Tubipoba. ZOOPHYTA. CELLULIFERA. 529 



EXTINCT SPECIES. 



1. M. ramosa — Dichotomonsly branched, cylindrical ; pores visible by a 

 lens, of unequal size. — Park. Org. Rem. ii. 71. t. viii. f. 3. — Limestone, Will- 

 shire. 



TUBIPORAD^. 



Gen. TUBIPORA. — Tubes cylindrical, erect, parallel, sepa- 

 rate, connected by transverse plates or tubes. 



1. T. catenate Tubes approximate, each emitting from its sides distant, 



horizontal, tubular branches, which enter the surrounding tubes, and unite 



the whole into one irregularly formed mass Mart. Pet. Derb. t. xlii. Park. 



Org. Rem. ii. 13, t. i. f. 1. — Carboniferous Limestone. 



2. T. slrues. — Tubes diverging, bending, united by horizontal tubular 

 branches Park. Org. Rem. ii. 16, t. ii. f. 1 Oolite. 



3. T. ramulosa. — Tubes connected by oblique, dichotomous ramifications. 

 Park, ii 18, t. iii. f. 1. — Carboniferous Limestone. 



4. T. radiatus. — Tubes distant, erect, parallel, striated, and connected by 

 transverse plates, the surface of which is marked with radiated undulated 

 striae — Mart. Pet. Derb. t. 18 Carboniferous Limestone. 



Gen. FAVOSXTES. — Massive, consisting of ascending, pa- 

 rallel, adjacent, prismatical tubes. 



1. F. septosus — Hemispherical, nearly 2 inches in diameter, the tubes ra- 

 diating from the centre irregularly, divided internally by simple transverse 

 plates. — Carboniferous Limestone. 



2. F. depressus — An extended plate, about an inch in height, tubes verti- 

 cal, rather smaller than the preceding, and less divided.— Carboniferous Lime- 

 stone. 



Gen. XLVI1. TUBULIPORA— Branched, cells cylindrical, 

 tubular. 



119. T. serpens. — Stem flat, branches narrow, ascending, 



striated on the back ; the tubes disposed on both sides of the 



front, and united in transverse rows. 



Eschara millepora, Ellis, Coral. 74, t. xxvii. f. E. — Tubipora serpens, 

 Linn. Syst. i. 1271 — Millepora liliacea, Pall. El. 248 — Millepora tu- 

 bulosa, Sol. Ell. Zooph. 136 On corallines, common. 



The whole mass seldom exceeds half an inch in length, or the tenth of an inch 

 in breadth ; the tubes, though usually united at the base, have the orifices 

 free, and even in some cases are disjoined throughout ; a groove, destitute of 

 cells, winds along the middle of the stem and branches ; the colour when re- 

 cent has a purplish tinge. 



120. T. trancata. — Stem round, branched, ending with en- 

 voi,. 1. l 1 



