PEOBOSCINA. 
41 
The zooecia of the uniserial branches are closely allied to those 
of P. crassa, alecfodes. 
D. 997. A zoarium encrusting a shell fragment (on slide). Middle Chalk. 
Chatham. Vine CoU. Figd. PI. II. Fig. 6. 
6. Proboscina alternata, d’Orbigny, 1853. 
SYNONrMT. 
Froboscina alternata, d’Orhigny, 1853. Bry. Cret. pi. 760, figs. 4-6. 
M ,, d’Orbigny, 1854. Ibid. p. 857. 
,, ,, Pergens, 1890. Revision, p. 338. 
Diagnosis. 
Zoarium simple, biserial or triserial. 
Zooecia of medium length ; transversely wrinkled. 
Peristomes very tall. 
Distribution. 
Foreign : 
Senonian — Maastrichtian: Fecamp, Seine- Inf erieure; Sainte-Colomhe, 
IVlanche, in Craie a baculites. 
Coniacian : Tone, Indre-et-Loire, and Vendome, Loir-et- 
Cher, in Craie de Villedieu. 
Turonian: Villardin, Loir-et-Cher, in Craie marneuse. 
A FFINITIES. 
This ‘ species ’ is a near ally of P. crassa, var. francorum, from 
which it differs by the great elevation of the peristomes. According 
to M. Pergens it is the adnate form of Entalophora proboscidea. It 
is closely allied to, and perhaps identical with, P. linearis (Pss.), 
from the Saxon Cenomanian. Among Cainozoic ‘ species ’ it 
presents most resemblance to Piastopora partschi, von Eeuss,^ the 
generic position of which, however, is doubtful, as in the larger 
specimens figured the zooecia occur in alternate pairs. 
D. 4841. A small zoarium encrusting a Bryozoan stem (on slide). Turonian : 
Craie marneuse. Villardin. Purchased 1898. 
^ Von Reuss. Foss. Pol. Wien. Tert. : Naturw. Abb. vol. ii. p. 52, pi. vii. 
figs. 16, 17. 
