ECHINODERMATA. 



179 



No. 941. Nucleocrinus Verneuili, Troost. 



Tliis Blastoidean has an ovoid body, supported by a slender column, three 

 minute basal plates, five radials, and six inter-radials. From the Upper Helder- 

 berg (Devonian), Falls of Ohio. Price, $0.20. 



No. 942. Pentacrinus subangularis, Miller. 



Body and stem, on slab. (Syn. P.faseiculosus, Schloth.) In 

 the Pentacrinoids, the body-plates are firmly articulated together; 

 the rays of the disc are fixed immediately to the summit of 

 the column by special ossicles ; and the stem is composed of 

 angular pieces, generally pentagonal. The arms are very long, 

 and thickly beset with side-arms and minute pinnae. This speci- 

 men, of unusual size and perfection, is from the Lias, Boll, Wir- 

 temberg. Size, 4 ft. 5 in. x 1 ft. 6 in. Price, $4.50. 



No. 943. Pentacrinus subangularis, Miller. 



Body and stem, on slab. From the Lias, Boll, Wirtemberg, and is now in 

 the Ward Museum, University of Rochester. Size, 13 x 12. Price $1.75. 



No. 944. Pentacrinus basaltiformis, Miller. 



A slab covered with numerous segments of stems. These various segments 

 of the stem of a typical species show well the pentagonal form of the stem and 

 the star-like radiation of the inner structure displayed on the free ends. 



Price, $0.75. 



No. 945. Pentacrinus ( Estracrinus ) Briareus, Miller. 



The Extracrinoids of Aus 

 tin are Pentacrinoids with un- 

 equal radial plates. This slab, 

 containing a multitude of beau- 

 tifully preserved bodies, is from 

 the Lias of Whitby, England, 

 and is now in the Ward Mu- 

 seum, University of Rochester. 

 Size, 2 ft. 2 in. x 1 ft. 10 in. 



Price, $7.00. 



No. 946. Pentacrinus colligatus, 



Two heads on slab, each over two feet in diameter ! From the Coral Rag 

 (Middle Oolite), Streitberg, Germany. Size, 4 ft. x 3 ft. 4 in. Price, $8.00. 



