MELOCRINID^. 291 



Horizon and Locality. — Niagara group ; Jefferson Co., Ky. 

 Types in the Knapp collection at the Borden Institute of New Provi- 

 dence, Ind. 



Macrostylocrinus fusibrachiatus Ringueberg. 

 Plate XXIIL Figs. 9 k 10, 



1881. HiNGTJEBERG ; Journ. Cincin. Soc. Nat. Hist., Yol. V., p. 119, Plate 5, Fig. 4. 

 1885. W. and Sp. ; Revision Palseocr., Part III., p. 102. 



Larger than the preceding species, and proportionally broader. Dorsal 

 cup apparently bowl-shaped — the exact form not being ascertainable owing 

 to the crushed condition of the specimen ; interradial spaces depressed ; sec- 

 tion eubpentagonal ; surface of plates covered by numerous small, irregu- 

 larly arranged granules. 



Basals of moderate size, forming together a rapidly spreading pentagonal 

 cup ; the column facet surrounded by a small rim, formed by a row of small, 

 closely arranged nodes. Radials large, wider above than below, subquad- 

 rangular; the upper corners slightly truncate. First costals quadrangular, 

 less than half the size of the radials, nearly twice as wide as long. Second 

 costals smaller than the first, and considerably shorter. Distichals free after 

 the second plate. Arms ten, long, massive, widest in the middle, and taper- 

 ing at both ends. The two fixed distichals are followed by a few much 

 shorter cuneate pieces, and the latter by two rows of short transverse plates, 

 alternately arranged and united by a zigzag suture. Eegular interbrachials 

 fLYQ in three ranges • the first plate large and oblong ; the arrangement of 

 the anal side unknown. Column round ; the edges of the nodal joints sur- 

 rounded by small nodes. 



Horizon and Locality. — Niagara group ; Lockport, N. Y. 



Type in the collection of Dr. E. N. S. Eingueberg. 



RemarTcs. — The specimen illustrated by Fig. 10 differs slightly from the 

 type, being smaller, and having a more elongate cup, less massive arms, 

 and proportionally higher costals. But as it is of the general habitus of 

 this species, we take it to be a young specimen of the same. 



