256 THE CLASSIFICATION 



Description of figs. 151 to 168, on pages 257 to 261 : 



VERTRURATA. 



Fig. 151. See p. 118, fig. 51, lor the description of the lettering. 



Fig. 152. Dendroica virens. Baird. Black-throated green warbler. \ nat- 

 ural size. From Audubon. 



Fig. 153. Scleroporus consobrinus. B. and G. Natural size. A lizard, 

 from our southwestern territory. From Baird Girard. 



Fig. 154. Argyreus atronasus. Heck. Natural size. The common brook 

 minnow, From Storer. 



MOLLUS-CA. 



Fig. 155. Loligopsis illecebrosa. f natural size. The common squid of this 

 coast. For the description see p. 206, fig. 124. 



Fig. 156. Helix albolabris. The common snail. 2 diam. For the descrip- 

 tion see p. 203, fig. 122. 



Fig. 157. Oslrea Virginica. L. The common oyster. For the description 

 see p. 200, fig. 121. 



Fig. 158. Fredericella reqina. Leidy, MSS. One of the fresh-water Bryozoa. 

 For the description see p. 198, fig. 120. 



ARTICULATA. 



Fig. 159. Sphinx Ligustri. L. Natural size. The haiok privet-moth. For 

 the description of the lettering see p. 119, fig. 53. 



Fig. 160. Epeira trifolium. Hentz. Natural size. A common garden 

 spider. For description of lettering see p. 220, fig. 129. 



Fig. 161. Cyclops quadricornis. 50 diam. A minute, shrimp-like Crustacean. 

 For description see p. 220, fig. 128. 



Fig. 162. Myrianida fasciata. M. Edw. 2 diam. A marine worm. For 

 the description of the lettering see p. 80, fig. 43. 



ZOOPHYTA. 



Fig. 163. Psolus phantapus. Strfldt. ^ natural size. A trepang from this 

 coast. For description of lettering see p. 192, fig. 117. 



Fig. 164. Tubularia indivisa. L. Natural size. A Hydroid Acaleph from 

 Boston harbor. For description see p. 238, fig. 136. 



Fig. 165. Metridium marginalum. M. Edw. natural size. A Polyp from 

 Boston harbor. For description see p. 57, fig. 28. 



PROTOZOA. 



Fig. 166. Epistylis jfavicans. Ehr. 250 diam. One of the highest of the 

 group of Ciliala. For description see p. 161, fig. 95. 



Fig. 167. Podophrya Cyclopum. Clap. 300-350 diam. A pedicellate in- 

 fusorian belonging to the group Suctoria. For description see p. 51, fig. 25. 



Fig. 168. Amceba diffluens. Ehr. 100 diam. An Amoeba or Protean ani- 

 malcule, belonging to the group of Rhizopoda. For description see p. 9, fig. 1. 



