48 BULLETIN 64, UNITED STATES NATIONAL MUSEUM. 



beyond the solid dividing septa. The summit in this-specimen is more or less injured, 

 several of the septa are fractured, but there is a sufficient number to show that these 

 septa, when they have attained the summit increase in breadth, take a horizontal 

 direction, and unite into one, forming a solid circular plate in the centre. It is 2 J 

 inches long and If inches in diameter. 



This specimen which is almost perfect, together with the cup of another species and 

 the E. ovalis, have served to determine the generic characters detailed above. 



Observations. — The specimen which Hall identified as Eucalypto- 

 crinus sjplendidus of Troost differs from Troost' s specimen in the 

 greater length of the calyx in proportion to the length of the arms, 

 and in the fact that the backs of the plates between the arms are not 

 parallel but converge toward the top. The name, having been 

 published with a description by Hall, must be retained for his 

 species. Troost's species was described from another specimen by 

 Wachsmuth and Springer in 1892 and his specimen, therefore, takes 

 the name which they proposed. 



Formation and locality. — Brownsport limestone. Wayne and 

 Decatur counties, Tennessee. 



Cat. No. 39962, U.S.N.M. 



EUCALYPTOCRINUS OVALIS Hall. 



Plate 11, fig. 3. 



Eucalyptocrinites ovalis Troost, Proc. Amer. Ass. Adv. Sci., II (read 1849), 1850, 

 p. 60 (nomen nudum); MSS., 1850. 



Eucalyptocrinites tennesseex Troost, Proc. Amer. Ass. Adv. Sci., II (read 1849), 

 1850, p. 60 (nomen nudum); MSS., 1850. 



Eucalyptocrinus ovalis Shumard, Trans. Acad. Sci. St. Louis, II, No. 2, 1866, 

 p. 370 (catalogue name). — Hall, 28th Rep. New York State Mus. Nat. Hist., 

 1st ed., 1874, p. 143, pi. xvn, figs. 12, 13 (as E. ovatus in error; rectified in 

 2nd edition). — Wachsmuth and Springer, Rev. Palseocrinoidea, III, 1885, 

 p. 134 (catalogue name). — Miller, North Amer. Geol. and Pal., 1889, p. 244 

 (catalogue name). — Wachsmuth and Springer, North Amer. Crinoidea 

 Camerata, 1899, p. 344, pi. lxxxii, figs. 1 to 6. 



Eucalyptocrinus tennesseex Shumard, Trans. Acad. Sci. St. Louis, II, No. 2, 1866, 

 p. 370 (catalogue name). — Wachsmuth and Springer, Rev. Palseocri- 

 noidea, III, 1885, p. 134 (catalogue name). — Miller, North Amer. Geol. 

 and Pal., 1889, p. 244 (catalogue name). 



The following description of Eucalyptocrinus ovalis is by Troost : 



It differs from the E. splendidus in being not so elongated and its plates being not 

 convex but flat. The cavity for the insertion of the column is circular, not deep and 

 is surrounded by numerous small circular pits, which though they are found on all the 

 individuals of this and of another species, I consider as accidental, perhaps made by 

 a parasite. The hand and fingers [arms] do not project beyond the general level and 

 are externally flat. The solid dividing septa are beautifully united into one at the 

 apex forming a circular plane, more or less concave, having in the centre a circular 

 elevation, the whole having the form of a rosette. Each pair of fingers [arms] which 

 are slightly lanceolate, fit exactly between two septa. If these fingers were removed, 

 the body would have some resemblance to an apple or orange out of which ten longi- 

 tudinal sections were cut without going to the core. 



