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 



test. test. 



Bergen specimen . . 62 49 



Tristan d'Acunha . . 70 35 



St. 46 65 30 



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 E. elegans^ and I add the following measurements, 

 as they will be of use : — 



The spines have the appearance of being broken at their 

 tips ; the longest I have found are on tests iii. 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 Diibcn and Koren's paper illustrates the same 

 point, and that it is also to be observed in the well-preserved 

 specimen from the Hardangerijord already mentioned. 



Sjyatangus purpureus, O. F. M. 

 Two specimens, of moderate size, from 50 to 60 fath. 



Spatangus Raschi, Loven. 



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 



