14 SlDEBOTTO^r, Forajiii)iifera frovi t/ic Island of Delos. 



Polystoiiiella crispn, var. {luviionhia) tiirgida, Parker 

 and Jones ('65), p. 405, pi. 17, fig. 5/. 



Ahviiojiina tiirgida (Williamson), Brad}- ('84), p. 731, 

 pi. 109, figs. 17-19. 



All the specimens are developed inequilaterally. Rare. 



Polystomella, Lamarck. 



*Polystomella striatopunctata, Fichtel and Moll, sp. 

 (PI. 4, Fig. 10, and PI. 5, Figs, i, 2.) 



Nautilus striatopuiu-tatns^ Fichtel and Moll (:03) p. 61, 

 pi. 9, figs. a-c. 



P. striatopuuctata (F. & M.). Terrigi ('80), p. 216, pi. 4., 



fig^- 7Z^ 74- 



P. striatopuiictata (F. & M.), Brady ('84). P- 7l1^ pl- 109, 

 figs. 22, 23. 



Polystomella striatopunctata (F. & M.), Brad}-, Parker, 

 and Jones ('88), p. 230, pl. 43, fig. 17. 



This common and variable species occurs in three 

 forms. The first, as figured Pl. 4, Fig. 10, is transparent 

 and much flattened, and the " fossettes " are feebly marked. 

 In the second* variety, Pl. 5, Fig. i, the test is much 

 stouter, the perforations shew distinctl}-, and the "fossettes" 

 in certain lights shew a fine, or a dotted line, on either 

 side, proceeding from the umbilicus to the periphery. 

 These lines are somewhat too distinct in the illustration. 

 The third form, Pl. 5, P^'g. 2, has the whole of the test (in 

 most ca.ses) apparentl}- very finely granulated, especially 

 in the region of the " fossettes," this giving the test a 

 banded appearance. When damped the " fossettes" shew 

 • juite plainl}-. 



The first variety, rather rare ; the second, frequent ; 

 and the last, not so frequent. 



