2 JURASSIC RHYNCHONELLIDS 
at Qe 
2-4 
ia ak 
/ \ 
/ ~ 
\ 
\ { 
\ ? Ke / 
\ / 
\ Be 
cova 8 2-8 
alg — SX je i N Y ia 
: 
es 4 eda ee 
a Sr ee ee oa he) ae Se eel 
Fic. 26. top. Transverse serial sections of A. (Echinirhynchia) senticosa (Schlotheim). ‘‘ Malm 
delta ’’. Heiligenstadt, Germany. Specimen donated by the University of Erlangen. (x 8). 
BOTTOM. ‘Transverse serial sections of A. (Acanthorhynchia) vilsensis sp. nov. Topotype. 
Callovian. Legam bei Vils in the Tirol. Specimen donated by the Bayerische Staatsamm- 
lung. (x8). 
