338 , Transactions of the Society. 



Observations. — In Zyyosporites * the spinules on the exterior are 

 short and sparse, but usually blunt or expanded at the tip. 

 Sporocarpon, sensu stricto, has a thick and even cellular wall. 



Occurrence. — Upper Devonian; Ebersdorf, Silesia. Also Schiibel- 

 hammer, Bavaria. 



Qenus Traquairia Carruthers, 1872.t 

 Traqiiairia tentaculifera sp. n. (PL VIII, fig. 3.) 



Description. — The body of the (?) megasporeis roughly spherical, 

 with numerous depressions between the bases of the flexuous 

 spines. The irregular shape of tlie sphere suggests a thin cortex 

 which has shrunk. The larger spines number about 12 to l-i on 

 the entire surface. Smaller spines more numerous. 



Dimensions. — Diameter of body, 1'27 mm. ; length of primary 

 spines, 0'92 mm. ; length of secondary spines, 0'23 mm. 



Ohservatio7is. — This form might also easily be mistaken for a 

 Hcliosp)hxra. Its large size and shrunken body with very flexible 

 spines mnkes its plant origin more certain. 



Occurrence. — Upper Devonian ; Scliiibelhammer, Bavaria. 



Genus Calcisphxra Williamson, 1880.J 



Calcisplixra spinosa "Williamson. (PI. VIII, fig. 5.) 



Calcisjohssra spinosa Williamson, 1880, Phil. Trans. Roy. Soc, vol. clxxi. p. 

 522, figs. 70-77 (especially figs. 74 and 75). 



Observations on Pr'esent Specimens. — Body spherical, inner sphere 

 about one-fourth the diameter of the outer. Connected to the 

 outer sphere by numerous slender radii. Wall of outer sphere 

 with about five blunt processes showing in one plane. 



Dimensions. — Diameter of outer sphere, 0*08 mm. ; diameter of 

 inner sphere, 0*022 mm. 



Occurrence. — Middle Devonian {String ocephalus Limestone); 

 Paffrath, the Eifel. 



Calcisphsera within a Sporocarpon. (PI. VIII, fig. 6.) 



Description. — A spherical body, one of many less distinct in 

 appearance, seen under a high magnification resting within the 



* Phil. Trans., vol. clxxi. pt. 2, p. 516, pl. xix, fig. 55. 



t Quart. Journ. Micr. Sci , n.s. vol. xviii. 1872, p. 397. Also Rep. Brit. Ass. 

 Adv. Sci. Brighton, 1872, p. 126. See also Williamson, W. C, Ibid., Dublin, 1878. 

 p. 534. Note. — The original spelling is correctly given as Traquairia, but later 

 references have it written Traq^iaria. 



X Phil. Trans. Roy. Soc, vol. clxxi. p. 521. 



