178 MICROPORIDJE. 



STEGANOPORELLA SMITTII. 



Plate XXIV. figs. 5, 0. 



MEMBRAIUPORA ANDBOAVEXSIS, Busk, Crag Pol. 3T), pL li. figs. 5 &0 (probably 

 not Eschara Andegavensis of Micholin). 



Zocecia large, elongate, subquadrangular, slightly arched 

 above ; margins granular, the front wall punctate, rising 

 somewhat abruptly towards the orifice, an oval foramen 

 in a recess on each side a little below the mouth ; ori- 

 fice suborbicular, contracted below by a small projection 

 on each side, with the lower lip slightly curved out- 

 wards ; the upper margin thickened, the lower thin. 

 Avicularia distributed amongst the zocecia, placed on an 

 area nearly as large as the cell, which is arched above and 

 pointed below ; mandible of a dark horn-colour, occu- 

 pying nearly two thirds of the area, flat, contracted 

 towards the point of attachment, expanded and rounded 

 above, strengthened by a narrow central plate. Ocecia 

 ample, rounded, very broad (much broader than high), 

 flattened at the top, smooth, carinate in front, with a 

 large arched opening closed by a horny movable lid. 



Colony forming a thin whitish crust. 



HABITAT. On the tube of an Annelid from deep water. 



LOCALITY. Off the Cornish coast, incrusting a Serpula 

 (C. W. P.). 



RANGE IN TIME. Coralline Crag, on shell (SearlesWood). 



For this fine addition to our fauna we are indebted to 

 Mr. Peach, who has obtained it on two occasions from the 

 Cornish coast. 



There can be no doubt as to the identity of the British 

 specimen which I have examined with the Crag fossil ; 

 but I can hardly agree with Mr. Busk in referring the 



