PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [NOT. 5, 



times, during the development of the polyzoarium, and that this bi- 

 furcation is the principal cause of its rapid enlargement. These 

 openings are almost all of the same size, and are a little more than 

 half a millimetre in diameter. One may generally count seven in the 

 breadth of a centimetre. 



12. Retepora ? lepida, De Kon. PI. I. fig. 5, 



It is with some doubt that I place this species in the genus- 

 Metepora, because I have been unable to perceive the smallest 

 traces of pores on the single specimen I have examined. It 

 is not impossible that it belongs to Fenestella or to some other 

 closely connected genus. It consists of a kind of very thin fan- 

 shaped network, composed of a great number of small branches, the 

 numerous bifurcations of which enable it to widen rapidly; these 

 small branches, which are all alike, are externally furnished with 

 small, undulated, longitudinal strise, visible only by the assistance 

 of a hand-magnifier. They are connected by means of small trans- 

 verse bars, which are thinner than the branches, and almost per- 

 pendicular to them, but are rarely parallel to each other, and are 

 perfectly smooth on their surface. The fenestrates produced by these 

 intersections are almost all quadrangular, and about as high as wide. 

 The largest are 1 millimetre wide, each way. 



13. Phyllopora? Haimeana, De Kon. PL I. fig. 3. 



The calcareous plate of this species is rather thicker than that of 

 the following, but its shape is almost the same. The openings, with 

 which it is covered, are much larger ; they are circular, and also 

 somewhat funnel-shaped. Their disposition is much less regularly 

 quincuncial ; one can count but 4 or 5 for every centimetre. Only 

 a single specimen is known. 



14. Phyllopora ? cribelltjm, De Kon. PL I. fig. 2, 



This species is formed of a calcareous plate, irregularly undulated, 

 very thin, and pierced with a number of small oval apertures tole- 

 rably regularly and quincuncially disposed ; eight of these apertures, 

 taken on the same line, occupy a length of 1 centimetre. The re- 

 mainder of the surface is entirely smooth. I have seen but a single 

 specimen. 



15. Anomia Lawrenciaisa, De Kon. PL IY. figs. 7, 8, 9. 



This is certainly one of the most curious shells brought from India 

 by Dr. Fleming. This gentleman having expressed a desire to dedi- 

 cate it to Sir H. Lawrence, Chief Commissioner of the Punjaub, who 

 had so greatly facilitated the exploration of the Salt-range, I have 

 hastened to comply with this wish ; and the giving it this name will, 

 at the same time, recall the period of its discovery. 



As is the case with the greater number of its congeners, this 

 species has nothing very regular in its shape. In fact, none of the 

 three specimens that I have been able to examine resemble each 



