PLATE IV. 
Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. 6. 
Fig. 1. 
Fig. 8 
Fig. 9 
Prohoscina conmcopice (Orb.). Middle Chalk : Chatham. 
Fig. la, zoarium, x 6 dia. ; Fig. lb, part of the same, witli 
gonocyst, x 18 dia. Vine Coll. [D. 986. J 
Prohoscina hokemica, Novak. Upper Chalk — Actiaocamax 
qnadratns zone : East Harnham, Wilts. Fig. 2«, zoarium, 
nat. size ; Fig. 26, part of a zoarium, x 14 dia. Gamble 
Coll. [D. 4316.] 
Prohoscina elevata (Orb.). Middle Chalk: Chatham. 
Expanded end of a zoarium, x 12 dia. Gamble Coll. 
[D. 4148.] 
Prohoscina hunstantoneasis. Vine. Upper Greensand : Cam- 
bridge. Vine’s type-specimen. Fig. 4«, zoarium, nat. 
size ; Fig. 46, jiart of the same, x 10 dia. Jesson Coll. 
[D. 2937.] 
Berenicea gracilis (Edw.), var. tenuis (Rss.). Middle Chalk : 
Chatham. Fig ba, zocirium, nat. size ; Fig. 56, part of 
a zoarium, x 12 dia. Gamble Coll. [D. 382.] 
Berenicea gracilis (Edw.), var. tenuis (Rss.). Upper Chalk ; 
Charlton. Fig. Qa, zoarium, nat. size ; Fig. 66, part of 
a zoarium, x 10 dia. Presented by G. C. Crick, Esq. 
[D. 3002.] 
Berenicea papgracca iOvh.). Middle Chalk: Chatham. Fig. 7 g. 
zoarium, nat. size ; Fig. 76, part of a zoarium, x 10 dia. 
Gamble Coll. . [D. 3884.] 
Berenicea contractu, Seeley. Upper Greensand : Cambridge. 
Fig. 8g, zoarium, nat. size ; Fig. 86, part of a zoarium, 
X 9 dia. Jesson Coll, [D. 2961.] 
Berenicea contracta, Seeley. Red Chalk : Hunstanton. 
Fig. 9 g, zoarium, nat. size ; Fig. 96, part of a zoarium, 
X 9 dia. Jesson Coll. [D. 2009.] 
