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 Fhnders 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 hke 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 E. 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. 



Logs. — 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. 



