REFERENCE TO PLATES. 



(FOR PLATES 16 See p. SO.) 



TRICHOTROPIDXE. 



PLATE 7. 

 FIGURE, PAGE, 



37. Trichotropis borealis. Dentition. Fischer's Manual f. 



457, . .40 



38. Trichotropis borealis. Operculum. Ibid. f. 458, . . 40 



39. Gyrotropis squamosa, Gabb. Proc. Philad. Acad: t. 17, 



f. 5, 1876, . . ; 41 



40 Seguenzia formosa, Dentition. Trans. Conn. Acad. vi, t. 



31, f. 14b 41 



41. Seguenzia formosa. Operculum. Trans. Conn. Acad. vi, 



t. 31, f. 14 a. . . 41 



42. Trichotropis bicarinata, Brod. & Sowb. Conch. Icon. f. 2, 42 



43. Trichotropis tenuis, Smith (= bicarinata). Ann. Mag. 



N. Hist. 4 Ser. xx, 136, 1877, 42 



44. Trichotropis quadricarinata, A. Ad. (= borealis). Reeve, 



Conch. Icon. f. 9, . . . 



45. Trichotropis conica, Moll. (= borealis). Ibid. f. 12, . 43 



46. 47. Trichotropis borealis, Brod. & Sowb. Ibid. f. 1, . 42 

 47a. Trichotropis borealis, Brod. & Sowb. Forbes & Hanley, 



Brit. Moll. t. ii, f. 1, 42 



48. Trichotropis costellata, Couth. (= borealis). Conch. 



Icon. f. 13, . . 4a 



49 Trichotropis cancellata, Hinds. Ibid. f. 3, 



50. Trichotropis flavida, Hinds (= cancellata). Ibid. f. 6, 43 



51. Trichotropis clathrata, A. Ad. Ibid. f. 10, . . 43 



52. Trichotropis inermis, Hinds (= borealis). Ibid. f. 11, . 43. 



53. Trichotropis coronata, Gould. Archiv fiir Naturg. li, t. 



16, f. 4,a . . . . 43- 



54. Trichotropis coronata, Gould. Aurvillius, Arct. Hafsmoll. 



t. 12, f. 15, 43 



55. Trichotropis cedonulli, A. Ad. Conch. Icon. f. 7 b. . 44 



56. Trichotropis unicarnata, Brod. & Sowb. Ibid. f. 8, . 44 



57. Trichotropis fimbriata, Jeffreys. Proc. Zool. Soc. t. 5, f. 



7, 1885, . 44 



58. Trichotropis densistriata, Jeffreys. Ibid. t. 5, f. 8, 1885, 44 



59. Trichotropis insignis, Midd. (= borealis). Aurivillius, 



Arct. Hafsmoll. t. 12, f. 17, . . 4a 



PLATE 8. 



60. Trichotropis Kroyeri, Phil. Aurivillius, Arct. Hafsmoll. 



t. 12, f. 13, 44 



(438) 



