PLATE XVL 



Fig. I. Styloclieiron carinatum G. O. Sars. 



Fig. \a. Anterior part of an adult male from Stat. 1S9', from above; X 21. 

 Fig. \b. 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 S'- 

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

 Fio-. \t\ Anterior part of an adult female from Stat. 276, from above; X 21. 

 Fio-. i/. Copulatory organ of first left male pleopod, unrolled and seen from behind; X 88. 

 Fif^. \g. Inner and median lobes with their processes of the same organ, from behind; x 237. />'. spine- 

 shaped process; /-. terminal process; /I proximal process; /■*. lateral process; c. coupling hooks. 

 Fio-. \h. Inner and median lobes with their processes of left organ of another specimen, from behind; X 237_ 



Fig. 2. Stvlocheiron insulare n. sp. 



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



Fio-. 2b. Anterior part of an adult female from Stat. 185, from above; X 15. 



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



Fio-. 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. 2/. Posterior part of abdomen of an adult female, from the side; X 20. 



Fio-. 2 o; Sixth abdominal segment with the basal parts of telson and left uropod of another female, from 



the side; X 20. 

 Fio-. 2h. Copulatory organ of first left male pleopod, unrolled and seen from behind; X 122. 

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



Fig. 3. Styloclieiron inicroplitliahita n. sp. 



Fig. la. Anterior part of a subadult male from Stat. 128, from the side; X 23. 



Fio. 3/;. Right antenna" — major part of flagellum omitted — of an adult female, from above; x 27. 

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



Fio. 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. Styloclieiron ajfine n. sp. 



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



Fig. \b. Right antennula of an adult male, from above; X 25. 



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



Fio. 4,/. Inner and median lobes with their processes of the same organ, from behind; X 360. 



Fig. 5. Styloclieiron longicorne G. O. Sars. 



Fio. 5^. Anterior part of an adult male from Stat. 203, from the side; x 23. 



Fio. 5/;. Terminal, proximal and lateral processes with the inner margin of the median lobe of left copulatory 

 organ, from behind; X 300. 



Fig. 6. Styloclieiron viaximuni H. J. H. 



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



the side; x 8. 

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



side; X II- 

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



from behind ; X 3 1 • 

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



