31 Olsson, Devonian Fossils 5 



Interradials 1, 2, 3, 3. First (1st) interradial hexagonal, 

 slightly higher than wide, second (2nd) interradial irregularly 

 hexagonal, as are the remainder of the interradials. Plates of 

 the ventral surface small, apparently of an irregular hexagonal 

 shape. 



Anal tubes long and composed of several small irregular 

 plates. 



Remarks : 



This species is remarkable in its possession of the strongly 

 spiniferous character of its plates. In this respect the species 

 approaches Melocrinns gregeri* Rowley from the Hamilton of 

 Missouri, which however has the spiniferous nodes, confined 

 only to the larger plates of the dorsal cup, as well as lacking the 

 ridge-like elevations extending through the radials and brachials 

 and the circle of bead-like elevations around the spiniferous cen- 

 ters of the radials and first (1st) interradials. 



Observation : 



This specimen is from the Portage rocks near Cortland, N. Y. 



Melocrinus reticularis, n. sp. Plate 7, Fig. 1. 



Shape pyriform spreading rapidly from the narrow base. 

 Basals strongly tumid only two shown on the specimen, anterior 

 one hexagonal, the other pentagonal in shape. Radials (three 

 shown) anterior one resting upon the hexagonal base, hexago- 

 nal in shape, the other two heptagonal, about as wide as high. 

 First (1st) costal slightly longer than wide and hexagonal in 

 shape. The second (2nd) costal axillary and heptagonal in 

 shape, supporting upon its two upper sloping sides the distichals. 

 Distichals 2x10 and incorporated in the dorsal cup. Their shape 

 is not easily discernible because their sutures are indistinct. 



Arms biserial (one arm is shown lying on its side embedded 

 in the rock) ; armlets appear to be given off from each third (3d) 

 brachial plate. 



*American. Geologist., 1893, vol. 12, p. 303-304, fig. 1. In this paper 

 Rowley describes several species of Crinoids from the Devonian and Sub 

 Carboniferous rocks of Missouri ; amongst these Melocrinus gregeri 

 which appears to have been later described by Wachsmuth and Springer 

 under the name of Melocrinus Calvini W+S. (Mem. Mus. Comp. Zool., 

 vol. 21, p. 300, pi. 22, fig. 6. 1897.) 



