1910 AMMONITES SUBCONCAVUS loc 



Comparable Species 



Harpoceras simile ; Blake, 1876, i, 4. 



H. caecilia ; Id. 11, 6. 



H. subconcavum ; Id. viii, 8. 

 And for ref. to various spp. of Pseudolioceras, see S. Buckman, Men., 

 iqo4, p. clviii. 



