1890.] NATURAL SCIENCES OF PHILADELPHIA. 339 



Report upon the Echini collected by the U. S. Fish Com- 

 mission Steamer " Albatross" in the Gulf of Mexico from 

 January to March, 1885, ibid. p. 606. 

 1886. Hjalnuir Theel. Report on the Holothuroidea dredged by 

 H. M. S. Challenger during the years 1873-1876. 

 Includes faunal lists and description of West Indian species, 



1886. Hjalniar Theel, Report on the Holothuroidea, dredged by 

 the " Blake." Bull. Mus. Comp. Zool. Vol. xiii, p. 1. Re- 

 port upon species collected in the West Indian region. 



1887. H. F. Nachtrieb. Notes on Echinoderms obtained at Beau- 

 fort, N. C. Johns Hopkins University. Studies from the 

 Biological Laboratory, Vol. iv, p. 81. 



1888. Angelo Heilprin. Contributions to the Natural History of 

 the Bermuda Islands. Proo. Acad. Nat. Sci. Phila. p. 309. 



1889. W. Percy Sladen. Report on the Asteroidea collected by 

 H. M. S. Challenger during the years 1873-1876. Includes 

 faunal list and description of West Indian species. 



Explanation of Plate VIII. 



Fig. 1. Holothuria Heilprini, side view, natural size. Drawn 



from the contracted alcoholic specimen. 

 Fig. 2. Perfect table viewed from the side, above and below. 

 Fig. 3. Imperfect table from around the disks of the pedicels, 



viewed from the side. 

 Fig. 4. Rib-like rods of the papillse. 

 Fig. 5. Two segments of calcareous ring. 

 Fig. 6. Rosettes. 

 Fig. 7. Holothuria Silamensis. Two segments of the calcareous 



ring. 

 Fig. 8. Rib-like rods of the papillae. 

 Fig. 9. Rosettes. 

 Fig. 10. Holothuria nitida. Perfect table, viewed from the side, 



above and below. 

 Fig. 11. One of the imperfect tables occurring around the disk of 



the pedicels, viewed from the side. 

 Fig. 12. Rib-like rod from the papillse. 

 Fig. 13. Two segments of the calcareous ring. 

 Fig. 14. Small common rosettes. 

 Fig. 15. Larger uncommon rosettes. 

 Fig. 16. Echinaster Brasiliensis natural size, dorsal surface. 



