O 1 



POLYZOA L\FU]S^D1BULATA. 



13. L. Landsborovii, cells Jwrizontal, coalescent, ovate, with 

 thin granulous vmlls, the aperture large, circular, with a deep 

 sinus on the upper margin. Eev. David Laudsborougli. 



Plate LIV. Fig. 9. 



Hah. — On Pecteu opercularis from the coast of Ayrshire, Rev. D. 

 Landshorough. 



Polypidom forming a thin, white, and closely adherent circular 

 crust, of the size of a wafer : the cells rather large, horizontal, conti- 

 guous, ovate, semi-alternate, with the walls thin, glassy, and hyaline, 

 thickly dotted with small perforated granules ; the aperture some- 

 what prominent, oblique, patulous, unarmed, circular, sinuated on 

 the proximal side, and in the centre of this sinus there is usually a 

 small mucro. 



I have dedicated this very rare species to my friend the E.ev. 

 David Landsborough, for many years minister of the parish of Ste- 

 venston, but now the pastor of those of his former flock who are mem- 

 bers of the Free Church of Scotland. He published in 1828, 

 " Arran : a Poem, in six cantos." Edin. 1828, — a very pleasing work, 

 in which the biographer might find easily a correct portraiture of the 

 author's mind and tastes. He is the author of one or more other 

 volumes, and of numerous essays in our religious and Natural History 

 periodicals : and in Natural History has made many interesting dis- 

 coveries, of which this Lepralia is the least. White, of Selborne, 

 has never had a worthier, or more intelligent and more amiable 

 disciple. 



14. L. AURicuLATA, cells coalcscent, short, rhomloidal, hound- 

 ed hy a fine and very distinct line ; the aperture small, circu- 

 lar, p)lain, with an arched sinus on the proximal side. A. H. 

 H assail. 



Plate LIV. Fig. 8. 



Lepralia auriculata, Hassall in Ann. and Mag. N, Hist. ix. 412. 



Hah. — On shells. Trawled up off Bray. Found on oyster-shells 

 from Burnham, Norfolk, A. H. Hassall. On a valve of Pecten max- 

 imus, dredged off Scilly by Mr. MacAndrew. 



Crust white, closely adherent, spreading circularly, with an un- 

 finished lined margin : cells semi-alternate, conjunct, horizontal, 

 swollen a little in the middle, short and quadrangular, or rather 

 rhomboid, well defined by the septa, which form a distinct boundary; 



