PLATE LXXVI. 



Fig. 1. Vhyllockras BvviG^i¥,\ii, d'Orbi^nj/. Side view, natural size. Belfast Museum. 



2. — — — Siphonal area, natural size. 



3. — — — Suture-line magnified. 



4. Lytoceras torulosum, Schiihler. Fragment, natural size. My collection. 



5. — — — Siphonal area showing shell and striae. 



do. do. 



6. — HiRciNUM, Schlofheim. Showing striae and fimbriae, natural size. 



My collection. 



