30 
PEOBOSCINA. 
Diagnosis. 
Zoarium of irregular, multiserial branches, which are long and 
narrow, and expand slowly. The branches are never very 
wide. In the typical form they are nodulose ; or in var. 
toucan they occur as irregular bands. The branches are 
usually free laterally ; but in crowded specimens they may 
overlap and anastomose. 
Zooecia long, narrow, and well-marked off from one another. 
The walls are plain. 
Apertures small and irregularly distributed. Peristomes low. 
Dimensions. 
Length of zooecia 
Diameter of zooecia 
Diameter of aperture 
Disteibution. 
England : 
Upper Chalk : Houghton, Sussex. 
Middle Chalk : Chatham. 
? Eed Chalk : Hunstanton. 
Foreign : 
Senonian — Maastrichtian : Meudon, near Paris; Fecamp, Seine 
Inferieure. 
Campanian — Zones of Micraster fastigiatm and M. glyphu* : 
Reims and Epernay. 
Santonian : Cachembach, near Chartres. 
Coniacian: Tours, Marne, and Joue, Indre-et-Loire. 
Turonian: Yillavard, Loir-et-Cher ; Merpins, Charente ; Cas, near 
Beausset, Var. 
Cenomanian: Le Mans, Sarthe ; Schillinge, near Bilin, Bohemia, in 
Lower Planer ; Rank, Bohemia, in Korycaner Schichten. 
Rhodanian : Vassy, Haute-Marne. 
Neocomian : St. Croix, Vaud. (Var. ziczac.) 
PlGUllES. 
PI. III. Fig. 2. Part of a zoarium of var. toucan., nat. size 
(Fig. ^a'), and X 14 dia. (Fig. 2J). Middle Chalk : Chatham. 
Gamble Coll. D. 466. 
PI. III. Fig. 3. Part of a zoarium of var. toucasi, - with 
narrower branches ; X 1 6 dia. Middle Chalk : Chatham. Gamble 
Coll. D. 2669. 
D’Orh. type of 
Pocta’s var. toucasi B.M. B.M. 
S. disjecta. {_/?</<; Pergens). D. 2669. D. 3813. 
— -0--7 mm. *8 mm. *4--8 mm. 
•13-‘15 mm. •12-’15 ,, -18 ,, "IS ,, 
•09--1 „ -Oo-'Oe „ -1 -08 
