252 



U.S. NATIONAL MUSEUM BULLETIN 2 92 



Macrophthalminae, 223 

 Macrotcrocheir, subg., 93 

 Macrura, 5 (list) 

 maculatus, Grapsus, 163 

 major, Astacus, 93 

 Cancer vocans, 213 

 Squilla, Crangon, Americana, 93 

 Uca, 7 (list), 15 (distribution), 33 

 (ecology), 203 (key), 210 (figs. 71z, 

 j), 213-214, 213 (fig. 72) 

 maracoani, Uca, 3 

 margaritacea, Ataya, 63 

 marginatus, Callinectes, 5 (list), 15 

 (distribution), 33 (ecology), 127 

 (key), 131-132, 135 (fig. 37d) 

 Neptunus, 131 

 marginatus var. larvatus, Callinectes, 



132 

 Mesocaris, 21 

 Metagrapsus pectinatus, 3 

 Metasesarma, 18, 32, 175 

 rubripes, 6 (list), 15 (distribution), 33 

 (ecology), 156 (key), 175-177, 176 

 (fig. 56), 178 (fig. 58e) 

 Metopaulias, 18, 19, 28 (origin), 30, 31, 

 177 

 depressus, 6 (list), 14 (distribution), 

 26, 34 (ecology), 37, 157 (key), 177- 

 178, 177 (fig. 57), 178 (fig. 58/) 

 Metopograpsus brasiliensis, 176 

 dubius, 169 

 gracilis, 167 

 miniatus, 169 

 mexicana, Atya, 63 

 Caridina, 79 

 Ortmannia, 79 



Potimirim, 5 (list), 15 (distribution), 

 20, 33 (ecology), 38, 57 (key), 79, 

 86 (fig. 19d) 

 Mexicana, Atyoida, 79 

 mexicanus, Palaemon, 89 

 Micraitya poeyi, 70 



Micratya, 3, 18, 19, 28 (origin), 36 

 (ecology), 70, 75, 76 

 poeyi, 5 (list), 14 (distribution), 19, 

 33 (ecology), 36, 57 (key), 70-76, 

 71 (fig. 12), 72 (fig. 13), 73 (figs. 

 14/i, t) 

 Poeyi, 70 

 Micratyia poeyi, 70 

 Mictyrinae, 223 i 



miersii, Sesarma (Holometopus), 3, 6 

 (list), 15 (distribution), 33 (ecology), 

 35, 157 (key), 180-182, 180 (fig. 

 59), 187, 190 (figs. 62(/-z); pi. 4a 

 (habitat) 



minax, Panopeus Herbstii, 154 



miniata, Sesarma, 183 



miniatus, Metopograpsus, 169 



minor chelis denticulatis, Astacus, 93 



Minuca, subg., 211 



monae, Typhlatya, 5 (list), 14 (distri- 

 bution), 19-21, 30, 31, 34 (ecology), 

 38, 57 (key), 80-81, 80 (fig. 16) 



Monolepis inermis, 204 



montezumae, Bithj^nis, 93 

 Cambarellus, 2 



Montezumae, Palaemon, 93 



Montrichardia, 209 



arborescens, 162, 209; pi. 4a (habitat) 



mordax, Uca, 28, 219 



mullerii, Sesarma, 182 



multidentatus, Dilocarcinus, 152 



murifecenta, Uca, 217, 219 



Nasoscopus, Astacus, 57 



Natantia, 4 (list) 



Neopseudothelphusa, 147 



Neopseudothelphusa, subg., 3, 143 



Neptunus marginatus, 131 



Neritina punctulata, 126 



niveus, Procambarus, 5 (list), 14 (dis- 

 tribution), 24, 34 (ecology), 38, 

 117 (key), 120 (fig. 31d) 



notialis, Penaeus duorarum, 4 (list), 

 15 (distribution), 33 (ecology), 52 

 (key), 63-64, 54 (fig. 5), 56 (fig. 7c) 



obesa, Panopeus herbstii f., 154 

 obesus, Panopeus Herbstii var., 154 

 occidentalis, Atj^a, 58, 61 



Atyia, 58 



Cyclograpsus, 174 



Geograpsus, 158 

 Ocj^poda albicans, 204 



arenaria, 204 



gigantea, 195 



heterochelos, 213 



lateralis, 198 



rubra, 200 

 Ocypode, 3, 204, 207, 223 



albicans, 204 



arenarius, 204 



cordata, 219 



