PLATE 46. 

 Maccoya gigas (M'Coy). Page 321. 



Figs. 1, 2. Arenaceous shale, Lower Carboniferous, Rahan's Bay, Dunkineely, County Donegal, Ireland. Griffith Collec- 

 tion, Science and Arts Museum, Dublin. Cotype. Natural size. Original of M'Coy's, 1844, Plate 24, fig. 1. 

 In fig. 1, the obverse side, are parts of an ambulacrum and three columns of interambulacral plates. In fig. 2, the 

 reverse side, the plates are flattened back like a hinge on the line of the adraclial suture; in this view parts of two 

 columns of interambulacral plates are in place, with in addition some dissociated plates. Drawing, after Baily, 

 Plate 47, fig. 2. 



Fig. 3. Same horizon, locality, and museum. Cotype. Natural size. Original of M'Coy's, 1844, Plate 44, fig. 4b. Two 

 interambulacral plates. Surface ornamentation very clear. 



Lovenechinus missouriensis (Jackson). Page 337. 



Fig. 4. Upper Burlington Limestone, Lower Carboniferous, Burlington, Iowa. F. Springer Coll., 8,126. Natural size. 

 One of only two specimens of this species known from other than Missouri localities. Ambulacral detail very clear. 

 Five columns of plates in each interambulacral area. Drawings, Plate 42, figs. 1-4 (p. 340). 



Lovenechinus anglicus sp. nov. Page 346. 



Fig. 5. Lower Carboniferous Limestone, Clitheroe, Lancashire. Museum of Practical Geology Coll., London, 6,576, 

 holotype. Natural size. Ambulacrum B represents the right half of its area; ventrally plates are alternately pri- 

 mary and occluded; higher up and for most of the area, the plates are alternately demi- and occluded. Ambulacrum 

 D represents ventrally a fragment of the left half of its area, and farther dorsally the whole width of the area some- 

 what imperfectly. Interambulacral plates are very large, but relatively thin. For further description see drawings, 

 Plate 47, figs. 3-5. 



Fig. 6. The same specimen. Interambulacral plate showing tubercles and spines. X 3. 



Figs. 1-3 from photographs taken by A. C. Bridle, in Dublin; fig. 5 by J. W. Tutcher; fig. 4 by H. W. Tupper; fig. 6 

 drawn by G. C. Chubb. 



