THE ANNALS 



AND 



MAGAZIx^E OF NAT[JRiL HISTORY. 



[FIFTH SERIES.] 



" per litora spar^ite museum, 



Naiades, et eirciim vitreos considite fontea: 

 PoUice virgineo teneros li'ic carpite flores : 

 Floribus et pictum, divae, replete canistruro. 

 At V03, o Nymphae Craterides, ite sub undas ; 

 Ite, reourvato variata corallia trunoo 

 Vellite musco.sis e rupibus, et milii conchas 

 Ferte, Deas pelagi, et pingui coachylia succo." 



N.PartheniiG^ianneffasii Rcl. 1. 



No. 109. JANUARY 1887. 



I. — On some neio or imperfectlij'hnowii Species of Stromato- 

 poroids. By H. Alleyne Nicholson, M.D., D.Sc, 

 Regius Profe.s3or of Natural History in tlie University of 

 Aberdeen. — Part III. 



[Plates I.-III.] 



Clathrodictyon vesiculosum, Nich. & Mur. 

 (PL I. figs. 1-3.) 



Clathrodictyon vesiculosum, Nicliolson and Marie, Journ, Linn. Soc, 



ZooL vol. xiv. p. 2:^0, pi. ii. figs. 11-13 (1878). 

 Clathrodictyon vesiculosum, Nicholson and R. Etheridge, Jun., Mon. 



Sil. Foss. Girvan, p. 238, pi. xix. fig. 2 (1880). 

 ? Stromatopora striatella, M'Coy, British Palaeozoic Fossils, p. 12 



(1851). 



Coenosteum forming laminar expansions, often of large size, 

 having the lower surface covered by a concentrically-striated 

 and wrinkled epitheca. Full-sized individuals may be from 

 6 to 9 inches in diameter and an inch or more in thickness. 

 The upper surface is irreunlarly undulating, without " mame- 

 lons," and exfoliating concentrically round the elevated points. 

 Well-developed astrorhizse are present ; but the central canals 



Ann. & Mag. N. Ili'sf. Ser. 5. Vol. xix. 1 



