48 DISCOVERY REPORTS 



15. Miliolina bosciana (d'Orbigny) (F 16). 

 Four stations: 140, 144, 149; WS 33. 



Rare and very small at WS 33. More frequent at the other stations. All the specimens 

 are very thin-walled. 



16. Miliolina subrotunda (Montagu) (F 18). 



Six stations: 45, 144, 145, 157; WS 25, 27. 



Typical but verj-- rare, except at WS 25, where it is fairly frequent. 



17. Miliolina lamarckiana (d'Orbigny) (F 20). 

 One station : WS 50. 



A single small specimen. 



18. Miliolina pygmaea (Reuss) (F 25). 

 Three stations: 149; WS 32, 33. 



Very rare, the best specimens at WS 32 ; very small and pauperate at St. 149. 



19. Miliolina venusta (Karrer) (F 26). 

 One station: WS 2^. 



A single small specimen. 



20. Miliolina tricarinata (d'Orbigny) (F 28) (Fig. 3). 

 Eight stations: 45, 144, 148; WS 33, 43, 429, 522, 523. 



/ m 'a n 



Fig. 3. Variations in the aperture of Miliolina tricarinata. 



Usually rare and very small at WS 429, 522. Larger at WS 33. At St. 144 the species 

 is common and attains a very large size up to 2-0 mm. in length. The aperture at this 

 station varies with the size of the individual, being typically Milioline in the smallest, 

 cruciform in the medium, and irregularly stellate in the largest specimens. The medium 



