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RADIATA. 



No. 932. Ichthyocrinus laevis, Conrad. 



This interesting fossil, related to Cycathocrimis, lias five triangular basal 

 plates, and a round, smooth, slender column, enlarging towards the cup. The 

 body has an undeveloped tripetaloid base. This specimen, showing body and 

 stem, is from the Niagara shale (Upper Silurian), Lockport, N. Y. Price, $0.40. 



No.' 933. Ichthyocriims lsevis ? Conrad. 



Body and arms ; same locality. Price, $0.40. 



No 934. Lecanocrinus macropetalus, Hall. 



This Crinoid differs chiefly from Ichthyocrinus in having three basal plates 

 instead of five. It may be a farther development of the type first appearing in 

 Ichthyocrinus. From the Niagara shale (Upper Silurian), Lockport, N. Y. 



Price, $0.20. 

 No. 935. Lampterocriirus Tennesseensis, Roemer. 



This fossil, the Balaaocriaus sculptm of Troost, unites the pear-shaped body 

 of Apiocrinus with the stem of Pentacriiius. From the Niagara limestone (Up- 

 per Silurian), Decatur County, Tennessee. Price, $0.25. 



No. 936. Lepadocrinus (Apiocystites ) G-ebhardi, Conrad. 



This Cystidean has an oblong, oval body, compressed at the 

 sides, four unequal basal plates, four arms, and a column of two 

 distinct parts, — the upper being flexible, the lower, larger, long- 

 er, and inflexible. This specimen, showing the body, with a short 

 stem, is from the Lower Helderberg (Upper Silurian), Schoharie 

 County, N. Y. Price, $0.25. 



No. 937. Lyriocrinus ( Rhodocrirms) dactyhis, Hall. 



Body and arms. This species, allied to Cyathocrinus, has five pentagonal 

 basal plates, five sub-radials, and five basals. The column is round, composed at 

 the top of alternating larger and smaller joints. From the Niagara shale (Upper 

 Silurian), Lockport, N. Y. Price, $0.30. 



No. 938. Mariacriims nobilissimus, Hall. 



This species, constituting the type of this genus, is one of the largest and 

 finest known Crinoids in the Silurian system. It bears a general resemblance to 

 Glyptocrinus ; but it has four basal plates, three pentagonal and one hexagonal 

 The column is round, consisting of joints, gradually growing thinner towards 

 the body. A remarkable feature is that the main arms give origin to armlets or 

 fingers which bear the tentacles. This magnificent specimen of a nearly entire 

 individual is from the Lower Helderberg (Upper Silurian), Litchfield, N. Y. 



Price, $0,75. 

 No. 939. MegistOCriims Knappi, Lyon and Cass. 



A sub-genus of Actinocrinus. The body is large, broadly spreading, with de- 

 pressed dome; the column is round, with unequal joints. From the Upper Hel- 

 derberg (Devonian), Falls of Ohio. Price, $0.30. 



No. 940. Megistocrirms Ontario, Hall. 



Body and branching arms. From the Hamilton shales (Devonian), Western 

 New York. Price, $0.50 



