837 



MILLEPORID^E. 



MILLEPORID/E. 



S33 



'/ 



FacMitea Gotltlandica. 



a, >i, two specimens; t, nuclei of the tubes; d, tubes magnified; e, portion 

 fa vertical section. 



It is a genus of Defrance, including one recent and three fossil 

 npecies from the Cretaceous and Tertiary Strata. Ex. L. turbinata. 

 (De Blainv., pi. 68, f. 4.) 



Theonea. Animals unknown; cellg rather large and deep, sub- 

 polygonal, accumulated irregularly, prominent on the tumid or angu- 

 lated face of the polyparium, which is fixed, irregularly lobed, and 

 more or leas lacunose between the accumulations of pores. Ex. T. 

 clathrata. (Lamouroux, pi. 80, f. 17.) From the Oolite of Caen. 



Aptenderia. Animals unknown ; cells sub-polygonal, small, porifortn, 

 irregularly disposed, occupying the upper and external edge of sinuous 

 ridges, smooth on one side, plaited on the other ; polyparium globular 

 or hemispherical, diverging from the base to the circumference. It 

 is a genus of Lamouroux, from the Oolite of Caen. Ex. A. dianthus. 

 (De Blainv., pi. 59, f. 2.) 



Terebellaria. Animals unknown; cells small, oval, sub-trigonal, 

 quincuncially arranged on the surface of the polypaiium, which is 

 composed of short conical apparently twisted branches. 



This beautiful coral, thus characterised, is found in the Oolite of 

 Caen, and, it is believed, also abundantly near Bath. Perhaps only 

 one species is known, which Lamouroux divides into two. Ex. T. 

 ramotiuima. (Lamour., pi. 82, f. 1 , a.) 



Pdagia. Animals unknown ; cells sub-polygonal, close, irregular, 

 occupying the convex edge of numerous vertical ridges, disposed in a 

 radiating form, and either simple or dichotomous on the upper surfac i 

 of the coral ; polyparium free, fungiforrn, excavated and lamelliferous 

 above, convex, pedunculated, and circularly wrinkled below. Ex. P. 

 clypeata. (Lamonr., pi. 79, f. 5, 6, 7.) From the Oolite of Caen. 



Polytrema. Animals unknown ; cells poriform, polygonal, irregular, 



TerebeUaria ramosissima. 



unequal, numerous, occupying the knotty branches of a small fix< d 

 polyparium. It is a genus of Risso. Ex. P. miniaceum. (De Blaiuv., 

 pi. 69. f. 4.) 



2. Cells rounded, poriform. 



OrbitoKtei. Animals unknown ; polyparium a regular, orbicular, 

 discoid, cellular, cretaceous mass ; cells in two layers, sometin es 

 apparent externally, and especially at the margin, which is thickened. 



It is a genus of Lamarck, apparently founded upon an internal con 1. 

 One recent European species, and several fossils from the Chalk ai d 

 Tertiariesof Europe, are mentioned. Ex. 0. complanata. (De Blainv., 

 pi. 72, fig. 2.) 



Maryinopora. Animals unknown ; cells poriform, excessively small, 

 round, close, situated hi the narrow tortuous folds of the circumfer- 

 ence of the polyparium, which is free, irregular, discoid, thickened at 

 the margin, and concentrically striated on both surfaces. (ProbaMy 

 an internal coralline plate.) Ex. M. vertebralis. (Blainv., pi. 69, f. 6.) 



Stromatopora. Animals unknown ; polyparium hemispherical or 

 sub-globose, formed of alternately solid and porous adherent super- 

 posed layers. 



The character is from Goldfuss, the author of the genus. The cells 

 are very small, the external surface concentrically wrinkled. The 

 species are fossil in the Transition Limestone, &c., of the Eifel, 

 Siluria, Dudley, &c. Mr. Lonsdale has described a new species similar 

 to a Nummulite in figure. Ex. S. concentrica. (Goldfuss, ' Petrifacta 

 Europje,' tab. 8.) 



Stromatopora concentrica. 

 a, surface reduced ; I, vertical section reduced; c, portion highly magnified. 



