Niphargus Kocliianus andN. subtenaneus. 281 



highly interesting. Specimens of Ntpkarffiis occurred in five 

 out of eight wells exaniineil in the vicinity of Lynsted to 

 about three miles westward. 1 could not perceive their relative 

 depths to be a factor in determining the presence of these 

 blind Amphipods, as will be seen by the following synopsis of 

 results : — 



No. 1. — About 120 feet deep. N. suhterraneus fairly nume- 

 rous and from 3 to 13 mm. in length of body. The 

 larger individuals, over 8 mm., were captured in a 

 difterent manner, and I took them to be N. fontanus. 

 Numf'rctus Protozoa were present and Cyclops Jinibriatas^ 

 and also the dead bodies of tlies, beetles, and other insects 

 in scanty numbers. Probably these as well as alga?, of 

 which, however, I secured none, may have provided 

 food. Several blind springtails from the walls were 

 secured. 



No. 2. — About 150 feet deep and | mile distant. Had bien 

 emptied and cleaned the previous year. Only Cyclops 

 Jimbriatus and specimens of a minute diaphanous worm 

 with pink intestines were found. 



No. 3. — Near no. 1, about 60 feet deep, A sprlngtail only. 



No. 4. — About I mile distant, 80 feet deep. What I took 

 to be N. fontanus, Bate, was fairly numerous and about 

 ^ inch long. Five of them measured 9, 10, 10, 13, 

 14 mm. respectively. The Ostracod Cypria ophlhal- 

 mica was here extremely numerous, with eyes as well 

 developed as in a surface specimen. Cyclops jimbriatus 

 and a pseudoscorpion (from wall probably) completed 

 the list, beside various drowned insects. 



"i 



No. 5. — About 1^ mile from no. 1, 160 feet deep or there- 

 abouts, and of very wide diameter. Among much 

 debris only six iV. subterraneus 2 to 5 mm. were taken. 

 Also Cyclops Jimbriatus, two pseudoscorpions apparently 

 the same species as the above, Cypria ophtludmica 

 numerous, and one blind spriugtail. 



No. 6. — About 2^ miles distant, 150 feet deep. Six X. sub~ 

 terraneuSy 2-4 mm. 



No. 7. — Near the former, about 100 feet deep. A few N. sub- 

 terraneus of similar small size. 



