XVIII CONTENTS. 



Order III. Idotheoidea or Valvifera Continued. Page. 



Family XIV. Idotheida? 346 



Genus 57. Mesidotea 347 



Mesidotea entomon 348 



sabini 350 



Genus58. Chiridotea 352 



Chiridotea caeca 353 



tuftsii '. 354 



Genus 59. Idothea 356 



Idothea gracillhna 356 



urotoma 358 



fewkesi 359 



rectilinea ' 360 



metallica 362 



baltica 364 



ochotensis 366 



phosphorea 367 



Genus 60. Pentidotea 368 



Pentidotea resecata 369 



wosnesenskii 370 



white! 373 



stenops 375 



Genus 61. Synidotea 376 



Synidotea ritteri 377 



pallida 378 



erosa ., 379 



nebulosa 381 



angulata '. 382 



consolidata 383 



marmorata 384 



bicuspida 385 



laticauda 386 



harf ordi 387 



nodulosa 388 



laevis 389 



muricata 390 



picta 391 



Genus 62. Colidotea 393 



Colidotea rostrata 393 



Genus 63. Edotea 394 



Edotea acuta . 395 



triloba 396 



montosa 397 



Genus 64. Eusymmerus 398 



Eusymmerus antennatus 399 



Genus 65. Erichsonella 400 



Erichsonella attenuata 400 



filiformis 401 



floridana 403 



Genus 66. Cleantis 404 



Cleantis planicauda 404 



occidentalis 406 



heathii .. 407 



