PLATE 19 



Pseudovermiporella 



Figs. 1-5. Pseudovermiporella sodalica Elliott. Thin-sections, X50. 1, 2. Portions of 

 large individuals showing typical coarse mesh of main tube, supposed diagenetic lining layers, 

 inner tube and irregular meandriform growth ; in fig. 2 mesh of a second small individual is 

 seen in position of growth on the inner tube of the main individual. V. 41641, V. 41645, 

 3. Transverse cut of typical single unattached tube. V. 41644. 4, 5. Sections of small early 

 clusters or " nucleo-conch " structures ; in fig. 4 the reniform, calcite-filled structure is 

 unusually large but is apparently an early inner tube. 41649, 41642. Permian; Jebel Qamar, 

 Peninsular Oman, Arabia. 



