318 s. GOTO : 



with a slightly opaque fiuTOW series of five or six (four to seven) round- 

 tipi^ed, fom-sided, often somewhat flattened, stout spinelets, frequently 

 graduated in length toward the adorai edge of plate, or all but the shorter 

 adorai nrnnber subequal. Actinal sui'facB with three to five irregular longi- 

 tudinal series of low granules, those nearest the fiuTOW spinelets being 

 largest. A bivalved pedicellaria is normally present on most of the plates, 

 the jaws being usually wider than liigli, but exceptionally liigher than wide. 

 The gi-anules of actinal smiace of adambulacrals vary greatly in number 

 and those on the outer half are not in very definite series. 



"Madi-eporic body pentagonal, situated one-third distance from centre 

 to inner edge of marginal plates. 



''Anatomical notes. — Anal opening present, subcentral, sm-rounded by 

 thi-ee to six plates larger than those adjacent. Intestinal cœcum large, with 

 eight long, unequal glove-finger-like radiating divisions. Intestine spacious, 

 stomach small; hepatic cœca long, extending two-thirds to tlu'ee-fourths 

 length of R ; quite a sharp distinction between dorsal and ventral divisions 

 of stomach. Gonads very large, bushy, each with fom- short ducts and foinr 

 apertm-es in a hne xmrallel to and a short distance from the tough, imcalci- 

 fied inteiTadial septum. Dorsal muscle bands stout, joining at centre of 

 disk. Each baud gives off numerous lateral smaller branches obhquely, 

 Hke the barbs of a feather, on the side toward margin. Polian vesicles 

 large, one in each iuterradius except that of the madreporic canal; 

 ampuUte double; tube feet with large sucking disks. No superambulacral 

 ossicles. 



"When the plates which bear the tabula are examined from the inner 

 surface of the stout dorsal integument they are seen to be arranged in very 

 regular rows parrallel with the median radial. The radial row and the two 

 on either side have plates with six short, broad, rounded, or truncate lobes. 

 On either side of these the lobes are very soon lost and the plates become 

 circular. All plates are slightly spaced and there are no internal connecting 

 ossicles as in 3Iediaster, Papulœ are single and distributed all over the 

 abactinal sm-face, except in a narrow inteiTadial band reaching toward 

 centi-e of disk as far as the madreporic body; they are absent also at the 



