54 Dr. G. J. Iliiide on Radiolaria from the 



Dor2/pkgma f/racile, sp. n. (PI. III. fig. 8.) 



'J'he reticulate or spongy framework close, with small irre- 

 gular apertures. Spine conical, tapering, about as long as the 

 diameter of the shell. Smaller than the preceding form and 

 with longer spine. Diameter of cortical shell '13, of medul- 

 lary test -05; length of radial spine -15, basal thickness 'Olo 

 millim, 



J)istnhution. Hartree Hill, Peeblesshire. 



Genus DORYDICTYUM *, gen. nov. 



Sphseroidea with tests of irregularly reticulate or spongy 

 framework and a simple radial spine, with or without secon- 

 dary spines. The structure of the test corresponds with that 

 of htyptosphcera, llajckel, and it differs from this genus by 

 the addition of a radial spine. It is distinguished from 

 Doryplegma by the absence of a medullary test. 



Dorydictyum swiplex, sp. n. (PI. III. fig. 7.) 



The reticulate framework of the same character throughout, 

 with very minute pores. Radial spine robust, styliform, 

 nearly as long as the diameter of the shell. Occasional 

 minute secondary spines. Diameter of the test '15} length 

 of radial sj)ine '12, basal thickness '022 millim. Rare. 



Distribution. Broughton Heights, Broughton, Peeblesshire. 



Genus Teiposph^ra f, gen. nov. 



Sphseroidca with an irregularly reticulate or spongy frame- 

 work, a medullary shell, and three primary radial spines. 

 Smaller secondary spines occasionally present. 



Forms with sj)herical shells and three prominent radial 

 spines, but without a medullary shell, have been described by 

 Dunikowskil from the Liassic strata of Schaf berg, and placed 

 by him in the genus tSj^ongechinua^ Haickel ; but in the 

 'Challenger' Report § one of them is regarded as discoidal 

 and referred to the genus ISponyotrijius, H. Dr. Riist has 

 also described rounded Utttictd forms with three prominent 

 spines I'rom Jurassic and Cretac(;ous strata; they were origi- 

 nally placed in the new genus Triactoma (Palajontogr. 



* hopv, a spear, biKTvou, network, 

 t TpiTTovs, a tripod, a(j)a~ipa, ^pheio. 



X Denliselir. d. k. Akad. der Wiss. Wieii, Ikl. slv. p. 188, pi. v. 

 ligf. 54, ol>. 

 § Pt. i. p. 581. 



