SI 2 POLYZOA INFUNDIBULATA. 



16. L. PUNCTATA, cells siib cylindrical^ formyiinous, the punc- 

 tures obscurely roimd transversely, the aperture roundish^ uneven, 

 with 3 or 4 obsolete denticles on the rim. W. Bean. 



Plate LV. Fig. 1. 



Lepralia arenacea, Bea7i MS. — Lepralia punctata! Hassall in Ann. and Mag. Nat. 

 Hist. vii. 368. pi. 9. fig. 7. — Lep. pedilostoma, Couch Corn. Faun, iii, 113. pi. 22. 

 fig. 14. 



Hah.— On rocks, and sometimes on old shells, between tide marks ; 

 not uncommon. 



Crust tliin, greyish or, when young, silvery- white, entirely adher- 

 ent, with an uneven outline, and formed by the aggregation of the 

 cells, which are arranged in regular series. They are semi-alternate, 

 contiguous, and horizontal ; the walls thin and perforated with nu- 

 merous rather large punctures arranged across the back, the aper- 

 ture roundish, with a rim rendered uneven by three or four short 

 denticles : one of these projects from the centre of the upper lip, 

 while the others are from the sides or lower margin. In most speci- 

 mens there is a triangulate divergent slit or loop on each side of the 

 aperture ; and under the inferior lip we see occasionally a small cal- 

 ceoform tubercle. The lateral apertures appear occasionally in 

 almost every species ; and the labial tubercles are ovaria in an em- 

 bryo condition. 



This pretty species is nearly allied to the Lepralia annulata, and 

 to the Cellepora pertusa of Esper, but distinct from botli of them. 

 In consequence of some discrepancy in our descriptions and figures, 

 it is necessary to mention that Mr, Hassall furnished me with a spe- 

 cimen of his Lepralia punctata, which is represented with from two 

 to four spines on the lower lip of the aperture. Neither Mr. Bean 

 nor Mr. Peach have ever noticed these spines. 



When, from friction or any other cause, the upper wall of the cells 

 is removed, the remainder of this polypidom exactly resembles a 

 crustaceous Flustra with oval cells, bounded by septa, which are 

 bored all round with a series of small punctures. Some of the fossil 

 Fenestellaj appear to be species of Lepralia in this flustroid state. 



17. L. ANNui.ATA, cells urceolotc, puncturcd, the punctures in 

 transverse rows ; the aperture transverse, somewhat bilabiate, 

 plain or armed loitli two spines below shorter than the diameter 

 of the cell. D. LandsLorouofh. 



