PLATE 90. 



ANDROSPYRIDA. 



Diam. Page 



Fig. 1. Nephrospyris paradictyum, n. sp. (vel Paradictyum para- 



doxum), . . . ... .x 250 1102 



The complete shell, seen from the frontal side. 



Fig. 2. Nephrospyris paradictyum, n. sp., . . . x 250 1102 



The incomplete shell, seen from the dorsal side. 



Fig. 3. Nephrospyris paradictyum, n. sp., . . . . x 500 1102 



The sagittal ring, isolated, from the dorsal side ; more enlarged. 



Fig. 4. Nephrospyris paradictyum, n. sp., . . . x 120 1102 



Vertical section through half the shell, exhibiting the thickened margin 

 with the included symbiontes (compare page 1101). 



Fig. 5. Nephrospyris paradictyum, n. sp., . . . x 200 1102 



Oblique marginal view of the shell. 



Fig. 6. Nephrospyris paradictyum, n. sp., . . . . x 250 1102 



Marginal view of a young specimen, with open fissure between the two 

 parallel net-plates. 



Fig. 7. Nephrospyris paradictyum, n. sp., . . . x 250 1102 



The soft body alone, without the skeleton. The bilobed central capsule 

 exhibits a central transverse nucleus, and on each lobe a stratum of 

 oil-globules. The kidney-shaped calymma contains on the margin 

 numerous symbiontes (Xanthellw or Vntficelliiui' ? Compare 

 page 1102). 



Fig. 8. Nephrospyris paradictyum, n. sp., . . . x 500 1102 



Three single unicellular symbiontes (ZooxantheUce f). 



Fig. 9. Nephrospyns renilla, n. sp. (vel Nephrodictyum renilla), . x 250 1101 



The bilobed central capsule is enclosed by the discoidal shell and in the 

 middle constricted by the sagittal ring ; it contains a transverse 

 nucleus. The kidney-shaped calymma contains in the peripheral 

 part numerous symbiontes (Xanihclhi' or Vorticfllina'? Compare 

 page 1101). 



Fig. 10. Nephrospyris renilla, n. sp., . . . . x 250 1101 



A singular abnormality (occurring not rarely), in which the reduced 

 skeleton has nearly disappeared and the sagittal ring alone remained. 

 The kidney-shaped calymma, however, which encloses numerous 

 symbiontes, has preserved the form of the skeleton. The bilobed 

 central capsule is similar to that in figs. 7 and 9, and is encircled 

 by the thickened sagittal ring. 



