788 MB. D. J. scomriELD ox the [June 15, 



Nebela bakbata, Leidy. 



This was the form destitute of spines considered by Leidy to be 

 a varietj' of N. harhata intermediate between the typical N. harhata 

 and N. collaris. It is figured by him on plate xxiv. of the ' Ehiz. 

 of X. America,' figs. 18 & 19. In the Spitsbergen mosses this 

 species was not rare, but nnich less common than the foregoing. 



? Heleopeea peteicola, Leidy. 



In two of the collections specimens of a Heleopera were seen 

 which were covered with flat b'.it irregularly-shaped sand grains 

 and were moreover slightly tinged with violet. I have found 

 the same form in England, even the colour being the same; 

 and I have regarded it as a variety of H.petricola, although it may 

 possibly be a distinct species. 



Pseijdochlamys patella, C. & L. 



Considerable numbers of the empty tests of this minute Arcella- 

 like Khizopod were seen, but very few living animals. 



Aecella aetocbea, Leidy. 



The absence of Arcellas from the collections was a very striking 

 characteristic, and it was not until the examination was nearly 

 finished that a single empty shell of an undoubted Arcella was 

 found. It agi'eed very well with A. artocrea in most respects, but 

 the ring of minute tubercles round the mouth could not be made 

 out, and its diameter was barely^^j". 



Eugltpha alveolata, Duj. 



A few specimens of the spineless form of this species were 

 obtained from three of the collections. 



EuGLYPHA ciliata, Ehrbg. ( = '? E. ampidlacea, H. & L., and 

 E. compressa. Carter). 



In point of numbers this species was as common as Difflicgia 

 constricta, but it was not quite §o constant, being apparently absent 

 from three of the fourteen collections. The great majority of the 

 specimens were destitute of " cils, " only a small number being of 

 the typical ciliated form. The amount of variation in size, outline, 

 shell-structui-e, and amount of compression was very great indeed, and 

 in addition to this many examples presented curious malformations, 

 such as an oblique mouth, notched fundus, &c. 



EtJGLTPHA CBiSTATA, Leidy. 



A rare species, only detected in three of the collections. 



AssuLiNA SEMiNULUM, Ehrbg. 



Another rare species, only seen in two collections. In one of 

 these the animals were quite characteristic, even possessing the 

 peculiar brown colour so well shown by Leidy. The specimen 



