92 Cincinnati Society of Natural History. 



DESCRIPTIONS OF SOME NEW SPECIES OF FOSSILS, 

 FliOM THE CINCINNATI GEO UP. 



By E. O. Ulrich. 



Incerta Sedes. 



Anomaloides, n. gen. 



The above geueric name is proposed for the reception of certain hol- 

 low, compressed, conical bodies, having much of the form of the rays 

 of the Asteroidea. Upon examination, however, they are found to have 

 no surface which can be called either ventral or dorsal, since they are 

 composed uniforaily of elongated, cylindrical, spine like bodies, which 

 are placed parallel with each other, and perpendicular to the surface. 



The fragments from which this descripMon is taken are in all so pecu- 

 liar, and so different from anything heretofore known, that it Avould be 

 exceedingly difficult, and probably premature for me to attempt to 

 point out the affinities of the genus from the specimens at hand. At 

 present, however, I believe thej^ are to be looked for in the Echinoder- 

 mata. 



Anomaloides reticulatus, n. sp. (Plate IV., figs. 6, Qa and 6b.) 



The thirty-five fragments before me were found on a spot about two 

 feet square, and it may be possible that they all belonged to one indi- 

 vidual, but that seems scarcely probable. They ai'e all hollow, and the 

 envelope is composed of an aggregation of sub-cylindrical or rather 

 club-shaped stems, which are placed parallel with each other, and per- 

 pendicular to the surface; their inner ends are acutely pointed, while 

 that end which shows on 'the exterior surface is rounded, and with a 

 minute pit on the top, for the articulation of two very fine and small 

 spines. The distribution of these club-shaped plates is very regular, 

 being arranged in curved or flexuous transverse, and diagonally inter- 

 secting lines; and on account of their cylindrical form, there are a great 

 number of interstices, which may be referable to pores, analogous to 

 those in the Asteroidea. 



Two of the specimens are compressed, conical in form ; one is two 

 inches in length, and the greatest breadth is three-fourths of an inch ; 

 its two edges run nearly parallel for about one and one-fourth of an inch, 

 from where it tapers rapidly to a point. These specimens may repre- 

 sent rays. Another specimen appears to be part of a disk, and judg- 

 ing from its form it seems possible that it was supplied with three such 

 rays, as those described. Two other fragments were observed, in which 



