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

 guage wherein one may find a more elaborate description than is possible in this 

 little book. They usually refer to the best published drawings, or figures, of the 

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

 ences to literature concerning families and orders will be found throughout the text. 



JELLYFISHES AND HYDROIDS. 



Portugese Man-of- War (Physalia are thusa)— Agassi z, L., Contributions to Nat. Hist, 

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

 Expedition, Challenger Reports, Zoology, Vol. XXVIII. 

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



Vol. VIII, No. 2. 

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



Vol. VIII, No. 2. 

 Passion-flower Hydroid (Thamnocnidia spectabilis)— Agassiz, L., Contributions 



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

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



Hargitt, C. W., American Naturalist, Vol. XXXIV, p. 387, Pis. 1-4. 

 Sea Blubber (Gyanea 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, Bull. 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. Acalephffi North America, Part 1, PI. 7, 1849. 

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



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

 Gonionemus murliachii— IMurbach, L., Journal of Morpholog^^ 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, Exicope)— Agassiz, L., Contributions to Nat. Hist, of the 



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



