THE ANNALS 



MAGAZINE OF NATURAL HISTORY. 



[FIFTH SERIES.] 

 No. 22. OCTOBER 1879. 



XXIX. — On the Structure o/'Stromatopora. 

 By H. J. Carter, F.R.S. &c. 



[Plate XV.] 



Having published an article " On the Probable Nature of the 

 Animal of Stromatopora" and another " On the Mode of 

 Gi'owth of Stromatopora, including the Coinmensalism of 

 Caunopora" in which some errors of the former are corrected, 

 I now propose to communicate a third, u On the Structure of 

 Stromatopora." 



By adopting the " commensalism of Caunopora" first 

 noticed by C. F. Roemer, the structure of Stromatopora 

 becomes much simplified, and the general features of the 

 whole group more easily defined ; but it must not be supposed 

 that this structure can be seen with the unassisted eye, al- 

 though higher powers than simple lenses of |-inch to 2-inch 

 focus are detrimental to it, like most other minute fossiliza- 

 tions when in limestone ; nor can it be obtained without 

 much sectioning and as minute dissection as the lapidification 

 will permit. Hence nothing of this kind can be done in the 

 quarry, and much must be obtained from the polished speci- 

 mens of lapidaries ; so that when the collector, previously 

 unprepared in this way, visits the quarry where there may be 

 abundance of specimens, he will be very likely to come away 

 disappointed. 



Ann. & Mag. N. Hist. Ser. 5. Vol iv. 18 



