PROBOSCINA. 
35 
b. Proboscina crassa (Rom.), yar. divaricata 
(d’Orbigny). 
Stnoxthy. 
Idmonea divaricata, pars, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 86. 
,, ,, (won Rom.), d’Orbigny, 1851, Bry. Cret. pi. 631, figs. 9-11. 
non Stomatopora divaricata, Pocta, 1892. Mecb. Koryc. Hory : Ceska Ak. 
Fr. Jos. Praze, sect. ii. p. 11, pi. i. figs. 1-4. 
Idmonea crassa, d’Orbigny, 1850. Prod. Pal. vol. ii. p. 86. 
Frohoscina crassa, d’Orbigny, 1854. Bry. Cret. p. 848. 
,, ,, Pergens, 1890. Revision, p. 338. 
? Proboscina marginata {non Orb.), Sbarpe, 1854. Age Farringd. : Quart. 
Journ. Geol. Soc. vol. x. p. 191. 
? ,, ,, Morris, 1854. Cat. Brit. Foss., 2nd ed., p. 127. 
,, ,, pars. Vine, 1893. Cret. Pol. : Rep. Brit. Assoc. 1892, 
p. 329. 
Yarietal Characters. 
Zoarium of dichotomous branches, which may be very crowded. 
The branches are seldom uniserial, mainly biserial or triserial, 
and fairly regular. "Walls strongly wrinkled. 
Zooeeia subfiisiform. 
Peristomes prominent. 
Dimensions. 
PI. II. Pig. 8. Part of a zoarium, in which the wrinkling is 
obliterated by weathering ; X 6 dia. Lower Greensand. Parringdon. 
60 , 538 . 
Distribution. 
England : 
Lower Greensand : Parringdon. 
Foreign : 
Rbodanian : Fontenoy, Tonne ; Nozeroy, Jura. 
Neocomian : St. Croix, Vaud. 
B.M., 60,538. 
Length of zooeeia 
Diameter of zooeeia 
Diameter of apertures 
PiGURES. 
