A. E. Verritt — Comparisons of Coral Faunae,. 199 



EXPLANATION OF PLATES X-XXXV. 



The figures on these plates are reproduced from photographs made by Mr. A. 

 Hyatt Verrill, of New Haven, who has taken unusual pains to bring out the 

 finer details of structure.* The photographs necessarily lose many of the details 

 by this pi-ocess of engraving, but I believe they will show quite as much struc- 

 ture as many of the poorer photographs that are often reproduced by much 

 more expensive processes, and certainly much more than can be shown by the 

 best lithographic plates. Had the requisite funds been available, I should have 

 preferred to have enlarged many of them considerably more, in order to show 

 finer details. 



Plate X. 



Figure 1. — Mceandra, labyrinthiformis (Linne). Top view of a Bermuda speci- 

 men showing both single and double collines of various breadths. In several 

 places it also shows the commencement of the formation of exothecal buds 

 and calicles on the double collines. Natural size. Page 70. 



Figure 2. — The same. Part of a young Bermuda specimen with nearly all the 

 collines simple (var. truncata Dana). About % natural size. Page 72. 



Figure 3. — Part of a young Bermuda specimen with wide double collines (var. 

 Stokesii). On several of the wider places exothecal buds were forming. 

 About % natural size. Page 72. 



Figure 4. — Mceandra cerebrum (Ellis and Sol.) Ver. Vertical section of a Ber- 

 muda specimen, x 3. Page 74. 



Plate XI. 



Figure 1. — Mceandra areolata. Top view of a large Florida specimen, No. 1833c, 

 with sinuous, meandriform valleys and Diploria-like collines ; a, profile 

 view of an attached Facia fragum (young). Slightly reduced (4|J). Page 

 81. 



Figure 2. — The same, Var. confertifolia Ver., nov. Side view of the type, No. 

 1833ft, from Key West, Fla. Natural size. Page 83. 



Plate XII. 



Figure 1. — Mceandra areolata, var. laxifolia Ver. Top view of the type from 

 Florida. No. 1833a. About natural size (If). Page 83. 



Figure 2. — The same. Var. hispida. (Type of Manieina prcerxipta Dana, No. 

 4294.) Top view, slightly enlarged ( x 1%). Page 83. 



Figure 3. — The same. Variety with double collines and cellular exotheca. 

 About natural size (ff). Page 81. 



Figure 4. — Mceandra cerebrum. Top view of a part of a typical Bermuda speci- 

 men. Natural size. Page 74. 



Figure 5. — Mceandra labyrinthiformis, var. Stokesii. Portion of a Bermuda 

 specimen showing the beginning of several exothecal buds, at a, b, c, d. 

 About natural size (11). Page 71. 



* The reproductions have been made by The Gill Engraving Co., New York. 



