Wachsmuth and cl gill auras Crinoids. 268 
ike margins, which were before obscured by the matrix. He 
also figures the flattened specimen referred to in his letter, but 
not —— in the Canada Reports. 
* Reteocrinus Billings. 
Fig. 1. Billings’s type specimen (Geol. Rep. Can., Dec. AN Pl. 9, fig. 4a). Fig. 2. 
Section A-B, to show depression of margins of plates. Fig. 3. Specimen in G. S. 
€. collection not pede before. All from drawings by Walter R. Billings. 
We think that with these figures, and the notes above 
quoted, the pitas of we generic identity of GU. A ees ad 
allied forms with Reteocrinus, may be considered a 
By following the strict Teese of the rules of plant ine: 
we might have been justified in setting aside Billings’ genus 
entirely, and re-describing the type under a new name, for the 
reason that the leading characters ascribed to it as generic, do 
not in fact exist in his own species or elsewhere. This has 
such forms as are paealy Sais with pr species first 
described, than to deprive him, by a technical adhesion 
a strict rule, of all credit for his work, and burden science 
