PLATE 44. 

 Lovenechinus missouriensis (Jackson). Page 337. 



Fig. 1. Burlington Group, Lower Carboniferous, Webb City, Missouri. Mus. Comp. Zool. Coll., 3,136 (from R. T. J. 

 Coll.). Natural size. A moderate sized individual of uncompressed spherical form. There are five columns of 

 plates in each of the five interambulacral areas; orally imperfect impressions of the lantern are in place. 



Fig. 2. Burlington Group, Lower Carboniferous, Coriscana, Missouri. Yale Mus. Coll., 314. Natural size. Internal 

 mold of medium sized specimen. Five columns of plates in each interambulacral area, oculars (not shown in the 

 figure) all insert (p. 344). 



Fig. 3. Burlington Group, Lower Carboniferous, Webb City, Missouri. Mus. Comp. Zool. Coll., 3,125 (from R. T. J. 

 Coll.), paratype. Natural size. Internal siliceous mold, with boundaries of plates marked by more or less elevated 

 ridges and pores by siliceous styles. Five columns of plates in each interambulacrum. In area A, there are two 

 plates in the basicoronal row, three plates in the second row, four plates in the third row, and five plates in the sixth 

 row. A heptagonal plate lies ventrally on the right of the initial plate of column 5 as usual, excepting in area I in 

 which the initial plate of column 5 is tetragonal with two associated heptagonal plates as shown in Plate 43, figs. 1, 2. 

 Drawings, Plate 43, figs. 2, 4, and 5 (pp. 344-346). 



Fig. 4. Same specimen. Natural size. External siliceous mold, with impressions of plates, tubercles, etc. This specimen 

 consisting of an external and an internal mold, presents a condition and perfection of preservation of parts that are 

 unique in Palaeozoic Echini. Drawings, made from wax casts of this external mold, Plate 43, figs. 1 and 3, are 

 compared directly with those made from the internal mold, Plate 43, figs. 2 and 4. The specimen is therefore 

 drawn as if viewed in optical section for comparison of internal and external characters (p. 345). 



Fig. 5. Same horizon and locality. Mus. Comp. Zool. Coll., 3,128 (from R. T. J. Coll.). Natural size. External siliceous 

 mold, with outlines of plates and tubercles as impressions (p. 346). 



Lovenechinus septies sp. nov. Page 348. 



Fig. 6. Warsaw Group, Lower Carboniferous, Boonville, Missouri. F. Springer Coll., 8,115 (from G. Hambach Coll.), 

 holotype. Enlarged, X 1.5. An exceptionally perfect specimen for the Palaeozoic, ventral view. The inter- 

 ambulacral columns as introduced by pentagonal plates with associated heptagonal plates, are marked on the speci- 

 men in ink. 



Fig. 7. Same specimen enlarged, X 1.5. Dorsal view. Drawings of this specimen, Plate 45, figs. 1-6. 



