Annelida of the Berniudas. 621 



the tentacle, or about twice as long as the breadth of the buccal seg- 

 ment ; lower ones about ^ shorter. The first dorsal cirrus and most 

 of the others on the anterior half of the body are longer than the 

 upper tentacular cirrus and contain 36-40 annuli ; these long cirri 

 are regularly tapered, more or less curled, regularly beaded distally, 

 and equal or somewhat exceed the diameter of the body. Others not 

 more than half as long occur irregularl3\ 



Setoe are all similar, long and numerous, 8-10 in a fascicle, larger 

 than usual in this family, with rather short, wide blades, the ratio of 

 width to length about as 1 : 2|^-3^ ; their tips strongly^ incurved, 

 simple and acute. The posterior setje and acicula are rather larger 

 and longer than the anterior, but similar in form ; two acicula, 

 larger and more yellow than the setae, occur in most fascicles ; their 

 tips are a little blunt or enlarged, and seldom project. Posteriorly 

 there are often one or two simple acute setae. The stems of the 

 compound setae are very oblique at the enlai'ged end, and have a 

 rounded lobe just below the tijj, on the outside. 



The oesophagus is deej) brown, as wide as the stomach and f to f 

 as long, nearly cylindrical, but usually a little swollen in the middle 

 and slightly contracted posteriorly. Its aperture is wide and nearly 

 even, with a narrowly revolute entire margin. There is no anterior 

 armature, but a small, rounded, highly refracting spot near the pos- 

 terior end indicates the existence there of a posterior tooth, which 

 bends inward and forward, with an acute tip, the base being much 

 wider than the tooth itself. 



The stomach is large and long, occupying about 12 segments, 

 cylindrical, pale colored, covered with very distinct and well-sepa- 

 rated roundish or elliptical groups of greenish glandular cells, 

 arranged in about 70 pretty regular rows ; on the posterior half a 

 whitish line ususally runs along the middle of each row, so as to 

 divide the most of the groups of cells into two nearly equal parts ; 

 anteriorly this line, or membrane, runs between the rows. Each 

 glandular cluster seems to rise, with a narrow stem, from the center 

 of a whitish, square or polygonal area, bounded by fine lines. They 

 are arranged so regularly in quincunx that when not much magnified 

 they have a tessellated appearance. Seen in profile the glandular 

 groups are long-pyriform, with a narrow base. Other small irregu- 

 lar groups are scattered between the regular rows. 



The color of the type specimens, in formalin, is yellowish white, 

 with a dark brown oblong spot anteriorly, due to the oesophagus. 



Length of the larger specimens, 20 to 25™™; diameter, 1.4 to 1.6™™. 



In dead corals from the reefs. 



