250 REFERENCE TO PLATES. 
FIGURE, 
37, 38. Tethys elongata Pse. Pilsbry, del., 
39. Tethys venosa Hutt. Tr. N. Z. Inst., . 
40, 41. Tethys tigrina Rang. After Rang. . 
42, 43. Tethys norfolkensisSowb. Conch. Icon., 
44. Tethys brunnea Hutt. Tr. N. Z. Inst., 
PLATE 60. 
45-48. Tethys panamensis Pils. Pilsbry, del., . 
49-52. Tethys maculata Rang. After Rang,. . . 
53. Tethys argus Rupp. & Leuck. After Rtppell, . 
PLATE 61. 
54. Tethys euchlora Ads. Figs. Moll. Anim., 
55. Tethys ocellatus (=adamsi). Figs. Moll. ’Anim., 
56-58. Notarchus gelatinosa=indicus Schw. After Rang, . ; 
59. Notarchus (Bursatella) leachii Blv. After Blainv., 
60. Actzon browniJordan. Proc. Mal. Soc.i, . 
PLATE 62. 
1. Notarchus plei Rang, genitalia. E.G. Vanatta, del., 
2. Notarchus plei Rang, penis. E.G. Vanatta, del., 
3. Tethys, “annexed genital mass.” After Mazzarelli,. . 
4, Notarchus plei Rang, digestive tract. E.G. Vanatta, del. 
5-8. Dolabrifera hollbdlli Bergh. After Bergh, . 
PLATE 63. 
9-11. Dolabella teremidi Rang. After Rang, . 
12-16. Dolabrifera nicaraguana Pils. Pilsbry, del., 
PLATE 64. 
2. Dolabella guayaquilensis Sowb. Conch. Icon., 
3. Dolabella hasselti (type) Fér. After Rang, . 
PLATE 65. 
4-6. Dolabella gigas Rang. Ross, del.,. . 
7, 8. Dolabrifera triangularis Wats. Chall. Rep. 
9. Dolabrifera hollbélli Bgh. After Bergh,. . . 
10, 11. Dolabrifera ascifera Rang. After “Bergh, ; 
