Maryland Geological Survey 247 



SPHiEROCYSTITES GLOBULAEIS Schuchert 



Plate XXXIV, 'Figs. 13, 14; Plate XXXV, Figs. 5, 6; 



Plate XXXVI, Fig. 1 



Spharocystites globularis Schuchert, 1903, Amer. Geol., vol. xxxii, p. 2.33. 

 Sphwrocystites globularis Schuchert, 1904, Smith. Misc. Col., vol. xlvii, pt. ii, 

 No. 1482, pp. 252, 253, pi. xxxviil, figs. 3-5; pi. xxxix, figs. 5, 6; text figs. 



40, 41. 



Fig. 16. — Diagrams showing the number of ambulacral branches in two 

 specimens of Spharocystites globularis Schuchert. 



Description. — Ambulacra branching with no apparent regularity, the 

 branches in adults varying between 9 and 14. Ambulacralia about 7 to 

 each ambulacral. Anal pyramid depressed, composed of 8 pieces, and sur- 



<5^S7/ 



^^ 



"-^/^'"'^^.> w 



Fig. 17. — Analysis of Sphwrocystites globularis Schuchert. 



rounded by a ring of 4 large and 10 small plates. Hydropore minute, 

 closed by a pyramid of 5 pieces, and situated immediately in front of the 

 elongate dumb-bell -shaped madreporite on plate 21. Column tapering 

 rapidly for a very short distance and then hardly at all throughout the re- 

 mainder of its length. Total length about 95 mm., with the root end 

 about 7 mm. high. First 11 segments beneath the theca thinnest, with 



