VINE : POLYZOA AND MICROZOA OF YORKSHIRE AND NORFOLK. 378 
Habitat : On Terehratula biplicata. 
6. Stomatopora divaricata, Roemer, pi. xvii., fig. 6a-6b 
1840. Aulopora divaricata, Roemer, vol. ii , p. 15,, pi. 17„ fig. 3. 
1850 = ? Alecto brevis, d'Orb., Terr. Cret., v., p. 840, pi. 629. 
1890. Stomatopora divaricata. Vine, Quart. Journ. Geol. Soc, 
vol. xlvi., p. 463. 
Adherent to a large number of fossils, many of them species of 
Inoceramus or Terehratula, is a peculiarly blunt, or stunted Stoma- 
topora, figures of which are given. The forms are not unlike the 
so-called Hippothoa inflata, Hall, a Silurian species first brought to 
our notice, with admirable descriptions and figures, by Professor H. 
A. Nicholson," In the Jurassic rocks there are similarly stunted 
forms, but as these have not been described I cannot refer to them 
more minutely. The Hunstanton examples of this species, if I am 
correct in my identification, are very characteristic ; and the figures, 
though sketched by the eye, may be relied on as pretty correct in 
outline. Detail sketches are not easy to obtain owing to the species 
being adherent to most of the larger fossils. 
Habitat : Type of fig. on Terehratula biplicata. 
7. Stomatopora linearis, d'Orb., pi. xvii., fig. 5. 
1852. Stomatopora linearis, d'Orb., Terr. Cret., v., p. 838, 
pis. 629-658. 
1890. Stomatopora linearis. Vine, Quart. Jour. Geol. Soc, vol. xlvi,, 
p. 466. 
I have met with only one unbrauched specimen of this species 
in the Red Chalk of Hunstanton. The example differs from 
d'Orbigny's fig. in some respect, but only slightly. The Zooecia of 
the British form are rather less oval than the French species of d'Orb. 
Habitat : On Terehratula biplicata. 
It may be well for the student to compare the British uniserial 
Stomatoporse, as figured on plate xvii., with foreign examples figured 
by d'Orbigny, Reuss, and other authors, because, to prevent the loading 
of our literature with new names, injustice is too often done to our 
British fauna in adopting foreign names for species without a proper 
caution being given. 
* Annal. Mag. Nat. Hist., a. 4, vol. xv., Feb , 1875, pi. xi., figs. 1-2, 
