442 Deep-sea Trawling off the S.W. Coast of Ireland : 
The ‘Challenger’ is reported to have collected the species at 
“St. 46”? and off Tristan d’Acunha; but, as the following 
measurements show, the specimens so determined by Prof. A. 
Agassiz are much more depressed and have a much longer 
periproct and a larger anus than the specimen from the 
Bergen Museum. 
Diam. of Height of Diam. of Diam. of Diam. of 
test. test. mouth. periproct. anus. 
Bergen specimen .. 62 49 21 15 6 
Tristan d’Acunha.. 70 30 20 20 10 
StAG AY TAS eet, 65 5 20 18 8 
If other specimens diverge as widely from a fairly typical 
example as do those determined by Prof. Agassiz, we are a 
long way yet from getting either a consensus of opinion or 
accuracy In comparison. 
I will, with the aid of Mr. Highley’s pencil, do my best to 
let my fellow-students understand what I mean by young 
specimens of Z. elegans, and J add the following measurements, 
as they will be of use :— 
Diam. of Height of Diam. of Diam. of Diam. of 
test. test. mouth, periproct. anus, 
tape, aks) 8-5 775 55 3 
Ge foe i) 9 75 6 2°5 
li. g3, Jb 8 55 2 
ivan 2 55 6 2 
The spines have the appearance of being broken at their 
tips; the longest I have found are on tests ii. and iv., on each 
of which there is a spine 12°5 millim. long. With regard to 
the broken look of the spines, it is to be noted that the figure 
illustrative of Diiben and Koren’s paper illustrates the same 
point, and that it is also to be observed in the well-preserved 
specimen from the Hardangerfjord already mentioned. 
Spatangus purpureus, O. F. M. 
‘l'wo specimens, of moderate size, from 50 to 60 fath. 
Spatangus Raschi, Lovéa. 
A fine series from 100 to 180 fath., showing how very con- 
siderably this species varies, so much so, indeed, that one is 
almost inclined to suspect that it forms hybrids with S. pur- 
pureus. In the latter the primary spines are, as is well 
known, much longer, stronger, and more prominent than the 
