Nichols on the Scaphiopiis Solilariiis. 113 



76, Solemya velum, Say, 35. 



48. Spirorbis nautiloides, Lam, 8. 



75. Thracia Conradi, Couth., Boston Juurnal of Natur- 

 al History vol. II., p. 153, pi. 4. f. 1, Gould, 50. 



56. Tellina poll ta, Say. This is probably an error. See 

 Gould's Report, p. 69, in note on Tellina tenera. 



56. Tellina tenera, Say, 68. f. 44. 



63. Terebratula caput-serpentis, Lam., 141. 



49. Teredo navalis, Linnmis, 26. 



69. Trichotropis borealis, Sowerby, 300. f. 207. This is 

 the Trichotropris costellatus, Couthouy, as given 

 on p. 69, where dele 2d and 3d lines and substitute. 



71. Turritella erosa, Couth., 267. 



59. Uiiio complanatus, Lea, 107. f. f. 68. 69. 70. Said 



to be peculiar to the fresh waters of the Eastern 

 slope of the Alleghany mountains. 



60. Unto nasutus, Say, 109. f. 71. 

 60. Unio radiatus, Barnes, 110. f. 73. 

 58. Venus gemma, Totten, 88. f. 51. 



58. Venus mercenaria, Linn&us, 85. f. 67. 



66. Velutina laevigata, 241. f. 159. This in the Veluti- 

 na rupicola Conrad, as quoted on p. 66. where 

 dele the query about Oxynoe glabra. 



OCCURRENCE OF SCAPHIOPUS SOLITARIUS, IN ESSEX COUNTY : WITH SOME 

 NOTICES OP ITS HISTORY, HABITS, &c. BY ANDREW NICHOLS, M. M. S. S-, Presi- 

 dent of the Society. Read June 17, 1843. 



In a shallow basin surrounded by ledges of greenstone 

 rock, which retains water during the winter and spring, 

 and is occasionally rilled in summer by great rains to the 

 depth of one to four feet, on the brow of a hill in Danvers, 

 over which the old Essex Turnpike crosses, and near the 

 intersection of this road by the Newburyport Turnpike, an 

 interesting colony of this rare reptile, hitherto unobserved 

 north of South Carolina, has been lately discovered. Some- 



