19G BULLETIN 37, UNITED STATES NATIONAL MUSEUM. 



PLATE LV. 



Fig. 1. Tellina tenera Say, showing extended animal. 



2. Ml/a arenaria Linn6, showing extended animal. 



3. Tagelus gibhus Spengler, showing extended animal. 



4. Ensis americanus Gould, showing extended animal. 



5. The same, terminal siphonal papillse. 



6. Teredo navalis Liun6, removed from hurrow, showing external soft parts, 



shell, and pallets. 



7. Venus mercenaria Linn6, showing extended animal. 



These figures were loaned by the U. S. Fish Commission. They first appeared in 

 the first Annual Report of the Commission in Prof. A. E. Verrill's report on the 

 invertebrate animals of Vineyard Sound, and were drawn from life by Professor 

 Verrill. 



PLATE LVI. 



Fig. 1. Yoldia Umatula Say. 



2. Area transversa Say. 



3. Tagelus gibbus Spengler. 



4. Nuculaiyroxima ^aj. 



5. Tagelus divisus Spengler. 



6. Macoma baUica Linn6, var. /used Adams. 



7. Kellia jjlanulata Stimpson, enlarged about twice uat. size. 



8. Nucula del])hinodouta Migbels, enlarged to about twice nat. size. 



9. Yoldia sajyotilla Gould. 



10. Macoma tenia Say, typical form. 



11. Gemma purpurea H. C. Lea {G. gemma Totten), identified from Lea's type, 



12. Tellina tenella Verrill. 



13. Tellina tenera Say. 



14. Cumingia telUnoides Conrad. 



15. Cytherea convcxa Say. 



16. Area (Argiiia) pexata Say. 



For remarks see note under Plate L. Fig. 12 was drawn by Prof. A. E. Verrill. 



PLATE LVII. 



Fig. 1. Cyprina islandica Linn6. 



2. Mactra solidissima Dillwyn. 

 For remarks see note under Plate L. 



PLATE LVIII. 



Fig. 1. Astarte undata Gould. 



2. Cryptodon GouldiiVhilip^'i. 



3. Solenomya velum Say. 



4. Astarte quadrans Gould, Long Island Souud northward to Nova Scotia. 



5. Cardium pinnulatum Conrad. 



6. Divaricella dentata Wood. 



7. Astarte castanea Say. 



8. Liocardium Mortoni Conrad, showing extended animal. 



9. Venericardia borealis Conrad, typical form. 



10. Venericardia borealis var. novanglice Morse. 



11. Eriphyla lunulafa Conrad, enlarged. 



12. Cryptodon obesus Verrill, greatly enlarged. 



13. Eriphyla lunulata Courad, natural size. 



14. Lucina filosa Stimpson. 



See Plate L for remarks. Figures 1, 11, and 12 were drawn by Prof. A. E. Verrill- 



