ipoint about half way to the stomach. These radiatin?-; bands 

 are not always connected with the circle of white. The eight 

 oral arms are roimded and slender, never argular, with 10 to 

 15 alternate primary branches and numerous secondary ones. 

 The distance from the centre of the oral disk to the tip of an 

 extended arm nearly equals the diameter of the umbi-ella. In 

 the axil of each branch there is a flattened oval or linear 

 vesicle varying in length with the size of the adjoining branch, 

 the length of the eight largest ones (one in the axil of the ; 

 chief branch of each arm) may be one to three centimeters, but 

 many do not exceed the size of one of the oral funnt-ls. There 

 are also 5 to 13 large vesicl'-s on the oral disk, the one in 

 the centre being the longest, sometimes equalling l/4 the di- 

 ameter of the umbrella. L. full gro'vn individuals there 

 are no oscula, or oral ■ .jinels, on the oral disk, except near 

 its margin. Their place is taken by a great number of vei'y 

 :es. 



Comparis on with Other Species. 

 This species is very similar to Cassiopea Andromeda . Esch. 

 and to C. polypoide s^Keller. It differs from the first as 

 described and figured by Tilesius, in the shape of the umbrel- 

 la ; in having' much longer and stouter oral arms, with ten or 



