DISTRIBUTION OF TYPES OF CALICLE. 141 



P. Bermuda S (PI. IV. fig. 9). The three rings appear to be complete but the 



skeleton is coarse and very confused. 

 P. West Indies x. 13 (PI. V. fig. 1). The skeleton is open and very perforate, hence 



the surface is much broken up, but septal granules can be made out distinct 



from the wall granules, and about equidistant from the pali as from the latter. 

 P. West Indies x. H (PL V. fig. 2). The wall is zigzag, and raised irregularly ; the 



septal granules are like knobs at the «nds of short stalks projecting from the 



angles of the zigzag ; the internal skeleton variously developed. 

 P. West Indies x. 16 (PI. V. fig. 4). The septal granules are complete but very close 



to the walls. 

 P. West Indies x. 18 (PI. V. fig. 7). The skeleton is open ; the tops of the trabecule 



are like granules over the whole surface ; the three rings very clear ; the pali 



very distinct. 

 P. West Indies x. 19 (PI. V. fig. 8). The skeleton is open, with elements all rather 



thin and perforated, so that at the surface the intracalicular skeleton is broken 



into separate points ; the septal granules thus often form a ring distinct from the 



wall. 

 P. West Indies x. W (PL V. fig. 9). The symmetry is somewhat obscured by a 



tendency to melt down into a network. 

 P. West Indies x. 21 (PL VI. fig. 1). Extraordinary variations in the thickness of 



the elements, following no patterns, but groups of elements of great thickness 



run in streaks across, and independent of the calicle areas, so that parts of 



walls, septa and individual pali may be exceptionally stout, while the elements 



adjoining these patches may be very thin ; the septal granules are distinct from 



walls, and at times even on long wavy stalks. 

 P. West Indies x. 22 (PL VI. fig. 2). The septal granules as very small knobs 



symmetrically arranged just within the slightly raised zigzag wall. 

 P. West Indies x. 23 (PL VI. fig. 3). The septal granules sdem at the surface as if 



broken up into long granulated masses. 

 P. West Indies x. 24- (PL VI. fig. 4). The septal granules are here like granulated 



masses on the wall, there distinct and as if tending to form a ring'; the wall 



thread being here very thick, there very thin. The pali are sometimes joined 



into a stout ring. 

 P. West Indies x. 25 (PL VI. fig. 5). The skeleton is open ; the elements smooth, 



filamentous, and flaky, without showing granulation due to trabecular tips ; the 



positions of the thickenings seem to show that the three rings are complete and 



distinct. 



C. The forms in which the ground plan of the calicles is more or less obscured by the 

 elements being too flaky. 



P. Cape Verde Islands 2 (PL I. fig. 3). The horizontal flakiness of the septa does 

 not disguise the fundamental pattern of the trabecuJse. See also A. 



P. Barhadoes 4 (PL II. fig. 1). The flakes especially pronounced in the walls. 



P. Guadalupe 6 (PL II. fig. 3). Walls are tossed into a flaky reticulum, but this 

 coral appears to belong to D ; the flaky calicles are possibly the result of patho- 

 logical wall proliferation. 



