340 
3IELICEEITITES. 
Foreign. 
D. 6314. A fragment (on slide). Senonian : Mucronatenkreide. Biigen. 
Laur Coll. 
D. 6315. A fragment (on slide). Senonian : Mucronatenkreide. Riigen. 
Laur Coll. 
9. Meliceritites parviarmata, nov. 
Diagnosis. 
Zoarium of tMn branches. 
Zooecia hexagonal, separated by raised vertical ridges. Apertures 
circular, or Tvith a straight lower margin, arranged in regular, 
fairly distant verticels. 
Avicnlaria or vibracula numerous, but small : they are rhom- 
boidal in shape, and occur at the angles between the zooecia. 
Avicularian apertures small, circular, or elliptical. 
Di:u;exsioxs. 
Diameter of branch 
Diameter of zooecia 
Diameter of aperture ... 
External length of zooecia 
External length of artcularia . 
Disteibetiox. 
Middle Chalk : Chatham. 
1*2 mm. 
•26 „ 
•1--12 „ 
•5 ,, 
*2 
Eigeee. 
PI. XT. Pig. 1. A branch, x 12 dia. Middle Chalk: Chatham. 
Gamble Coll. D. 4529. 
Affinities. 
This species is characterized by the absence of the long spatulate 
avicnlaria ; they are replaced by numerous rhomboidal zooecia, 
which may be avicnlaria or, more probably, vibracula. By the 
characters of its normal zotBcia it is allied to M. undata. 
D. 4529. A branch (on shde). Middle Chalk. Chatham. Gamble Coll. 
Figd. PL XY. Fig. 1. 
10. Meliceritites undata, d’Orbigny, 1853. 
STNONTilY. 
Meliceritites undata, d’Orbigny, 1853. Bry. Cret. p. 625, pi. 737, figs. 11-14. 
,, ,, Bucaille, 1890. Bry. Seine-Inf.: Bull. Soc. Sci. nat. 
Rouen, vol. xxv. p. 511. 
,, franeqi, d’Orbigny, 1853. Bry. Cret. p. 626, pi. 737, figs. 15, 16. 
