PLATE XXXYIII. 



Figs. 1-7. Heteromysis hermudensis, u. sp. 



Fig. 1. Adult female, from right side ; magnified about eighteen times. 



Fig. 2. Same, from above. 



Fig. 3. Left antenuular peduncle, from above. 



Fig. 4. Antennal scale. 



Fig. 5. Telson, from above. 



Fie. 6. Young, in pupa-stage, extracted from the marsupial pouch, and viewed from right side ; highly magnified. 



Fig. 7. Same, from below. 



Figs. 8-14. Ecto- Parasites of Schizopoda. 



Y'v. 8. Iletcrophri/xits appeiidkulatus, n. gen. et sp., affixed to the dorsal face of a specimen of Enphausia 

 peUueida; lateral view, a, female ; /;, male. 



Fi<T. 9. Notophryxns lateralis, n. sp. («), affixed to base of penultimate gill of a specimen of Nematoscelis 

 megalops ; lateral view. 



Fig. 10. Same parasite together with male {a), from below ; more highly magnified. 



Fi". 11. Notophri/xus glohularis, n. sp. (a), affixed to the posterior part of the dorsal face of carapace ui a 

 specimen of Thysanoessa (/rec/cma ; lateral view. 



Fig. 12. Dajiis sirielke, n. sp., female, with male (a) affixed, viewed from above ; highly magnified. 



Fig. 13. Same (female and male), from below. 



Fig. 14. Male, isolated and viewed from above ; more highly magnified. 



Figs. 15-23. Endo-Parasites of Schizopoda. 



Fi". 15. Echtnurliijiichas cornigalas, n. sp., lying within the perivisceral cavity of a specimen of Euphausia 

 pHluddu ; lateral view. 



Fig. 16. Same, isolated, and more highly magnified. 



Fig. 17. Anterior extremity of same, with proboscis protruded. 



Fig. 18. One of the hooks from the proboscis; highly magnified. 



Fi"-. 19. Didmnum filifenui), Leuckart, M.S., attached within the perivisceral cavity of a specimen of Nemato- 

 scelis mcgalopis ; lateral view. 



Fi". 20. A specimen of the parasite, together with the sac-like body, isolated, and viewed from below. 



Fi". 21. Another si)ecimen, with the byssus thread exserted, from left side. 



Fig. 22. Fragment of a byssus thread together with a number of fine adhesive fibres; highly magnified. 



Fig. 23. A packet of adhesive fibres. 



