Echinodermata, by Prof. F. J. Bell. 433 



species two specimens from 250 fathoms. Dr. H. Carpenter 

 intends to investigate the limits of this species ; it will, I 

 think^ be contrary to what usually happens when questions of 

 this kind are closely studied if he should be led to any other 

 conclusion than that we have here to do with what may justly 

 be called a protean species. The depth recorded is greater 

 than any yet given by 150 fathoms. 



Antedon 2^halangium^ J. MlUler. 



A single specimen from 250 fath. Dr. H. Carpenter gives 

 30-220 fath. as the bathymetrical range of the species. Mr. 

 Green's dredging therefore slightly increases the range. 



B. ECHINOZOA. 



II. ASTEKOIDEA. 



Pontaster tenuisptms^ Diib. & Kor. 



Of this common species several specimens were sent from 

 315 fath. ; " many " were also dredged at ? 250 fath. The 

 finest specimens are unfortunately a good deal injured; but a 

 good series was got, as some of the specimens are quite young. 



Astropecten irregularis^ Penn. 



A number of specimens from various depths, 250, 500, and 

 1000 fath. The species is so variable that it would be unsafe 

 to regard the arrangement of spines, proportion and number 

 of marginal plates, and so on in these examples as in any way 

 characteristic of deep-sea forms. I cannot, indeed, see any 

 special points in them ; but the depths are noteworthy, as 

 j\lr. iSladen has none greater than 374 fath. 



Luidia ciliaris, Phil. 

 Two specimens, from 55 fath. 



Astrogonium Oreeni. (PI. XIX. fig. 4.) 



R=27, r=12-5. 



The curve between the arms is well rounded ; there are 

 seven or eight superomarginal and seven to nine inf eromarginal 

 plates ; those of the upper and lower series do not correspond 

 regularly ; the innermost are longer than wide, one or two 

 about the middle of the row tend to be square, and the more 

 external are wider than long ; the terminal superomarginal 



