REPORT OF THE STATE PALEONTOLOGIST I903 



281 



Stem. Near the cup the stem is made up of alternating light and 

 heavy rings, slightly flattened on their radial edges and possessing 

 radially disposed sutures. The basal plates are largest and are trans- 

 versely depressed as if slightly bent outward at their bases or as if 

 impressed with a quadrangular die that left four shallow pits at its 

 four corners. The radials are next in size, their raised areas are 

 nearly circular in outline and about 2mm in diameter; they also 

 show slight traces of lateral impressions similar to those on the 

 basals; the raised areas on these plates and on the basals are so 

 large as to nearly or fully meet at the plate 

 edges midway between the angles. The first 

 brachials are smaller and their raised surface 

 wider than high, this area showing a tendency 

 to become diamond-shaped; the plates of the 

 radii above these brachials are well rounded 

 and smooth save for a single depression shown 

 by the anterior and right anterolateral 

 primaxils. The proximal interbrachials are 

 but little smaller than the basals and their 

 raised areas are more angular in outline and 

 well separated from those of the adjoining 

 plates; each supports two smaller plates and 

 these in turn three others above them; a few 

 smaller plates above the latter lose the smooth 

 rounded subcentral elevations and present but 

 a short, vertical, median ridge. In the pos- 

 terior interradius there is an extra plate im- 

 mediately above the anal which is followed 

 by a vertical row of seven and perhaps more smaller regular 

 hexagonal plates. The anal tube is about 2.3mm ini diameter; rises 

 with a slightly broader base, from a position but little posterior to 

 the center of the oral surface; is bent down just above the ninth 

 hexagonal plate of the anal row; curves slightly to the right and 

 then back to the left and its tip nearly touches the IIBr^ of the 

 anterior R; the last part, 4mm in length, consists of about 10 rows 

 of plates each .4mm long and the row so twisted as to bring a plate 



fur) 



Fig. 6 Analysis of R h a - 

 phanocrinus gemme- 

 us. Three radii and three 

 interradii not shown. 



