ZOOPHYTES. 197 



had not their operations been accidentally directed to one side, in 

 preference to the other, its disk might have been round, as in the 

 other specimens figured. The pores are not placed promiscuously, 

 but appear to run in rows between the lamellae. 



Some specimens nearly in the shape of No. 8, have their disk 

 in the form of a cup. Others, which also terminate in a cup, have 

 not a short tapering stalk, but swell out in the middle, like a turnip, 

 or a boy's top. In some of these fossils, found in the oolite on 

 Langton Wolds and near Malton, the edges of the lamellae have 

 a curious striped appearance, being alternately thick and thin; a 

 circumstance sometimes observed in other varieties of these madre- 

 porites. 



Next to the petrifactions now described, we may notice those 

 madreporites which present the appearance of an accumulation of 

 simple madrepores, heaped one above another, or rather growing one 

 out of another. From the disk of one, two or three others arise, each 

 terminating in a single star; and considerable clusters thus formed, 

 are sometimes met with in the oolite, and in the alluvium. With 

 these we may notice the branched corals, which also belong to the 

 oolite, and are found near Malton and at Kirkby Moorside. Some of 

 them have slender branches, about the size of a quill ; in others, the 

 branches are from half an inch to near an inch in diameter. Two, 

 three, or even four brandies, may be found diverging from one stalk. 

 The branches are often striated, the edges of the lamellae appearing 

 around them; and each, when entire, terminates in a single star. 

 Some specimens of branched coral, found in the Malton oolite, re- 

 semble that figured in Parkinson's Organic Remains, II, PI. V, Fig. 

 5 ; but without the cross bands : and coincide exactly with the 

 recent coral represented in the Philos. Trans. (Abridged) Vol. X, PL 

 V, Fig. A. 



3 c 



