BRAOHIOPODA. 881 
Mantle with four trunk sinuses on each lobe; of the genital 
glands two pairs lie in the dorsal lobe and four in the ventral 
lobe. Structure and arrangement of the brachia as in 
TEREBRATULINA. 
Type, Magellania flavescens, Lamarck (sp.). 
Distribution. Jurassic — Recent (Arctic, Australo-Zealandian, 
Japanese, Peruvian and Magellanian Provinces). 
Dallina, Beecher. 1893. 
Magellaniiform shells, with long, recurved loop, small cardinal 
process and well developed dorsal median septum. The adult 
condition of the loop is attained by a series of metamorphoses in 
Fia. 5€0. Fria. 561. 
Fie 562, _ Fie. 563. 
Fias. 560-563. Dallina septigera, Lovén (sp.). 
immature conditions resembling successively the mature brachid- 
jum in Pratipra, Ismenta and Mijairepria. 
Type, Dallina septigera, Lovén (sp.). 
Distribution. Tertiary — Recent (Arctic, Boreal, Lusitanian, 
Japanese and Transatlantic Provinces). 
Ht tes 
