156 



REPORTS ON INVESTIGATIONS AND PROJECTS. 



corals have a strong skeletal structure and either demand or thrive only in 

 pure ocean water. The typical inner flat corals are Mceandra areolata, Side- 

 rastrea radians, Porites clavaria (form with more slender branches), and P. 

 furcata. In areas more or less intermediate in character there may be some 

 commingling of types. In the mouth of South Bight, where the inflow and 

 outflow of water is strong, several reef-patches flourish, which have on them 

 every species noted on the outer reefs except Dendrogyra cylindrus, while 

 in these more protected places the more fragile branching species of Acro- 

 pora especially flourish. 



As has been stated, rough weather prevented planting corals or measuring 

 colonies growing naturally on the outer reef ; but a large plantation was 

 established on the west side of the north end of Golding Cay at the point 

 marked "i" foot in depth on the map, just under the word "Heads." At this 

 place nearly all the species planted are living naturally, and a series of check 

 measurements on specimens growing naturally was made. The specimens 

 planted were weighed wet, then affixed to concrete disks with hydraulic 

 cement and measured ; the disk with the coral attached was weighed and 

 photographed and then planted on an iron stake. The following plants were 

 made: 



List of corals planted on the west side of the north end of Golding Cay. 



Name. 



Dichocoenia stokesi 



Dendrogyra cylindrus ... 



Orbicella annularis 



Orbicella cavernosa 



Favia fragum 



Maeandra areolata 



Mseandra labyrinthiformis 



Maeandra strigosa 



Maeandra sp. not determined.. 



Mussa (Isophyllia) dipsacea 

 (perhaps includes some fra- 

 gilis) 



Mussa (Isophyllia) rigida 



Siderastrea siderea 



Name. 



Siderastrea radians 



Agariciaagaricites 



Agaricia crassa and young 



indet. specimens 



Acropora muricata ( = cervi- 



cornis) 



Acropora prolifera 



Acropora palmata 



Porites clavaria 



Porites sp 



Porites astreoides 



Total 



No. of 

 disks. 



14 

 8 

 8 



15 

 I 

 6 



No. of 

 speci- 

 mens. 



129 



6 



14 



8 



8 



15 

 I 

 6 



135 



This list includes at least 21 species, as usually understood, and perhaps 

 one or two more. Eight of this number are not under observation at the 

 Tortugas, while at that place the series for some of the others are deficient. 

 In some instances the plants have been made to ascertain the effect of 

 changed environment on variation. 



The list of species of naturally attached specimens measured is as follows : 



List of naturally attached corals measured for growth rate, off the west side 



of the north end of Golding Cay. 



The total number of growth records for this locality is 171. 



