REPORT ON THE RADIOL ARIA. 1343 



20. Podocyrtis schomhitrgkii, Ehreuberg. 



Podoeyrtis schmnJmrgkii, Ehrenberg, 1854, Mikrogeol., Taf. xxxvi. fig. 22; Abhandl. d. k. Akad. 



d. Wiss. Berlin, 1875, p. 82, Taf. xiv. fig. 7. 



Shell ovate-conical, with two distinct strictures. Length of the three joints = 2:5:10, 

 breadth = 3 : 8 : 12. Cephalis hemispherical, with a large, straight, conical horn as long as the 

 abdomen. Thorax campanulate, smooth, with small, regular, circular pores. Abdomen inflated, 

 papillate, with very large, regular, hexagonal pores (three to four in the course of its length), five 

 times as broad as their bars and as the pores of the thorax. Feet as long as the abdomen, nearly 

 parallel, slightly bent outwards at the conical distal end. 



Dimensiotis. — Length of the three joints, a 0-02, h 0-05, c Ol ; breadth, a 0-0.3, h 0-08, c 012. 



Habitat. — Fossil in Barbados. 



21. Podocyrtis hexagonalis, n. sp. 



Shell nearly ovate, slender, everywhere covered with a regular network of high, hexagonal, denti- 

 culated crests, separating the circular, funnel-shaped pores, which are twice as large in the sub- 

 spherical abdomen as in the hemispherical thorax, between both of which are two deep strictures. 

 Length of the three joints =1:3:6, breadth = 2:5:6. Cephalis hemispherical, with a long and thin 

 cylindrical, vertical horn, as long as the abdomen. Feet of the same length and form, nearly 

 straight, slightly divergent. 



Dimenswns. — Length of the three joints, a 0-02, h 0-06, c 012 ; breadth, a 0-04, h O-Qll, 

 c 013. 



Habitat. — North Pacific, Station 244, depth 2900 fathoms. . 



22. Podocyrtis ovata, u. sp. 



Shell nearly ovate, papillate, without external strictures. Length of the three joints = 1:2:3, 

 breadth = 2:4:5. Cephalis hemispherical, with a pyramidal horn half as long as the shell. Pores 

 regular, circular, hexagonally framed, three times as broad in the inflated abdomen as in the conical 

 thorax. Feet pyramidal, little bent, divergent, about as long as the thorax. 



Dimcnsiom. — Length of the three joints, a 0-025, h O'Oo, c 0-08 ; breadth, a Q-Oo, h 0-095, c 0-12. 



Habitat. — Mediterranean, Corfu, Haeckel, surface. 



23. Podocyrtis tirceoldta, n. sp. 



1 Podocyrtis mitra. Bury, 1862, Polycystins of Barbados, pi. v. fig. 3. 



Shell nearly ovate, smooth, with two deep strictures. Length of the three joints = 1:2:6, 

 breadth = 2:4:5. Cephalis subspherical, with a stout, conical horn of the same length. Thorax 

 flat, hemispherical, with four to six transverse rows of small circular pores. Abdomen urceolate, 



