Manchester Memoirs, Vol. Hi. (1908), No. 13. 9 



the Delos specimen, but the markings more typical. 

 Mr. Chapman figures a somewhat similar shell under the 

 name of .S. spiuigera, from the lagoon of Funafuti (:0l). 



Spirillina ornata, n. sp. (PI. 2, figs. 7, 8). 



The test is in the form of a very much depressed 

 cone. The outside edge of the coil on the superior 

 surface slightly overlaps, and appears to be in-the nature 

 of a keel, and is decorated with minute raised ridges, 

 except in the final convolution. The under surface of 

 the test is flat, and sealed up with exogenous shell- 

 deposit. The specimens are semi-opaque, and of a pale 

 milky-yellow colour. The peripheral edge is more or 

 less sinuous, unless this is due to fracture. 



Spirillina lucida, n. sp. (PI. 2, fig. 9). 



The test consists of about six convolutions, of which 

 only two or three are visible on the inferior surface. 

 The umbilical cavity is deeply sunk, and appears to me 

 to be slightly twisted. The perforations are very minute, 

 and the shell is convex on the upper surface. The 

 peripheral edge is sharp, and I have been unable to 

 detect the aperture. Very rare. 



ROTALIN^. 



Patellina, Williamson. 



*Patellina corrugata, Williamson. 



Patellina corrugata, Williamson ('58), p. 46, pi. 3, figs. 

 86-89. 



P. corrugata (Williamson), Carpenter ('62), p. 230, pi. 

 13, figs. 16, 17. 



P. corrugata (Williamson), Brady ('84), p. 634, pi. 86, 

 figs. 1-7. 



