18 
STOMATOPOEA. 
Diagnosis. 
Zoariuin of irregular tufts, wHcli may either branch dicho- 
tomously or give off branchlets at right angles to the main 
series. Occasionally the branches are locally hiserial. 
Zooecia very short ; suhfusiform ; with lightly wrinkled walls. 
Peristomes low ; generally elongate longitudinally. 
DlilENSIONS. 
Von Roraer’s type. 
Length of zooecia ... 
Diameter of zooecia ... lx 
Diameter of aperture ... "5x 
B.M., 60,252. 
•8 mm. 
Disteibtjtion. 
British : 
Upper Chalk : Sussex. 
Middle Chalk : Chatham. 
Foreign : 
Cenomanian: Le Mans, Sarthe ; Essen, Westphalia; Saxony, in Lower 
Pl&ner. 
Neocoraian — Hilsconglomerat : Schandelahe, Schoppenstedt. 
Figures. 
PI. I. Fig. 5. Part of the zoarium figured by Lonsdale as 
A. gracilis, and made the type of S. dixoyii by Vine ; X 7 dia. 
Dpper Chalk ; Sussex. Dixon Coll. 
Affinities. 
This species is characterized by its very short, crowded zooecia ; 
the Dpper Cretaceous specimens have longer zooecia than the 
typical i^eocomian form, and the specimen identified by von Reuss 
presents some resemblance to 8. calypso (Orb.). The Dpper 
Cretaceous forms may be only varieties of S. granulata, and it 
is with some hesitation that I accept the distinction. 
The type of Lonsdale’s Alecto gracilis and of Vine’s S. dixoni 
is an example of the Dpper Cretaceous variety; the specimen, 
however, identified by Vine as S. dixoni (Eep. Brit. Assoc. 1892, 
p. 307, x7o. 1), which is now in the British Museum collection 
(i^o. D. 717), is an 8. granulata of the long - branched type. 
The specimen marked by Vine as that which he identifies as 
^ X is used in cases where only comparative dimensions are available. 
