248 REFERENCE TO PLATES. 
PLATE 47, 
FIGURE, 
18, 19. Oscanius hilli Hedley. P.L.S. N.S. W., 
20, 21. Pleurobranchus tessellatus Pse. Am. oneal Conch., 
29, 23. Pleurobranchus ornatus Cheesem. P. Z.S., 
PLATE 48. 
24-28. Pleurobranchus peronii Cuy. Voy. Astrol., 
29-31. Pleurobranchus citrinus Riipp. After Riippell, - 
32, 338. Oscanius forskali (marinus). After Riippell, . 
34, 35. Gymnotoplax scutatus(—martensi). After Mobius, 
PLATE 49. 
36-38. Oscanius reticulatus Rang. Mag. de Zool., 
39-41. Pleurobranchus oblongus Aud. sees Savieny, 
42. Oscanius blainvillei Less. Cent. Zool., 
PLATE 50. 
43, 46. Oscanius testudinarius Cantr. After Philippi, . 
44, 45. Oscanius testudinarius Cantr. After Vavssieére, . 
47, 48. Tylodina americana Dall. Blake Rep., 
Prare 5: 
50, 51. Oscanius tuberculatus Meckel. After Vayssiere, . 
52, 538. Oscanius tuberculatus Meckel. After Forbes & Han- 
OAR 
LOY, ii, RR aaa OE) Se ae 
54, 55. Oscanius tuberculatus var. dehaani Cantraine. 
Cantraine, . . 
56, 57. Oscanius faberouleriet Meckel, : 
58. Hyalopatina rushii Dall, from drawing of ty pe, - 
PEArE yo: 
60, 61, 64, 65. Pleurobranchus ge Mont. Forbes & 
. 198 
. 194 
Hanley, #: 
62, 63. Pleurobranchus stellatus Risso. After Vayssicre, . 
66-68. Pleurobranchus monterosatoi Vayssiére. After V ay s- 
selere, 
69-72. Pleurobranchus brevifrons Phil. “After Philippi, : 
73-75. Pleurobranchus perforatus Phil. After Philippi, . 
76, 77. Pleurobranchus aurantiacus Risso. After Cantraine, 
78. Pleurobranchus aurantiacus Risso. After Philippi, . 
79, 80. Pleurobranchus aurantiacus Risso. After Vayssiére, . 
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