EXPLANATION OF PLATE XXX. 



Figure 217.— Tagelus gibbus, (p. 675;) natural size. 

 218. — Tegelus divisus, (p. 676 ;) natural size. 

 219. — Callista convexa, (p. 681 ;) natural size. 

 220. — Tottenia gemma, (p. 682;) enlarged. 

 221. — Cumingia tellinoides, (p. 679;) natural size. 

 222. — Macoma fragilis, var. fusca, (p. 676;) natural size. 

 223. — Angulus tener, (p. 677 ;) natural size. 

 224. — Angulus tenellus, (p. 677;) natural size. 

 225. — Tellina tenta, (p. 678;) natural size. 

 226. — Kellia planulata, (p. 688 ;) enlarged. 

 227. — Argina pexata, (p. 692 ;) natural size. 

 228. — Scapharca transversa, (p. 691 ;) natural size. 

 229. — Nucula delpbinodonta, (p. 691 ;) enlarged. 

 230. — Nucula proxima, (p. 691 ;) natural size. 

 231. — Yoldia sapotilla, (p. 689;) natural size. 

 232. — Yoldia limatula, (p. 689 ;) natural size. 



(Figure 224 was drawn by A. E. Verrill ; tlie rest are from Binney's Gould, by E. S. Morse.) 



