VINE : POLYZOA AND MIOROZOA OF YORKSHIRE AND NORFOLK. 375 
like Stomatopora " but with cells in two or more series."* As yet I 
have not found multiserial-serial Frohoscina in our own Silurian 
rocks, but the antiquity of the genus is sufficiently established by the 
citations already given. 
From the above notes, all too brief, it will be gathered that 
there is a difficulty whenever we attempt to establish Proboscina as a 
natural division of the Stomatopora group : yet I find that in spite 
of these difficulties, that both in the Red Chalk and also in the 
Upper White Chalk the adoption of the genus is most convenient, 
but only in very rare cases are similarities even, much less identity, 
between British and foreign species noticeable. 
The following species have been fully described in the paper 
already referred to, and as regards new species fully illustrated. 
8. Proboscina angustata, d'Orb., Terr. Cret., p. 852, pi. 632, 
figs. 7, 9. 
1890. Varieties (Vine) Quart. Jour. Geol. Soc, vol. xlvi., p. 467, 
pi. xix., 1, la. 
1885. Stomatopora gracillis (?) Vine, Proc. Yorksh. Geol. Soc, 
vol. ix., p. 4, pi. ii., fig. 7. 
Examples of this specie:5 are rare in the Red Chalk, and as they 
diifer from the type species of d'Orb., I place them here temporarily. 
Habitat : On Terehratukt biplicata. 
9. Proboscina rugosa (?) d'Orb. 
1852. Proboscina rugosa d'Orb., Terr. Cret. p. 853, pi. 633, figs. 6, 7. 
1890. ., „ (?j Vine, Quart. Journ. Geol. Soc, vol. xlvi., 
p. 468. 
Habitat : On Terebratula, Inoceramus and Ammonites. 
10. Proboscina irregularis. Vine. 
1890. Ibid. Quart. Journ. Geol. Soc Ibid, p. 468, pi. xix., figs. 
2a, 2b. 
Var. A. Figs. 2c, 2d. 
Habitat : On Terebratula and Belemnites. 
This species is only known to me by a few rather imperfect 
examples besides the type species. 
* Jour. Cincin. Soc. Nat. History, 1882, p. H9. 
