402 PROCEEDINGS OF THE ACADEMY OP [1881. 



A. Wkitfieldi Hall, syn. of Periechoer. Christyi. 

 A. Yandelli Shumard, see Batocr. Yandelli. 



Agariooorinus Troost. 



A. bellatrema Hall, syn. of Agaricocr. ornatrema. 



A. bullatus Hall, syn. of Agaricocr. americanus. 



A. corrugatus Hall, syn. of Agaricocr. pyramidatus. 



A. excavatus Hall, syn. of Agaricocr. americanus. 



A. nodosus Meek and Worth., syn. of Agaricocr. americanus, 



A. pentagonus var. convezus, see Agaricocr. convexus. 



A. iuberosus Troost., syn. of Agaricocr. americanus. 



Alloprosallocrinus Lyon and Casseday. 



A. depressus Lyon and Cass. Not sufficiently defined. 

 A. euconus Meek and Worth., see Batocr. euconus. 



Amblacrinus d'Orbigny. Not sufficiently defined. 



A. rosaceus (Roemer) d'Orbigny, see Coccocr. rosaceus. 



Amphoracrinus Austin. 



A. americanus Roemer, see Agaricocr. americanus. 



A. bellatrema Hall, syn. of Agaricocr. ornotrema. 



A. concavus (Actinocr.) Meek and Worth., see Dorycr. concavus. 



A. corrugatus Hall, syn. of Agaricocr. pyramidatus. 



A. crassus Austin. Insufficiently defined. 



A. excavatus Hall, syn. of Agaricocr. americanus. 



A. granulatus Austin. Not sufficiently defined. 



A. inflatus Meek and Worth. (Hall's Actinocr. inflatus, 1860), syn. of 



Amphoracr. spinobrachiatus. 

 A. inflatus (Hall's Agaricocr, — Amphoracr. — inflatus, 1861), see Agaricocr. 



inflatus. 

 A. ornotrema Hall, see Agaricocr. ornotrema. 



A. planobasilis Hall (Meek and Worth.), syn. oi Amphoracr. divergens. 

 A. planoconvexus Hall, Agaricocr, planoconvexus. 



A. quadrispinus'White (Meek and Worth.), syn. of Amphoracr. spinobrachiatus. 

 A. sublurbinatus Meek and Worth., syn. of Dorycr. parvus. 



Aspidocrinus Hall. The root (?) of a crinoid. 

 A. callosus Hall. Body unknown. 

 A. digitatus Hall. Body unknown. 

 A. scutelliformis Hall. Body unknown. 



Asteroorinus Lyon (not Miinster), syn. of Pterotocrinus. 

 A. capitalis Lyon, see Pterotocr. capitalis. 

 A. coronatus Lyon, see Pterotocr. coronatus. 



Astrocrinites Conrad (not Cumberland nor Austin), syn. of Melocrinus. 

 A. pachydactylus Hall, see Melocr. pachydactylus. 



