376 VINE : POLYZOA AND MICROZOA OF YURKbHIRE AND NOREOLK. 
11. Proboscina iiberima, Vine., Quart. Jour. Geol. Soc, vol. xlvi., 
p. 469, pi. xix., figs. 3a-3b. 
Habitat : On Imceramus ? sulcatus. 
The type species is the only example that I have met with in 
the Red Chalk. 
12. Proboscina gracilis, Reuss, var. Reussi, Vine, Quart. Journ. 
Geol. Soc, vol. xlvi., p. 469, pi. xix., figs. 4-4b. 
Habitat : On Terehratula hipUcata. 
This species is also rare in the Red Chalk. 
13. Proboscina subelegans, d'Orb., Terr. Cret. v., p. 853, pi. 759, 
figs. 8-13. 
1890. Stomatopora subelegans, Pergen& Rev. Bryoz. Crei., p. 332, 
pi. xi., fig. 3. 
1890. Proboscina subelegans. Vine, Quart. Jour. Geol. Soc, 
vol. xlvi., p. 470. 
Of this species I noticed in the material placed in my hands 
for description about three fairish examples only. 
Habitat : On Inoceramus. 
14. Proboscina liunstantonensis. Vine, Quart. Journ. Geol. Soc, 
vol xlvi., p. 470, pi. xix., fig. 5. 
Habitat : On Inoceramus and Terebratula biplicata. 
This is by far the most characteristic and abundant of the Red 
Chalk Probiscinae. The variety differs from the type species, but I 
find that it is impossible to seperate them altogether except by a 
varietal term. 
15. Proboscina liunstantonensis. Vine. Var. ampliata, Vine, Ibid, 
pi. xix, figs. 6-6a. 
Habitat : On Inoceramus. 
Not so abundant as the typical form. 
16. Proboscina Jessoni, Vine. Ibid, p. 471, pi. xix., figs. 7a-7b. 
Habitat : On Terebratula biplicata. 
This beautiful and well-marked species is rare in the Red Chalk. 
It is not often that we meet with examples of Proboscina having the 
orifices of the cells closed, but in this species several of the middle 
cells of the colony have not only closed cells, but the ''closures" are 
delicately perforated. 
