S8 THE CRAG POLYZOA. 



Genus 2. Lunulites. 



Cellulis radiatim in seriebus cnm vibraculorum seriebus plus minusve regulariter alter- 

 nantibus dispositis. 



Cells arranged in more or less regnlar series, radiating from the centre ; vibracula in 

 linear series, alternating more or less regularly with those of the cells. 



LuNtLiTES, Lamouroux ; Busk, B. M. Cat., p. ii, p. 100. 



— (pars), Auctornm, including Discoflustrellaria, U Orhigny . 



1. L. coNiCA, Befrance. PI. XIII, fig. 4, 



Polyzoario cupuliformi vel depresso, subacnminato, annulato, solido vel cavo ; cellula- 

 nnn aperturis supra arcuatis, infra trigonis, suborbicularibus vel hexagonis, in annulis 

 concentricis, regularibus, rugis clevatis sejunctis, dispositis. Superficie dorsali sulcis 

 bifurcatis, undulosis signata ; liris porosis. 



Polyzoarium cupuliform, subacuminate, annulated, solid, or hollow ; apertures arched 

 above and three-sided below, suborbicular or hexagonal ; disposed in regular circles 

 around the cone, the circles being separated by prominent ridges ; vibracula in series 

 alternating regularly with those of the cells. Posterior surface sulcate, sulci bifurcating 

 and wavy ; ridges porous. 



LuNDLiTES CONICA, Befrance, Diet, des Sc. Nat., xxvii, p. 3G1 ; Michelin, [con. Zoopb., 

 p. 323, pi. Ixxvii, fig. 9. 

 Var. n. Depressa. 



L. uiicEOLATA, Goldfuss, Petvcf. Ger., p. 41, pi. xii, fig. 7; (?) Cuviei- and Brongniart, 

 Descr. Geolog. d. Env. de Paris, pi. viii, fig. 9; (?) Bronn., Syst. d. Urwelt. 

 Pflanz;, pi. vi, fig. 10: (?) Lamarc/c, Ann. S. Vert., 2d ed., ii, p. 300 

 (ex. syn. expart.) ; (?) 3Iichelin, Icon. Zooph., p. 175, pi. xlvi, fig. 6 

 (not Lamovroux, Exp. Meth., p. 44, pi. Ixxiii, figs. 9 — 12). 

 CUPULARIA URCEOLATA (?), Broitn., Leth. Geog., pi. xxxv, fig. 28. 



Habitat. — C. Crag, Sutton, Red Crag, S. W. ; Salles (Gironde), Ste. Maure, Man- 

 thelon (Indre-et-Loire), Michelin ; ? Qrignon, Goldfuss, Cuvier, and Brongniurt ; ? Parnes, 

 Chaumont (Paris Basin) ; Faluns of Anjou and Touraine, Michelin. 



The figure of L. conica, Defrance, contained in the ' Icon. Zoophyt.,' of M. Michelin, 

 who had access to M. Defrance's collection, leaves no doubt of the identity of the Crag fossil 

 with that species. Nor can there, I think, be much doubt that the form figured by Goldfuss 

 (1. c.) corresponds with it also, and represents the depressed variety. The species figured 



