THE DEVELOPMENT OF SCAPHITES 



645 



Fig. 3. — 1, First five sutures of 5. nodosus var. brevis; X30. 2, Suture at 

 2.26 mm ; X30. 3, Suture at 4 mm ; Xio. 4, Suture of 5. nodosus var. plenus at 3 mm ; 

 2§ whorls; X30. 5, Side view of 5. nodosus brevis showing sutures i.76 mm ; 2f 

 whorls 20 D. 6, Adult suture of S. nodosus brevis; 28 mm ; natural size. 7, S. 

 nodosus plenus at 6 mm ; X7. 8, End view of same. 9, S. nodosus brevis at 5 mra ; 

 Xio. 10, S. nodosus plenus adult; natural size. 11, S. mullananus adult; X3. 

 12, S. condoiii and adult; X5. 13, First six sutures of Gly phioceras diadema (Branco). 

 14 — Internal suture of S. nodosus at same size as that shown in Number 9. 



