40 ART. ]. — T. um A : hexactixellida, m. 



expanding tiift of 4-8 (most commonly 7 or 8) terminals, which 

 arise not always in a single circle but sometimes so that one is 

 surrounded by others in a whorl. The terminals are of moderate 

 strength and terminate each with a small star-like disc having 

 5 or 6, minute, marginal teeth ; their surface is obsoletely rough. 

 The general shape of the discohexaster is quite often not unlike 

 that of a floricome. 



In one (Sp. No. 438) of the two specimens, on which the 

 species is based, I find the range of variability of the discohexaster 

 in question somewhat wider than in the other. (PL III., figs. 18- 

 20). In that specimen there are occasionally some discohexasters 

 that are so small as to measure only 50/^ in diameter, while 

 others not infrequently reach up to 88 /^. The terminals are 

 slightly thinner but often, though not always, more numerous 

 (up to 11 in a tuft) than in the other specimen (Sp. No. 230). 

 By the side of such discohexasters rather copiously supplied with 

 terminals, there exceptionally occur others of a comparatively 

 large size such as is represented in fig. 20, in which each principal 

 is seen to bear only 2 or 3 terminals. No such rosette was 

 found in Sp. No. 230. 



Notes on the Soft Parts and the Larva. 



As the specimens were killed and hardened by means of 

 corrosive sublimate, the soft parts are preserved, not so satisfactorily 

 as might be desired, but in a sufiiciently good condition to enable 

 me to make the following observations. 



As in EupledeUa marslialli (Contrib. 1., p. 123), the dermal 



