40 THE CRAG POLYZOA. 



$ 1. ARMA. 



(a) With oral spines. 

 1. L. PUNCTATA, HassaU. PI. IV, fig. 1. 



Cellulis subcylindricis, irregularibus, socpe iramersis, foraminosis ; punctnris in 

 seriebus transversis dispositis ; orificio oblongo, transverso, subinde angustissimo, labio 

 inferior! prominente, ruucronato ; utrinque avicularium ostendente. Supra 4 6 spinis 

 raarginalibus non raro absentibus. Ovicellulis pyramidalibus facie anteriori carinatis, 

 subinde avicularium parvuni surninitate gerentibus. 



Cells subcylindrical, irregular, often wholly immersed, foraniiniferous ; punctures' in 

 transverse rows ; orifice oblong, transverse, occasionally very narrow ; lower lip projecting, 

 mucronate ; 4 6 marginal spines above, often absent. Ovicell pyramidal, keeled in 

 front, and sometimes crowned with a small avicularium at the summit ; an avicularium on 

 each side of the orifice (sometimes absent). 



L. PUNCTATA, H assail ; Johnst. ; Busk, B. M. Cat., pt. ii, p. 80, pi. xc, figs. 5, 6; pl.xeii, 

 fig. 4 ; pi. xcvi, fig. 3. 



Habitat. C. Crag, on shells, S. Wood; J. S. B. (very common). (Recent) 

 Britain. 



A very protean species in the recent state, though presenting very constant characters 

 in the fossil. 



2. L. INNOMINATA, Couch. PI. IV, fig. 2. 



Cellulis ovatis, utrinque sulcis 6 7 e linea central! divergentibus, porosis signata; 

 orificio semicircular! labio inferior! recto ; facie cellulse anteriori juxta orificium medio per- 

 forata, tuberculo obtuso utrinque munita ; spinis rnarginalibus quinque. Ovicellula facie 

 anteriori carinata ; aviculariis inter cellulas raro sparsis. 



Cells ovoid, with G 7 grooves on each side radiating from a central line; a line of 

 minute pores along each sulcus ; orifice semicircular, straight below ; a perforation in the 

 median line close below the orifice, on each side of which is a blunt tubercle ; five mar- 

 ginal spines. Ovicell keeled in front ; avicularia sparingly scattered among the cells. 



L. INNOMINATA, Couch ; Johnston ; Gray ; Busk. 



Habitat. G. Crag, S. W. (Recent) Britain. 



