53 
Fig. 4. M.ta.d. bif. (d < d’) from the top; (fragment). Hartn. IV, Cam. luc. Zeiss. 
Fig. 5. M. ta. (d>M), from the side. Hartn. IV, Cam. luc. Zeiss. 
Figg. 6, 7. M. ta. 9 > 90°. Two kinds, partly. Hartn. IV, Cam. luc. Zeiss. 
Figg. 8, 9, 10 and 11. M. ta. 9<90°. Showing the different forms of the 
top; partly. Hartn. IV, Cam. luc. Zeiss. 
Fig. 123, b and c. Three specimens of stars (st.) Hartn. VII, Cam. luc. Zeiss. 
Fig. 13. st?. (»Doppelstern” of Schmidt) Hartn. VII, Cam. luc. Zeiss. 
Fig. 14. st. Gigantic stellate Hartn. VII, Cam. luc. Zeiss. 
Fig. 14*. id. Hartn. IV, Cam. luc. Zeiss. 
Figsg. 15 and 16. id. Hartn. VII, Cam. luc. Zeiss. 
Figg. 16* and 17. Young gigantic stellates? Hartn. VII, Cam. luc. Zeiss. 
Figg. 18, 19 and 20. Stellates, as in fig. 13. 
Fig. 21. M. ta. d. bif. [9 > 90°; d>d’]. Very rare 'aberrant form. Hartn. 
IV, Oc. 3. proj. on the table. 
Figg. 22—26, 29—38. Isops pallida n. sp. 
(Figg. 25, 26, 29, 32, 33 and 35 are from var. z; the rest of var. £.) 
Fig. 22. M. ta. 9=90°. Top of one of the stout tetraxile spicules. The 
angle $ little more than 90°; the teeth etrongly bent, sharply poin- 
ted. Zeiss A, Cam. luc. Zeiss. 
Fig. 23. M. ta. 9< 90° (»recurvo-ternate”). The upper part. Zeiss A, Cam. luc 
Fig. 24. Half of ac?. Zeiss A, Cam. luc. Zeiss. 
Fig. 25. tr. ac. Hartn. IV, Cam. luc. Zeiss. 
Fig. 26. tr°. ac. Hartn. IV, Cam. luc. Zeiss. 
Fig. 29. Top of ac2. Very slender sharp pointed specimen. 
Fig. 30. Top of ac?. The end teat-shaped. Hartn. IV, Cam. luc. Zeiss. 
Fig. 31. Top of ac?. Hartn. IV, Cam. luc. Zeiss. 
Fig. 32. Top of ac?. Hartn. IV, Cam. luc. Zeiss. 
Fig. 33. ac?. Type of Renieridae. Hartn. IV, Cam. luc. Zeiss. 
Fig. 34. Fragment of M. ta. 9=90°; d sharply pointed, straight. Zeiss A, 
Cam. luc. Zeiss. 
Fig. 35. Fragment of M. ta. 990°; d bent sharply pointed. On the left side 
is represented the end of M. Zeiss A. Cam. luc. Zeiss. 
Fig. 36. Fragment of M. ta.; d blunt. Zeiss A. Cam. luc. Zeiss. 
Fig. 37. st. sp. Zeiss D, Cam. luc. Zeiss. 
Fig. 38. glst. Zeiss D, Cam. luc. Zeiss. 
Figg. 27, 28, 39—49. Isops sphaeroides n. sp. 
Fig. 27. tr. ac. f. Hartn. IV, Cam. luc. Zeiss. 
Fig. 28. st. Hartn. VII, Cam. luc. Zeiss. 
