490 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxiii. 



Plate XXXIX. The male of Cecrops latreillii Leach. 



Fig. 243, Dorsal view; figs. 244 and 245, First and second antennae; fig. 246, Mouth- 

 tube and second maxillse; figs. 247 and 248, First and second maxillipeds; figs. 249 to 

 252, First, second, third, and fourth swimming legs; fig. 253, Ventral surface of genital 

 segment and abdomen of female, showing cement glands, spermatophores in position, 

 and the peculiar rolling of the lateral laminae of the abdomen; fig. 254, Ventral sur- 

 face of female with external egg-cases, showing how the laminae of the abdomen are 

 unfolded and straightened out over the ventral surface of the external egg-cases. 



Plate XL. The female of Orthagorisdcola muricata Kroyer. 



Fig. 255, Dorsal view; fig. 256, Second antenna; fig. 257, Mouth-tube and second 

 maxillae; fig. 258, Mandible; figs. 259 and 260, First and second maxillipeds; figs. 261 

 to 264, First, second, third, and fourth swimming legs; fig. 265, Ventral surface of 

 genital segment and abdomen, showing the coiling of the internal oviducts, sper- 

 matophores in position, and the lateral laminae of the abdomen. 



Plate XLI. The male and a chalimus of Orthagorisdcola muricata Kroyer. 



Fig. 266, Dorsal view of male; fig. 267, Second maxilliped; figs. 268 to 271, First, 

 second, third, and fourth swimming legs; figs. 272 and 273, Dorsal and ventral surfaces 

 of genital segment; fig. 274, Dorsal view of chalimus; figs. 275 to 278, First, second, 

 third, and fourth swimming legs. 



Plate XUI. The female of Philorthragoriscus serratus Kroyer. 



Fig. 279, Dorsal view; fig. 280, Mouth-tube and second maxillae; fig. 281, Mandibles; 

 fig. 282, Second maxilliped; figs. 283 to 286, First, second, third, and fourth swimming 

 legs; figs. 287 and 288, Ventral and dorsal views of the genital segment and abdomen; 

 fig. 289, Spermatophores in position. 



Plate XLIII. The male of Philorthragoriscus serratus Kroyer. 



Fig. 290, Dorsal view; fig. 291, Second antenna; figs. 292 and 293, First an(^ second 

 maxillipeds; fig. 294, Exopod of first swimming leg enlarged; figs. 295 and 296, Second 

 and third swimming legs. 



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