A. K Verrill — Bermudian and West Lidian Reef Corals. 123 



University. It is attached to a stone on which the name and 

 locality (Bermuda) were written in Dana's handwriting. The stone 

 is of granitoid character, but it may have been taken to Bermuda 

 in ballast, as often happens there. It belonged to the Redfield 

 Bermuda collection, which was presented to Yale University many 

 years ago. No. 4298. 



This specimen, owing to its growing upon an angular corner of a 

 stone, is quite irregular in form ; one side is closely adherent to the 

 stone, almost to the edge, while the other side is free from 10 to 

 :55°"», and shows very well the thin lamellate costa?, finely, unevenly 

 serrulate, especially distally where they are highest. They are about 

 one-third as thick as the width of the intercostal spaces. The 

 collines are irregular and crooked ; most of them are double-walled, 

 with a slight groove on top, the walls themselves being thin ; in 

 some places the walls are simple, or nearly so. The valleys are 

 unequal ; most are elongated, deep, and narrowed by crowding ; 

 others are nearly circular and less deep ; the longer ones are 14 to 

 20""" wide, from wall to wall ; the larger circular ones are about 

 24mm bi'oad (in other specimens they are often 30""" broad). 



The septa are ver}^ thin, very unequal, openly arranged ; their 

 edges are irregularly and sharplj' dentate, with long, thin, flat, acute 

 or lacerate teeth, unequal in length and breadth, rough on their sides 

 and ends ; the larger teeth are near the columella There are about 

 six principal septa to a centimeter, with four or five much thinner 

 ones. The columella is open and loose in structure, composed of 

 slender, irregular, rough spiniform ])rocesses from the septa. This 

 coral is 80""™ broad and 49""" high, where thickest (pi. xvi, fig. 1). 



A somewhat younger, turbinate specimen from Bermuda (coll. 

 1901), agreeing very closely with the type in the characters of the 

 septa, dentations, costte, etc., has dee])er and more flaring calicles of 

 somewhat large size, 20 to 30™"^ in diameter. In this the walls are 

 in nearly all cases separate ; they have united partially in some of 

 the collines, leaving a wide furrow, but in two collines they form 

 only a very thin and simple wall, showing that this is a matter of 

 small importance. This specimen was attached by a small pedicel, 

 leaving the lobulated outer wall free for 30 to 35""" all around ; the 

 costiB are thin, high, laminar, and verj^ finely serrulate. (PI. xix, 

 tig. 1.) 



Other regular young specimens, v.hen attached hy a small pedicel, 

 have an imperfect epitheca that covers most of the under side, 

 except within 4 or o™"" from the edge, and the base may be flat and 

 horizontal, circular or lobed. (PI. xvii, figs. 1-3.) 



