These references are, in so far as possible, to works in the English lan- 

 guage wherein one may find a more elaborate desci-iption than is possible in this 

 little book. Theynsnally refer to the best publislied drawings, or figures, of the 

 several species. As a mle, the following references relate to species only. Refer- 

 ences to literature concerning families and orders will be foiuid thi'oughout the text. 



JELLYFISHES AND HYDROIDS. 



Portugese ilan-of-War (Physalia arethusa) — Agassiz, L., Contributions to Nat. Hist. 



of the U. S., Vol. IV, PI. 35. Haeckel E., Siphouophone of the Challenger 



Expedition, Challenger Reports, Zoologj', Vol. XXVIII. 

 Porpita linnaeana — Agassiz, A., Memoirs Museum Comparative Zoology, Harvard, 



VoL VIII, No. 2. 

 Velella mutica — Agassiz, A., Memoirs iluseum Comparative Zoology, Harvard, 



Vol. VIII, No. 2. 

 Passion-FIower Hydroid (Thamnocnidia speotabilis) — Agassiz, L., Contributions 



to Nat. Hist, of the IT. S., Vol. IV, PI. 22. 

 Eel-Grass Hydroid (Pennaria tiarella) — Arnold, C. I'., Sea Beach at Ebb Tide, p. 124. 



Hargitt, G. W., American Naturalist, Vol. XXXIV, p. 387, Pis. 1-i. 

 Sea Blubber (Cyanea arctica) — Agassiz, L., Contributions to Nat. Hist, of the U. S., 



Vol. Ill, PI. 3, 5, 10, 1860. Agassiz, E. C. and A., Sea-side Studies, p. 38. 

 Speckled Jellyfish (Dactylometra quinquecirra) — Agassiz and Mayer, BuU. Museum 



Comparative Zoology, Harvard, Vol. XXXII, 1898. 

 Milky Disk (Aurelia flavidula) — Agassiz, E. C. and A., Sea-side Studies, p. 42. 



Arnold, C. F., Sea Beach at Ebb Tide, p. 137. Agassiz, L., Contributions to 



Nat. Hist, of the U. S., Vol. Ill, Pis. 6-llb, Vol. IV, pp. 10, 160. 

 Milky Cross (Staurophora laciniata) — Agassiz, L., Contributions to Nat. His. of 



the U. S. Acalephse North America, Part 1, PL 7, 1849. 

 Thimble Jellyfish (Melicertum campanula) — Agassiz, E.C. andA., Sea-side Studies, 



p. 63. Agassiz, A., North American Acalephae, p. 130. 

 Gonionemus murljachii — Murbach, L., Journal of Morphology, Vol. II, 1895. Yerkes 



and Ayer, American Journal of Physiology, Vol. IX, p. 279. Perkins, H. F., 



Proceedings Academy Natural Science, Phila., Nov., 1902. 

 Sea-Plume Hydroid (Obelia, Eucope) — Agassiz, L., Contributions to Nat. Hist, of the 



U. S., Vol. IV, PL 33. Brooks, W. K., Handbook of Invertebrate Zoology, p. 31. 



