PLATE II. 



Fig. i. Sergestes seminudus n. sp. (Continued). 

 Fig. ia. Sixth joint and distal part of fifth joint of third maxilliped ; X 12. 

 Fig. \b. Distal part of first thoracic leg; >< 12. 

 Fig. 1 c. Carapace, anterior appendages and the two anterior abdominal segments of an Acantliosoma, from 



above; >< scarcely 16. The four processes on right half of the carapace and the distal part of 



the antennas omitted. <z.' antennula; a. 2 antenna; sq. squama. 

 Fig. ld. Carapace, left eye and proximal parts of left antennula and antenna of another Acantliosoma, from 



the left side ; X 34- s 1- squama. 

 Fig. ie. Dorsal part of the five anterior abdominal segments of an Acantliosoma, from the left side; >< 30. 

 Fig. if. Terminal part of sixth abdominal segment, telson and left uropod of an Acantliosoma, from above; X 35- 



Fig. 2. Sergestes orientalis n. sp. 

 Fig. 2a. Front end of the carapace of a male, from the left side; X 14. 

 Fig. 2b. Lower flagellum of right antennula of a male, from the outer side; X 35- 

 Fig. 2.c. Left third maxilliped — the basal joint omitted — of a male, from the outer side; X 9- <*■• the 



six subjoints of sixth joint and the end of fifth joint; X 20. 

 Fig. 2d. First left thoracic leg of the same male, from the outer side; X 9- 

 Fig. 2e. Distal part of the same first thoracic leg, from the outer side; X 34. 

 Fig. 2/". Fourth left thoracic leg of the same male, from the outer side; X 9- 

 Fig. 2g. Left petasma, from behind ; ; 30. a. pars astringens ; lam. lamina externa, and pu. processus 



uncifer, both portions of pars externa; pb. processus basalis. 

 Fig. 2 h. Distal portion of pars media of the same petasma, from behind; X 48. la. lobus armatus, bifurcate; 



Ie. lobus connectens; li. lobus inermis; It. lobus terminalis; lac. lobus accessorius; pv. processus 



ventralis. 

 Fig. 2z. Same distal portion of pars media of left petasma, from in front; X 48. The lettering as in fig. 2/1. 

 Fig. 2k. Distal portion of pars media of left petasma of a male from lat. 19 14' N., long. 116° 6' E., from 



behind; X 47. The lettering as in fig. 2/1. 

 Fig. 2/. Carapace with eyes, major part of the antennulae, and antennal squamae of a Mastigopus, 4.3 mm. 



long, from above; X 16. 

 Fig. 2m. Distal part of left third maxilliped of a Mastigopus, 10.8 mm. long, from the outer side, X 22. 

 Fig. 211. Sixth abdominal segment with telson and left uropod of a young Mastigopus measuring 3.3 mm., 



from the left side ; X 23. Setas on the upper margin of the exopod omitted. 

 Fig. 20. Carapace with eyes, antennula;, antennal squamas and first abdominal segment of an Acantliosoma, 



from above; X 20. «.' antennula; sq. squama. 

 Fig. 2p. Carapace with left eye, antennula, antennal squama and proximal part of antennal flagellum of 



another Acantliosoma, from the left side ; X 20. 

 Fig. 2q. Posterior part of sixth abdominal segment with telson and left uropod of the Acantliosoma shown 



in fig. 20, from above; X 32. 



Fig. 3. Sergestes Edwardsii Kr. 

 Fig. 3a. Distal portion of pars media of left petasma of a specimen from the Atlantic at lat. 3°9' N., long. 

 23°ii'W., from behind; X 47- The lettering as in fig. 2/1. 



Fig. 4. Sicyonella maldivensis Borradaile. 

 Fig. 4a. Anterior right part of carapace with eye, antennula and antennal squama of a male from Stat. 164, 



from above ; X 9- 

 Fig. 4b. Anterior right part of carapace with eye, antennula and antennal squama of a female from Stat. 164, 



from above ; X 9- 

 Fig. 4c. Terminal part of right antennular peduncle with the proximal parts of both flagella of a male, 



from the inner side; X 24. 

 Fig. 4d. Distal joints of first thoracic leg of a female, from below; X 22. 

 Fig. 4e. Left petasma, from behind; '/ 21. a. pars astringens; lam. lamina externa, and pu. processus 



uncifer, of pars externa. 

 Fig. 4/. Distal half of pars media of the same petasma, from behind; X 42. la. lobus armatus; Ie. lobus 



connectens; It. lobus terminalis; pv. processus ventralis, ramified (see text). 

 Fig. 4g. Same distal portion of pars media of the petasma, from in front; X 42. The lettering as in fig. 4/'. 



Fig. 5. Sicyonella antennata n. sp. 

 Fig. 5#. Terminal part of right antennular peduncle with the proximal parts of both flagella of a male, 



from the outer side; X 21. 

 Fig. 5^. Distal joints of first thoracic leg of a female, from below; X 20. 

 Fig. 5 f. Distal part of third thoracic leg of the same female; X 20. 



