Niphargus Kochianus and N. subterraneus. 281 



highly interesting. Specimens of Niphargus occurred in five 

 out of eiglit wells examined in the vicinity of Lynsted to 

 about three miles westward. I 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. subterraneus fairly nume- 

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

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

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

 Numerous Protozoa were present and Cyclops fimbriatuSj 

 ami ulao the dead bodies of tlies, beetles, and other insects 

 in scanty numbers. Probably these as well as algse, 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 been 

 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 

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

 14 mm. respectively. The Ostracod Cypria ophthal- 

 mica was here extremely numerous, witli eyes as well 

 developed as in a surface specimen Cyclops jimbriatus 

 and a pseudoscorpion (from wall probably) completed 

 the list, beside various drowned insects. 



1^0. 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 opktkalmica 

 numeious, and one blind springtail. 



No. G. — About 2 1 miles distant, 150 feet deep. Six N. sub- 

 ten'aneuSy 2-4 mm. 



No. 7. — Near the former, about 100 feet deep. A few A^. suh^ 

 terraneus of similar small size. 



