figs. 4, 5, 6; S. regium, fig. 8; *S. regium, variet}', figs. 9, 10.. - 122 



III. ScalpeUum giganteum, fig. 1; S. veluiinum, figs. 2, 3; S. regium, figs. 



4, 5 122 



IV. ^Mandibles, maxilla^ and cirri of Lepadida: 122 



V. Mandibles, maxilla', and cirri of Lepadidx 122 



VI. Pwcilasma k^cmpferi litum, hga. 1, 2; P. kiempferi, figs. 3, 4,5; P. in- 

 ivquilaterale, figs. 6, 7, 8, 11, 12; P. i. breve, figs. 9, 10; P. kxmpferi 



novseanglisc, figs. 13, 14 122 



VII. Megalasma subcarinaium, figs. 1, 2, 3, 4, 5; M. gracile gracilius, figs. 6, 

 7, 8, 9; 3/. rectum, figs. 10, 11, 12, 13, 14; 31. annandalei, figs. 15, 16. 



17, 18, 19 .^. 122 



VIII. Lepas anserifera, figs. 1, 3; L. liillii, fig. 2; L. pectinatu, varieties, figs. 



4, 5, 6; L. hillii, fig. 7; L. peclinata, fig. 8 122 



IX. Conchodermavirgatum, &g. 1; C. auritum, fig. 2; Lepas anat if era, figs. 



3, 4, 5; L. fascicularis, fig. 6 122 



X. IWnica euglypta, figs. 1, 2, 3; F. darwini, figs. 4, 5, 6, 7, 8 122 



XI. J^erruca culotheca, figs. 1, 2, 3; T. Jioeki, figs. 4, 5, 6; T. nexa alba, 



figs. 7,8 122 



