STOMATOPORA DEPLEXA. 4i37 



short cylindrical processes^ most of them truncate at the 

 top, which are situated just below the bifurcations. In 

 their most fully developed state they are only slightly 

 raised, and have a number of tubes projecting from the 

 surface. I have referred the Alecto retiformis, mihi, to 

 this species, though Smitt makes no mention of the ana- 

 stomosing habit, which is so characteristic of the British 

 form. D'Orbigny's Filisparsa incrassata may be the same 

 thing ; but his brief description leaves much room for doubt. 



Habitat. On shells from moderate depths to deep water. 



Localities. Salcombe Bay, on a valve of Pecten max'i- 

 mus ; Cornwall, on Pinna, from deep water ; Scotland, 

 also on Pinna (T. H.) : Guernsey ; Shetland (A. M. N.) . 



Geographical Distribution. Bohuslan, in great 

 depths ; Spitzbergen (Smitt) : Nova Zembla ; Kara Sea 

 (Stuxberg & Theel) . 



Stomatopora deflexa, Couch. 



Plate LVII. fig. 4. 



TuBULiPORA DEFLEXA, Couch, Corn. Faun. iii. 107, pi. xix. fig. 4. 



PusTULiPORA DEFLEXA, JohnstoH, B. Z. ed. 2, 279, ? pi. xlviii. fig. 5 : Hinckg, 

 Devon Cat., Ann. N. H. ser. 3, ix. 306 (50 sep.) ; ? Heller, 

 Bryoz. Ad. M. 49 (Pusltdopora) : Sunk, B.M. Cat. iii. 22 : 

 Jolief, Bryoz. d. cotes de France, 94 (not E7italophora 

 deflexa, Smitt, Flor. Bryoz.). 



Zoariwn in great part adherent, somewhat flattened, rather 

 sparingly branched, minutely punctate ; branches linear, 

 expanding very slightly upwai"ds, the extremities free, 

 erect, subclavate, with waved tubes projecting from all 

 parts. Zocecia slender, disposed in pairs along the 

 creeping portion of the zoarium, and semialtcrnate or 

 distributed alternately, the oral extremity free, bent 

 upwards, and projecting considerably. Ooecia (?). 



The form here described, which is common on stones 



