EXPLANATION OF PLATES. 



Plate XVI IL 



]5escriptios of Figures. 



Fig. Page 



2-t. Vemeuilina polystropha ^Keuss). Abnormal tank-grown twinned 



specimens, joined month to apex, ...... 176 



(For figs. 25. 26, see Plate XV IL) 

 27. Vemeuilina polystropha (Reuss). Abnormal tank-grown twinned 



specimens, joined apex to apex, ... . . 176 



28. 

 29. 

 30. 

 3L 

 32. 

 33. 



1 Vemeuilina poli/stropfui (Reiiss). Tank-giown specimen-s, exhibit- 

 ing various abnormalities in growth 176 



34^ I VemeuUina pofi/stro/Jia (Reuss). Normal specimens from shore- 

 ■> sand, Selsey Bill, Sussex. Li;;ht colour due to absence of 

 ( ferruginous cement, 171 



(For. fig. 36 ft seq., see Plate XVI.) 



45. i/asnlina gecans (d'Orh.). Abnormal tank-grown chitinous speci- 

 men, with calcareous terminal chamber, .... 176 



46. y 



,- I Textulana luculcnta, Brady. Abnormal local variation from River 



i ■ ■ ■ 



Min, China. Incorpoi-ating large mineral fragments, . 176 



