68 BULLETIN OF THE 



Fig. 10 b. The same. Spicula from the inner part of tlie cocnenchyma : e, one of 

 the sliort rougli spicula ; y', one of the chibshaped forms ; 5', one of 

 the larger fusiform spicula. Enlarged luO diameters. 



PLATE II. 



Fig. 1. Stenogorgia casta V. Part of a specimen. Natural size. 

 1 a. The same. Part of a branch. Enlarged 4 diameters. 



1 b. The same. Spicula : c, d, longer and shorter fusiform spicula ; e, a slen- 

 der fusiform sj)iculum from the polyps. Enlarged 75 diameters. 



2. Primnoa Pourtalesil V. One of the branches. Natural size. 



2 a. The same. Two of the calicles. Enlarged 24 diameters. 

 2 b, 2 c. The same. Two of the scales from the sides of the calicles. En- 

 larged 75 diameters. 



2 d. One of the opercular scales. Enlarged 75 diameters. 



2 e. One of the scales of the coenenchyma. Enlarged 75 diameters. 



3. Eunicella gracilis V. Part of a branch. Enlarged 4 diameters. 



a, one of the club-shaped spicula of the external layer ; b, one of the long 

 fusiform spicula of the coenenchyma, inner portion ; c, one of the double- 

 headed forms. Enlarged 150 diameters. 



" 4. Das'jgorgia Agassizii V. A segment of the stem with a branch. Enlarged 

 2 diameters. 



" 4 a. The same. One of the calicles. Enlarged 24 diameters. 



" 4 b. The same. Spicula. Enlarged 150 diameters. 



" 5. Dasygorgia spiculosa V. One of the terminal calicles with tiie distal part 

 of a branchlet showing the great development of the spicula. Enlarged 

 12 diameters. 



" 6. Chrysogorgia Desbonni D. & M. One of the calicles from a West Indian 

 example. Enlarged 12 diameters. 



" 6 a, 6 b. The same. Two of the spicula of the coenenchyma. Enlarged 75 

 diameters. 



" 7. Iridogurgia Pourtalesii V. One of the calicles and segment of a branch 

 from the proximal portion. Enlarged 6 diameters. 



" 7 a. The same. Two of the largest spicula of the calicles. Enlarged 50 

 diameters. 



PLATE III. 



Figs. 1, 1 a, 1 b. Acanthogargia armata V. Three branches, all from the same 



specimen, showing the extreme variations in the form of the calicles. 



Enlarged 4 diameters. From an alcoholic specin)en. 

 " 2. The same. Terminal branches of a normal specimen. About one half 



natural size. 

 " 2 a. The same. One of the calicles, from a dried specimen. Enlarged 4 



diameters. 

 " 2 b. The same. Spicula: c, c/, e, spines from the margin and upper part of 



the calicles ; /, g, two fusiform spicula from the coenenchyma. Enlarged 



22 diameters. 



