38 
PEOBOSCINA. 
D. 3803. Encrusting a fragment of sp. (on slide). Middle Chalk. 
Chatham. Gamble Coll. 
D. 3802. A zoarium closely resembling the type -specimen, encrusting a frag- 
ment of Echinocorys^ sp. (on slide). Middle Chalk. Chatham. 
Gamble Coll. 
D. 3804. Encrusting an echinid plate (on slide). Middle Chalk. Chatham. 
Gamble Coll. 
D. 3134. Two free fragments of zoaria (on slide). Upper Chalk. Kent. 
Simmons Coll. 
D. 378. Encrusting a fragment of Mici-aster^ sp. (on slide). Middle Chalk. 
Chatham. Gamble Coll. 
D. 3806. A zoarium with very long branches (on slide). Middle Chalk. 
Chatham. Gamble Coll. 
D. 363. Encrusting a fragment of sp. (on slide). Middle Chalk. 
Chatham. Gamble Coll. 
D. 517. A young zoarium (on slide). Middle Chalk. Chatham. Gamble 
Coll. 
D. 3821. A zoarium with subalternate apertures, on echinid fragment (on slide). 
Middle Chalk. Chatham. Gamble Coll. 
Foreign. 
D. 4885. A young zoarium (on slide). Turonian: Craie marneuse. Villardin. 
Purchased 1898. 
d. Proboscina crassa (Rom.), var. alectodes. 
Yaeietal Charactees. 
Zoarium of numerous, crowded, uniserial or Stomatoporiform 
branches, which expand into very irregular, hiserial or multi- 
serial hands. 
Zooecia cylindrical or subfusiform ; walls smooth or wrinkled. 
Peristomes not very prominent. 
Dimensions. 
Length of zooecia ... 
Diameter of zooecia 
Diameter of aperture 
B.M. 
D. 3798. 
•5-1-3 mm. 
B.M. 
D. 2683. 
•5-* 9 mm. 
•3-*5 ,, ... •25--35 „ 
•15--2 „ ... -07--1 
Distribution. 
British : 
Upper Chalk : Houghton. 
Middle Chalk : Chatham. 
Foreign : 
? Cenomanian : Le Mans, Sarthe. 
