- Simroth (Ergeb.
- No stalk .1 has been seen by Simroth or Fritz Muller, but in other respects the larva r 2 resembles the stages in the development of Megathyris p and Terebratulina which immediately precede fixation.
- (From Simroth.) not develop into a pseudoI, Protegulum; 2, permanent shell.
- (24) Simroth, " Mollusca," Bronn's Klassen and Ordnungen des Thierreichs, Bd.