238 THE VOYAGE OF H.M.S. CHALLENGER, 



MADREPORARIA.— I. to XVI. 



Note. — Those figures which represent enlarged views, are marked in the plates with 

 the amount of magnification ; the remainder of the figures are of the natural size of the 

 objects represented. The locality at which each actual specimen figured was dredged is 



given in each instance. 



PLATE I. 



Fig. 1. Caryophyllia Icevicostata. a Mouth of the calicle of the same specimen. Off 



Ascension Island. 425 fathoms. 

 Fig. 2. Caryophyllia clavus, var. transversalis. a Mouth of the calicle of the same 



specimen. Off the Ki Islands. 129 fathoms. 

 Fig. 3. Caryophyllia paucipalata. a Mouth of the calicle of the same specimen. Off 



Culebra Island, Danish West Indies. 390 fathoms. 

 Fig. 4. Caryophyllia communis, a Mouth of the calicle of the same. Lat. 42° 8' N., 



long. 63° 39' W. 1250 fathoms. 

 Fig. 5. Caryophyllia communis. Lat, 37° 24' N., long. 25° 13' W. 1000 fathoms. 

 Fig. 6. Caryophyllia profunda, mass of examples fused together, a Mouth of one of the 



calicles of the same specimen, b Part of the wall of one of the calicles, to 



show the arrangement of the costse. Off Nightingale Island, Tristan 



da Cunha group. 150 fathoms. 

 Fig. 7. Caryopjhyllia lamellifera. a The same enlarged, b Mouth of the calicle. Off 



the Kermadec Islands. 630 fathoms. 

 Fig. 8. Caryophyllia rugosa. a Mouth of the calicle of the same, b Portion of the wall 



enlarged to show the transverse lamellae ujion it, Off the Ki Islands. 129 



fathoms. 



PLATE II. 



Fig. 1 Pleurocyathus brunneus, attached by its side near the apex of its base to a frag- 

 ment of volcanic rock, a The same enlarged, viewed from the side, b Mouth 

 of the calicle of the same, c Portion of the wall of the calicle of the same, 



