EXPLANATION OF THE PLATES. 
PLATE XXVIII. 
Figure 1.—Argonauta argo Linné, p. 247. From an alcoholic specimen taken off Long 
Island. Side view; natural size. 
Figure la.—Front view of the shell of the same specimen; natural size. 
Figure 1b.—Side view of the same shell. ; 
Figure 2.—Abralia megalops V., p. 143. Type specimen. Front view of one of tha 
sessile arms; x 2 diameters. 
Figure 3.—Pleuropus Hargeri V., p. 275. Type specimen. Side view of the shell and 
animal in aleohol; 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; x8 diameters. The nucleus is broken. 
Figure 5.—Heterodoris robusta V. and K., 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 obesa 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.— Cecwm 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.-—Zrophon Lintoni V., p. 176. Type specimen. Front view; x 2 diameters. 
Figure 2.—Doliwm Bairdii V. and 8., p. 253. Front view; natural size. 
Figure 2a4.—The same. Part of the odontophore; x 22 diameters. 
Figure 2b.—The same. Dorsal view 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 borealis V., p. 165. Front view of one of the first specimens 
taken, which was dead and somewhat eroded; x 2 diameters. 
Figure 5.— Cithna (?) olivacea V., p. 185. Front view of the type specimen; x 8 
diameters. 
Figure 6.—Capulus Hungaricus (Linné), p. 269. Dorsal view of the largest specimen ; ‘ 
x 14 diameters. 
TRANS. Conn. ACAD., Vou. VI. 37 JULY, 1884. 
