520 DR F. A. BATHER. 



Plate V. 



Pleurocystis Rugeri, §§ 444-463. 



Fig. 57. Holotype. Mus. Pract. Geol. 25701. Antanal face. An isolated plate and scattered columnals 

 lie on the matrix. The left-hand margin of the theca is fairly complete, but the upper part of the right-liand 

 margin and the radial plates are not seen. This figure affords clear evidence of the absence of pectinirhomb 

 1-5. Rhomb 10-14 is well shown; but rhomb 11-12 is not preserved (§§ 450-455, 460-462). x 2 diam. 



Fig. 58. Holotype. Mus. Pract. Geol. 7434. Anal face of Salter's figured specimen on left, the 

 reverse of our fig. 57. On the right is the greater part of another individual, and between the two is the 

 margin of a third ; these two also present the anal aspect (§§ 456-458, 460-462). Nat. size. 



Fig. 59. Oxford Univ. Mus. Antanal face, with most of the plates weathered away, exposing the peri- 

 proctals, which appear as depressions because the stereom is more worn away than the matrix filling the 

 sutures. The photograph is from the actual specimen (§§ 449, 450, 457, 460). x 2 diam. 



Pleurocystis anglica, §§ 464-485. 



Fig. 60. Paratype in Riksmuseum, Stockholm ; Jaekel's fig. 6. Antanal face. For the interpretation 

 of the plates, see text-fig. 76. A crack which runs across plate 9 in the specimen appears as a ridge in 

 this squeeze. x 2 diam. 



Fig. 61. Holotype, counterpart iu Mus. Pract. Geol. 25704. Antanal face. For the interpretation of 

 the plates, see text-fig. 78. x 2 diam. 



Fig. 62. Holotype in Riksmuseum, Stockholm ; Jaekel's fig. 6a. Anal face. For the interpretation of 

 the plates, see text-fig. 77. x 2 diam. 



Pleurocystis procera, §§ 486-500. 

 Fig. 63. Holotype, G 144, Mrs Gray's Collection. Antanal face. x 2 diam. 



