PLATE XVI. 



Fig. I. Stylocheiron carinatum G. O. Sars. 



Fig. ia. Anterior part of an adult male from Stat. 189', from above ; X 21. 



Fig. il>. Anterior part of another male, from the side; X 21. 



Fig. \c. Upper right antennular flagellum of the male from Stat. 189', from above; x 51. 



Fig. ld. Lower left antennular flagellum of the same male, from the outer side; X 45. 



Fïg. ie. Anterior part of an adult female from Stat. 276, from above; X 21. 



Fig. i/. Copulatory organ of first left male pleopod, unrolled and seen from behind; x 88. 



Fier. 1 o-. Inner and median lobes with their processes of the same organ, from behind; x 237. ƒ>'. spine- 

 shaped process; p 2 . terminal process; p 3 . proximal process; /> 4 . lateral process; c. coupling hooks. 



Fi°\ ik. Inner and median lobes with their processes. of left organ of another specimen, from behind; X 237 



Fig. 2. Stylocheiron insulare n. sp. 



Fig. 2a. Anterior part of an adult male from Stat. 118, from above; x 15. 



Fig. 2Ó. Anterior part of an adult female from Stat. 185, from above; X 15. 



Fig. 2c. Anterior part of an adult female from Stat. 143, from the side; X 18. 



Fig. 2d. Right antenna -- major part of flagellum omitted — of an adult female, from above; x 23. 



Fig. 2e. Distal part of second right thoracic leg of a female, from the inner side; x 44- 



Fig. 2f. Posterior part of abdomen of an adult female, from the side; X 20. 



Fig. 2g. Sixth abdominal segment with the basal parts of telson and left uropod of another female, from 



the side ; x 20. 



Fig. 2/1. Copulatory organ of first left male pleopod, unrolled and seen from behind; x 122. 



Fig. 2i. Inner and median lobes with their processes of the same organ, from behind; X 480. 



Fig. 3. Stylocheiron microplu halma n. sp. 



Fig. 3^. Anterior part of a subadult male from Stat. 12S, from the side; x 23. 



Fig. 3#. Right antenna — major part of flagellum omitted — of an adult female, from above; x 27. 

 Fig. 3c. Posterior part of abdomen of an adult female, from the side; x 20. 



Fig. 3^. Inner and median lobes with their processes of left copulatory organ of an adult male, from 

 behind ; X 360. The spine-shaped process, rendered with dotted lines, was lost. 



Fig. 4. Stylocheiron affinc n. sp. 



Fig. 4a. Anterior part of an adult male from Stat. 203, from the side; x 23. 



Fig. 4.I'. Right antennula of an adult male, from above; X 25. 



Fig. 4c. Copulatory organ of first left male pleopod, unrolled and seen from behind ; x 89. 



Fig. \d. Inner and median lobes with their processes of the same organ, from behind; X 360. 



Fig. 5. Stylocheiron longicorne G. O. Sars. 



Fig. $a. Anterior part of an adult male from Stat. 203, from the side; x 23. 



Fig. 50. Terminal, proximal and lateral processes with the inner margin of the median lobe of left copulatory 

 organ, from behind; X 300. 



Fig. 6. Stylocheiron maximum H. J. H. 



Fig. 6a. Anterior part of an adult male from the North Atlantic (lat. 6i°49' N., long. i4°n'W.), from 



the side ; x 8. 

 Fig. 6b. Hand of second left thoracic leg of the adult female captured by the "Siboga", from the outer 



side; x il- 

 Fig. 6c. Copulatory organ of first left pleopod of the male from the North Atlantic, unrolled and seen 



from behind 5X31. 

 Fig. 6d. Inner and median lobes with their four processes of the same organ, from behind; X 128. 



