PEOBOSCIXA. 
25 
And the third character is mvalidated by the inclusion of some 
triserial specimens in P. angudata. 
Tine has figured a specimen from the Eed Chalk of Hunstanton, 
which he refers to this species ; hut the specimen encrus- 
tation on D. '2009) is indeterminable. The record of P. rugosa, 
from the Eed Chalk of Hunstanton, by Vine, is also based on an 
indeterminable specimen. B.H., D. 2017. 
Stoliczka has described a specimen from the Arrialoor Series of 
Southern India, which has stouter zooecia than the European 
forms, hut which otherwise coiTesponds with this species. 
The nearest Jurassic ally of this species is a regular form of 
P. desoudini (Haime), figured in Cat. Jur. Bry., PI. II. Eig. 3, 
which has suhclavate branches with the zocBcia more crowded at 
the distal ends ; the zoarium is more regular than in Haime’s type 
of P. desoudini. 
Among Cainozoic Prohoscince this species is perhaps nearest to 
P. tr if aria (Eom.),^ from the German Oligocene, which appears 
to have coarser and stouter zooecia, with the peristomes often more 
crowded together than in the Cretaceous species. Manzoni has 
figured as Alecto repens., V^ood,” a triserial zoarium with very 
long annulated zooecia, which presents far closer resemblance to 
this species than does Busk’s^ type, for it has short and crowded 
zooecia. 
Prohoscina major (Johnst.),® with its hiserial-triserial zoarium, is 
the living ‘ species ’ most resembling P. angustata (Orb.) ; hut 
according to Hincks’ figures the zooecia are * *8 mm. in diameter, 
and are thus much larger than in the Cretaceous specimens. 
LIST OF SPECIMENS. 
British. 
60 , 470 . A zoarium encrusting an echinid fragment, Epper Chalk. England. 
J. Morris Coll. Figd. PI. II. Pig. 1. 
60 , 464 , A zoarium encrusting an echinid plate (on slide). Chalk. Loc. ? 
J. Morris Coll. 
1 Tuhulipora trifaria, von Eomer, 1863. Polyp, nordd. Tert. : Pal^ontogr. 
vol, ix. p. 220, pi. xxxvii. fig. 2. 
2 Busk: Crag. Polyz. p. 112, pi. xx. figs. 6, 8. 
* Alecto major, Johnston: Brit. Zooph., 2nd ed. (1847), vol. i, p. 281, 
pi. xhx. figs. 3, 4. 
