REPORT ON THE RADIOLARIA. 1083 



4. Tiarospyris amphora, n. sp. (PL 87, fig. 8). 



Shell amphora-shaped, iu the upper half smooth, in the lower spiuy, without external sagittal 

 stricture. Cephalis subspherical, with a small number of . irregular, large, roundish pores, which 

 are closed by a thin fenestrated lamella. Cupola flat, cap-shaped, with numerous small pores. 

 Base covered with numerous conical divergent feet of different sizes, the largest one-third as long 

 as the shell. Internal sagittal ring ovate, nearly free. 



Dimensions. — Shell 0-14 long, 0'13 broad ; ring Ol long ; feet 0'04 long. 



Habitat. — South Pacific, Station 285, depth 2375 fathoms. 



Genus 473. Pylospyris,'^ Haeckel, 1881, Prodromus, p. 443. 



Definition. — T li o 1 o s p y r i d a without basal feet, with an apical horn. 



The genus Pylospyris was first known from a Mediterranean species, called by me, 

 in 1862, Spyridohotrys trinacria. As this name was given erroneously, on the supposi- 

 tion of a near relation to the Botryodea ( = Polycyrtida), I changed it afterwards to 

 Pylospyris. This genus differs from the other Tholospyrida in the total absence of 

 basal feet, and may therefore be derived either from them by reduction of the feet, 

 or from Dictyospyris by formation of a galea. 



1. Pylospyris denticulata, Haeckel. 



Lithopera denticulata, Ehrenberg, 1873, Abhandl. d. k. Akad. d. Wiss. Berhn, p. 297, Taf. xii. 



II. fig. 7. 

 Lifhobotrys denticulata, Ehrenberg, 1844, Monatsber. d. Akad. Berlin, p. 203. 



Shell spinulate, with sHght coronal and deep sagittal constriction, with irregidar, roundish pores 

 of variable size. Galea hemispherical, about half as long and broad as the nut-shaped cephalis. 

 No symmetrically disposed larger pores. 



Dimensions. — Galea 0-04 long, 0'06 broad ; cephalis 0'08 long, 01 broad. 



Habitat. — Antarctic Ocean, Ehrenberg. (Included iu the ice.) 



2. Pylospyris trinacria, Haeckel. 



Spyridobotrys trinacria, Haeckel, 1862, Monogr. d. Radiol, p. 341, Taf. xii. figs. 8, 9. 



SheU tuberculate, with sharp coronal and sagittal stricture. Galea campanulate, with very 

 small circular pores, and a short conical apical horn of the same length. Cephalis nut-shaped, with 

 large, irregular, roundish pores ; two pairs of larger annular pores on each side of the sagittal ring, 

 also four larger pores in the basal plate. 



Dimensions. — Galea O'OS long, 0'04 broad ; cephalis 0"04 long, 0'07 broad. 



Habitat. — Mediterranean, Messina, surface. 



1 Pi/Zo.spyn's = Basket with gates ; ■!ri/X>i, sirvoi;. 



