Reports on the scientific results of the expedition to the tropical Pacific, in charge of Alexander Agassiz, by the U.S. Fish Commission Steamer Albatross, from August,1899, to March, 1900, Commander Jefferson F. Moser, U.S.N., commanding. IX. Reports on

TABLE OF CONTENTS. Page Introduction 25 Ocypode ceratoplithalma 26 Ocypode cordimana 26 Uca tetragonon 26 Uca gaimardi 26 Cardisoma carnifex 26 Cardisoma rotundum 27 Grapsus grapsus tenuicrustatus ... 27 Grapsus strigosus 27 Grapsus longitarsis 28 Geograpsus grayi 28 Geograpsus crimpes 28 Geograpsus lividus stormi 29 Leptograpsus variegatus 29 Metopograpsus messor 29 Pacliygrapsus transversus 29 Pachygrapsus plicatus 29 Pacliygrapsus fakaravensis, PI. 5, Fig. 1; PI. 9, Figs. 6,6a 29 Pachygrapsus minutus 30 Pachygrapsus longipes 30 Ptychognathus easterana, PI. 2, Fig. 4; PL 7, Figs. 4, 4 a. 31 Pseudograpsus albus 32 Heraigrapsus elongatus, PI. 2, Fig. 2; PI. 7, Figs. 2, 2 a 32 Sesarma (Sesarma) rotundatum ... 33 Sesarma (Sesarma) trapezoideum . . 33 Sesarma (Parasesarma) plicatum . . 34 Sesarma (Parasesarma) carolinensis, PL 5, Figs. 2,2 a; PL 9, Fig. 1 . . 34 Sesarma (Holometopus) obtusifrons . 35 Sesarma (Holometopus) villosum . . 35 Helice leachii 36 Cyclograpsus lougipes 36 Cyclograpsus parvulus 36 Plagusia speciosa 36 Plagusia dentipes 36 Percnon planissimum 37 Pack Carpilius maculatus 37 Carpilius couvexus 37 Carpilodes tristis 37 Carpilodes rugatus .37 Carpilodes monticulosus 37 Atergatis ocyroe 37 Platypodia anaglypta 38 Platypodia digitalis, PL 1, Fig. 6; PL 9, Figs. 4, 4 a 38 Zosimus aeneus 38 Lophozozymus dodone 39 Leptodius sanguineus 39 Leptodius gracilis 39 Leptodius efferens, PL 1, Fig. 11 ; PL 7, Figs. 6, 6 a 39 Xanthodius cristatus 41 Cyoloxanthops cavatus, PL 5, Fig. 8; PL 6, Figs. 3, 3 a 41 Etisus laevimanus 42 Etisodes electra 42 Actaea tomentosa 42 Actaea affinis 42 Actaea hirsutissima 42 Actaea remota, PL 1, Fig. 9 ; PL 7, Fig. 1 43 Actaea rufopunctata 43 Actaea cavipes, PL 1, Fig. 2 .... 44 Daira perlata 44 Xanthias lamarckii 44 Xanthias ponapensis, PL 7, Figs. 5, 5 a 44 Xanthias notatus 45 Xanthias canaliculars 45 Chlorodiella niger 46 Chlorodiella laevissima 46 Phymodius ungulatus, Pis. 3, 4 . . . 46 Chlorodopsis venusta, PL 1, Fig. 5 . . 49 Chlorodopsis spinipes, PL 2, Fig. 5 . 49 Chlorodopsis scabricula, PL 1, Fig. 3; PL 9, Fig. 5 50