the Neighbourhood of Zanzibar. 247 
25. Astropyga radiata, Leske. 
Wasin, 10 fath. 
Echinide. 
26. Salmacis bicolor, Ag. 
Zanzibar ; Wasin, 10 fath. 
27. Salmacis sulcata, Ag. 
Zanzibar, 5 fath. 
28. Hipponoe variegata *, Leske. 
Zanzibar, 4 fath. 
29. Tripneustes gratilla, L. 
Zanzibar. 
30. Lchinostrephus molare, de Bl. 
Zanzibar. 
Echinometride. 
31. Echinometra oblonga, de Bl. 
Zanzibar, shallow water. 
32. Parasalenia gratiosa, A. Ag. 
Wasin, 10 fath. 
Clypeastride. 
33. Clypeaster reteculatus, L. 
Wasin, 10 fath. 
34. Laganum depressum, Lesson. 
Wasin, 10 fath. 
35. Echinodiscus auritus, Leske. 
~ Wasin. 
Cassidulide. 
36. Echinoneus cyclostomus, Leske. 
Zanzibar and Momba. 
* Misprinted by Prof. Ludwig's printer “ variegosta.” . 
