NORTHUMBERLAND AND DURHAM. 139 



Family. MEMBRANIPORIDiE, Busk. 

 34. LEPRALIA, Johnston. 



1. L. Brongniartii, And. 



Leiwalia tenuis, Johns. Brit. Zooph., 303, t. liv., f. 2. 

 Lepralia BrongniartUj Busk, CataL, C5, t. Ixxxi., 

 f. 1—5. 

 Rare. On a stone from deep water; Cullercoats. — /. A. 



2. L. RETICULATA, J. MaCQ. 



Johns. Brit. Zooph., 317, t. Iv., f. 10. 

 Busk, CataL, Q>Q, t. xc., f. 1; t. xciii., f. 1, 2; and 

 t. cii., f. 1. 

 On Fusi, Modiolce, and other shells from deep water; not 

 rare. Cullercoats. 



3. L. coNciNNA, Busk. 



Busk, CataL, 67, t. xcix. 

 On Fusus Norvegicus from the deep-water boats ; rare. 



4. L. VERRUCOSA, Esper. 



Johns. Brit. Zooph., 316, t. Ivi., f 3. 

 Busk, CataL, 68, t. Ixxxvii., f. 3, 4, and t. xciv., f. 6. 

 On stones, shells, and the roots of Laminarice, between tide- 

 marks ; frequent. Common at Bamborough. 



5. L. UNICORNIS, Johns. 



Johns. Brit. Zooph., 320, t. Ivii., f. 1. 



Busk in Journ. Micros. So., v. iv., p. 309, t. xvi., f. 



3,4? 

 Lepralia spinifera, Busk, CataL, 69 (part), t. Ixxx., 

 f. 5—7. 

 On the under side of stones in tide-pools ; frequent at Cul- 

 lercoats. Rare in deep water. 

 The beautiful silvery-white variety mentioned by Dr. Johnston 

 is the one usually met with. Professor Busk, who united this 

 species with L. spinifera, in his British Museum Catalogue, has 

 since separated them again in the Journal of Microscopical Science. 



