116 "endeavour" scientific results. 



is similar to the latter specimen, the primaries being almost 

 wholly white, though the test is distinctly greenish. The 

 South Australian specimen is the most peculiar, for \\'hile the 

 test is greenish and not very unusual, the primary spines are 

 all pale reddish with light tips ; actinally the hght shade 

 occupies more of the spine than the reddish tint. All the 

 specimens show a zigzag band (similar to that of A. formosus) 

 in the abactinai interambulacra, indistinct when the test is 

 dry but very evident when the surface is moistened ; the 

 markings differ obviously from those of A. formosus, how- 

 ever, by being darker than the intervening angles. 



Doderleini has recently reviewed anew the species of 

 Amhlypneustes, adding another species and a variety to the 

 already perplexing list. He is inclined to doubt the vaHdity 

 of both the present species and the next, considering them 

 forms of A. grisens, but I am unable to agree with him. I 

 confess, however, that I do not believe we have yet reached 

 the truth in regard to the species of this interesting genus. 

 We really have not as yet any clear idea as to the limits of 

 variation in either form, tuberculation or colour, in even a 

 single species, and we zoologists who are thousands of miles 

 from the restricted home of the genus, are thus working 

 largely in the dark in our efforts to identify specimens. 

 Some day a zoologist on the ground, or with a careful and 

 enthusiastic collector on the ground, will secure sufficient 

 material to enable him to work out the actual natural limits 

 of each species. Seven specimens. 



Locs. — East coast of Flinders Island, Bass Strait. 



Between Gabo Island, Victoria, and Disaster Bay, New 

 South Wales, 50-100 fathoms. 



Off Cape Marsden, Kangaroo Island, South Australia, 17 

 fathoms. 



Also two specimens from an unknown locahty. 



Amblypneustes pachistus, H. L. Clark. 



Amhlypneustes pachistus, H. L. Clark, Mem. Mus. Comp. 

 Zool. Harvard, xxxiv., 1912, p. 327. 



These individuals range in size from 31 to 45 mm. h. d.; 

 the height ranges from a little over .80 h.d. in the smallest to 

 a little less than .90 h.d. in the largest. The colour is the 

 same in all : test, pale brown when dry, more nearly olive 



1. Doderlein — Fauna Siidwest-Australiens, iv., 1914, pp. 460-475. 



