438 II. W. Shirner — Post- Glacial History of Boston. 



1. Plants (unrecognizable frag- 



ments) 



FORAMINIFERA* 



2. Polystomella striatopunctata 



3. P. sp. 



4. Trochammina inflata 



Sponges 



5. Cliona sulphurea 



Bryozoa 



6. Membranipora pilosa 



Pelecypoda 



7. Yoldia limatula 



8. Ostrea virginica 



9. Pecten gibbus borealis 



10. Pecten magellanicus 



11. Anoraia simplex 



12. Mytilus edulis 



13. Modiolus modiolus 



14. Modiolus demissus var. plica- 



tulus 



15. Clidiophora trilineata 



16. Arctica islandica 



17. Cyclocardia borealis 



18. Astarte undata 



19. Astarte elliptica 



20. Lucina filosa 



21. Kellia planulata 



22. Laevicardium mortoni 



23. Venus mercenaria 



24. Gemma gemma 



25. Petricola pholadiformis 



26. Macoma balthica 



27. Tagelus gibbus 



28. Ensis directus 



29. Angulus tener 



30. Mactra solidissima 



31. Mulinia lateralis 



32. Myaarenaria 



Gastropods 



33. Acmaea testudinalis 



34. A. testudinalis var. alveus 



35. Vitrinella shimeri Clapp 



36. Turbonilla winkleyi 



37. Odostomia trifida 



38. Odostomia fusca 



39. O. bisuturalis 



40. Littorina rudis 



41. L. rudis tenebrosa 



42. Littorina palliata 



43. Littorina littoreaf 



44. Lacuna vincta 



45. Crepidula fornicata 



46. Crepidula plana 



47. Crepidula convexa 



48. Polinices heros 



49. Polinices triseriata 



50. Neverita duplicata 



51. Paludestrina minuta 



52. Bittium alternatum 



53. Triforis nigrocinctus 



54. Columbella lunata 



55. Cingula carinata 



56. Buccinum undatum 



57. Nassa trivittata 



58. Ilyanassa obsoleta 



59. Urosalpinx cinereus 



60. Thais lapillus 



61. Anachis avara 



62. Tornatina canaliculata 



63. Melampus lineatus 



Crustacea 



64. A copepod 



65. Balanus balanoides 



66. B. crenatus 



67. B. porcatus 



68. Crab claws 



Vertebrata 



69. Fish 



After an examination of the peat from the subway at Exeter 

 Street, Mr. G-. B. Heed of Harvard University writes: 



* Identified by J. A. Cushman. 



f This species was doubtless inti'oduced into the fossil shells by the dredge, 

 since nowhere else upon the American coast is this shell reported earlier 

 than 1855 (Gulf of St. Lawrence). It is apparently a late migrant from 

 Europe. 



