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110 ‘‘ ENDEAVOUR ” SCIENTIFIC RESULTS. 
Chili, a cotype of Mr. Agassiz’s species. The only difference: 
of importance is in the covering of the anal system, which in 
the Chilian specimen consists of fewer and larger plates. 
This may prove to be a good specific character, but only more 
abundant material can determine the point, and meanwhile 
the Australian specimen may best be considered as E. horridus, 
the resemblance in colour, shape and character of the test and 
spines being so very marked. 
The specimen from east of Flinders Island, Bass Strait, is: 
very much smaller, and is of great interest as indicating that 
the extraordinary increase in length of the vertical axis occurs 
only after the individual is half grown. The horizontal dia- 
meter of this specimen is 41 mm. while the vertical is 32 ; 
v.d. is thus a little more than three-fourths h.d. ; the abactinal 
system (8 mm.) and actinostome (7.5 mm.) are relatively a 
little larger than in the adult, but are notably small. There 
are 23 coronal plates, indicating that while the height of the 
test is increasing over 250 per cent., the number of coronal 
plates increases less than 50 per cent. ; obviously the increase 
in height is due to marked increase in size of the coronal plates 
rather than to great increase in number. The colour of this. 
smaller specimen is like that of the adult, reddish with bright 
red primary spines. 
The specimen from off Maria Island, Tasmania, is obviously 
young. It is partly broken, and lacks the abactinal system 
entirely. It is 17 mm. in diameter, with an actinostome 
7 mm. across and has 15-16 coronal plates in each column. 
There are no spines left. The tuberculation of the distinctly 
reddish test is much coarser relatively, if not actually than 
in the older specimens; in particular there are several 
secondary tubercles on each interambulacral plate which are 
very nearly equal to the primary tubercle in size. It is pos- 
sible that this specimen is not a young L. horridus, but when 
locality and depth are considered it seems highly probable 
that it is. The developmental stages of this species would 
certainly be of extraordinary interest, and it is to be hoped 
that at some future day an oceanographic survey of the 
region between Tasmania and New Zealand and between the 
latter country and Chili may bring to light the necessary 
material. Three specimens. 
Locs.—South of Gabo Island, Victoria, 100-250 fathoms. 
East of Flinders Island, Bass Strait, 100-300 fathoms. 
East-north-east of Maria Island, Tasmania, 125-180 
fathoms. 
