PROBOSCIXA. 
43 
Dimeksions. 
Length of zocecia 
Diameter of zocecia 
Diameter of aperture ... 
Pergens. 
•3-'4 mm, 
•17--2 „ 
•05- 06 ,, 
B.M., D. 441. 
•3-*5 mm. 
... -15 „ 
Novak’s P. suessi 
(pi. V. fig. 17). 
•4 mm. 
Disteibutiox. 
England : 
Middle Chalk : Chatham. 
Red Chalk : Hunstanton. 
Foreign : 
Cenomanian : Kank, Jine, Kamajk, and Zbislav, Bohemia, inKorycaner 
Schichten ; Le Mans and St. Calais, Sarthe ; lie 
Madame, Charente-Inferieure ; and Tourtenay ; Cap 
de la Il^ve, Seine -Inferieure, in Craie glauconieuse. 
Rhodanian : Vassy, Ilaute-Marne ; Nozeroy, Jura. 
Figures. 
PI. III. Fig. 8. A zoarium from Middle Chalk, Chatham. 
The specimen is intermediate between the typical F. sarthacensis 
and F. cornucopia (Orb.). Fig. the zoarium, natural size; 
Fig. 8i, part of the same, X 14 dia. Gamble Coll. D. 441. 
Affinities. 
The name Frohoscina sarthacensis was proposed by Pergens for 
the Bryozoa described by d’Orbigny as Frohoscina ramosa, a name 
preoccupied owing to the transfer of Milne Edwards’ Alecto ramosa 
to this genus. In the Cat. Jur. Bry. (pp. 62, 63) it was proposed 
to regard Pergens’ species S. sarthacensis as identical with Aulopora 
ramosa of von Hagenow, but reconsideration of von Hagenow’s 
diagnosis suggests a different intei-pretation of that species. It is 
probably after all a Stomatopora ; but as Milne Edwards’ Alecto 
ramosa predates the species named ramosa by von Hagenow, 
Michelin, and d’Orbigny, and as it is clearly not the same as 
Michelin’s Biastopora ramosa, the name F. sarthacensis is valid. 
F. suessi of Novak is a variety with clavate branches, which 
proximally are usually narrow ; F. linguata, Nov., appears to be 
the same, but with broader, shorter tufts. 
The nearest allies of this form are Frohoscina fasciculata (Bss.) 
and F. cornucopia (Orb.). From the former it differs by the 
greater width of the distal ends of the branches, by the fact that 
