V. -MARINE INVERTEBRATES. 



(EXCLUSIVE OF MOLLUSKS.) 



By JOHN MURDOCH, A. M., Sergeant Signal Corps, United States Army. 



The collections and observations upon which the following report is based were made by the 

 writer and Sergeant Middleton Smith, naturalists and observers, assisted by the other members 

 of the party, especially by Lieut. P. H. Eay, commanding, and Capt. E. P. Herendeen, who took 

 especial care of the dredging and seining operations. 



Collecting was attended with considerable difficulty on account of the short season during 

 which the sea was free from ice, but it is believed that the collection gives a fair representation of 

 the marine fauna of the region. 



It will be seen to be purely Arctic in character, showing many striking points of resemblance 

 to that of Greenland and the Arctic Ocean of the Old World, and offering but little analogy to 

 the fauna of the North Pacific. 



A report on the Medusae observed by the writer, prepared by Dr. J. W. Fewkes, of Cambridge, 

 has been incorporated with the following, which also includes a description of the few fresh-water 

 invertebrates collected. 



The Mollusks have been submitted to Mr. W. H. Ball, of the Smithsonian Institution, who 

 presents a separate report on them. 



NUMBER OF SPECIES COLLECTED OR OBSERVED. 



Pycnogouida 2 



Crustacea 44 



Vermes 20 



Echinoderrnata 17 



Anthozoa 4 



Hyilrozoa 17 



Mollusca 01 



Tunicata C 



Brachiopocla 1 



1'olyy.ou 5 



rorifcra , 3 



.' 180 



136 



