EXPLANATION OF THE PLATES. 



Plate XXVIII. 



Figure 1. — Argonauta argo Linne, p. 247. From an alcoholic specimen taken off Long 



Island. Side view ; natural size. 

 Figure 1«. — Front view of the shell of the same specimen; natural size. 

 Figure 16. — Side view of the same shell. 

 Figure 2. — Ahralia megalops V., p. 143. Type specimen. Front view of one of tha 



sessile arms ; x 2 diameters. 

 Figure 3. — Pleuropus Hargeri Y., p. 275. Tyj^e specimen. Side view of the shell and 



animal in alcohol; enlarged. 

 Figure 4. — Atlanta Peronii Les., p. 274. Side view of a large but somewhat broken 



specimen ; x 8 diameters. 

 Figure 4a. — The same. Front view ; x 8 diameters. The nucleus is broken. 

 Figure 5. — Heterodoris rohusta V. and E., p. 274. Type specimen. Dorsal view 



natural size. 

 Figure 5a. — The same. Ventral view; natural size. 

 Figure 6. — Doris complanata V. and E., p. 274. Dorsal view of a specimen having 



the gills partially retracted; one-half natural size. 

 Figure 7. — Koonsia ohesa V., p. 274. Dorsal view of a specimen a short time in 



alcohol, but having the dorsal portion of the body much contracted, while the 



gill and reproductive organs are more displayed than usual ; one-half natural size. 

 Figure 8. — Caecum Cooperi Smith. Dorsal view of the extended animal and front 



part of the shell from a living specimen ; enlarged about 12 diameters. 



Plate XXIX. 



Figure 1. — Trophon Lintoni V., p. 176. Type specimen. Front view; x2 diameters. 



Figure 2. — Dolium Bairdii V. and S., p. 253. Front view; natural size. 



Figure 2a. — The same. Part of the odontophore; x 22 diameters. 



Figure 26. — The same. Dorsal \*iew of the partially contracted animal preserved in 



alcohol. 

 Figure 3. — Lunatia levicula V. Front view of one of the largest specimens taken ; 



natural size. 

 Figure 4. — Marginella horealis V., p. 165. Front view of one of the first specimens 



taken, which was dead and somewhat eroded ; x 2 diameters. 

 Figures. — Cithna (?) olivaceaY., p. 185. Front view of the type specimen; x8 



diameters. 

 Figure 6. — Capidus Hungaricus (Linne), p. 269. Dorsal view of the largest specimen; 

 X 1|- diameters. 

 Trans. Conn. Acad., Vol. VI. 37 July, 1884. 



