ILLUSTRATIONS. XXXVlt 



Page. 

 FIG. 298. Sphseroma destructor, a, Maxilliped. b, Mandible (palp omitted) . 



c, First maxilla, d, Second maxilla 284 



299. Sphseroma pentodon. Maxiliiped 286 



300. Sphajroma pentodon. Abdomen 287 



301. Exosphaeroma amplicauda ( After Stimpson ) 289 



302. Exosphaeroma amplicauda. a, b, Mandibles, c, Maxilliped. d, 



Frontal lamina and clypeus 289 



303. Exosphaeroma rhomburum. Abdomen 290 



304. Exosphaeroma rhomburum. Maxilliped 290 



305. Exosphaeroma yucatanum. Abdomen 291 



306. Exosphaeroma yucatanum. a, Maxilliped. b, Frontal lamina and 



clypeus. (Diagrammatic) 291 



307. Exosphaeroma faxoni 292 



308. Exosphaeroma faxoni. a, Maxilliped. b, Frontal lamina, c, Sec- 

 ond maxilla 292 



309. Exosphaeroma octoncum. Maxilliped 293 



310. Exosphaeroma octoncum. Abdomen 293 



311. Exosphaeroma thermophilum 294 



312. Exosphaeroma thermophilum. Maxilliped 294 



313. Exosphaeroma dugesi (After Dollfus). a, Head and first thoracic 



segment, b, Abdomen and uropoda ^ 295 



314. Exosphaeroma dugesi. a, Mandible, b, Frontal lamina and cly- 

 peus. c, Maxilliped 295 



315. Exosphaeroma oregonensis (After Dana), a, Second antenna, b, 



General figure, c, Abdomen (underside) 297 



316. Exosphaeroma oregonensis. a, Maxilliped. b, Mandible, palp 

 removed, c, Mandible with palp, d, Frontal lamina and cly- 

 peus 297 



317. Exosphaeroma crenulatum 298 



318. Exosphaeroma crenulatum. Maxilliped 298 



319. Dynamene perforata. Last two thoracic segments and abdomen . . . 300 

 320. Dynamene perforata (After Moore), a, First antenna, b, Second 

 antenna, c, Male, d, Tip of maxilla, e, Mandible. /. Maxilli- 

 peds. g, Fourth leg. h, First leg. i, Seventh leg. j, Part of 



terminal segment of abdomen with uropod 300 



321. Dynamene glabra. Abdomen and last two thoracic segments 301 



322. Dynamene glabra. Second pleopod of male 301 



323. Dynamene angulata. Maxilliped 302 



324. Dynamene angulata. Abdomen 302 



325. Dynamene moorei- (After Mocre) 303 



326. Dynamene moorei. Second pleopod of male 303 



327. Dynamene dilatata. a, Head and first thoracic segment, b, Dor- 

 sal view 304 



328. Dynamene benedicti. Second pleopod of male (inner branch) 305 



329. Dynamene benedicti. Last thoracic segment and abdomen 305 



330. Paradynamene benjamensis. Abdomen and last thoracic segment 



of male 306 



331. Paradynamene benjamensis. a, First antenna. 6, c, Mandibles. 



d, First maxilla, e, Maxilliped 306 



332. Paradynamene benjamensis. Female (dorsal view ) 307 



333. Paradynamene benjauiensis. a, First pleopod of male, b, Second 



pleopod of male 307 



334. Cilicaea linguicauda. Abdomen 309 



335. Cilicaea granulosa. Last thoracic segment and abdomen 310 



