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THE AMERICAN NATURALIST [Vol. XLIT 



Charles E. Knight, American Museum of Natural His- 

 tory, New York City, was engaged, as has been the case 

 for several summers, in portraying pictorially some fea- 

 tures of the local sea life. Mention may be made in 

 particular of a tiger-shark (Galeocerdo tigrinus), and a 

 dusky shark (Carcharinus obscurus). Of the latter, a 

 specimen over ten feet in length was taken in the labora- 

 tory's fish trap, and was kept alive for a few days in the 

 shark-pool belonging to the station. The lobster, blue 

 crab and scup also received attention, a large canvas 

 being devoted to a group of the last. 



Edwin Linton, Ph.D., professor of biology, Washington 

 and Jefferson College.— (1) Besides examining such 

 fishes as were available among those taken in the fish trap 

 of the Bureau in Buzzards Bay, a preliminary study was 

 made of a large amount of material from fishes and fish- 

 eating birds, collected during the preceding nine months 

 by Mr. Vinal N. Edwards. In agreement with the experi- 

 ence of previous years was the fact that new habitats 

 were found for species already known, and new or unre- 

 corded species were added to the list of those previously 

 known. Thus new species or new habitats were recorded 

 for 21 species of fish. Adult specimens of Tetrarhi/urh us 

 bicolor were encountered for the first time. They were 

 found in the stomach of a dusky shark. Scoleces of this 

 species had, however, been found in this and other hosts 

 during previous years. The pigment which gives the 

 characteristic color to the head and neck of this cestode 

 was not dissolved by the killing fluid (chrom-acetic- 

 formalin), and has not been decolorized by the alcohol in 

 which the worms are preserved. (2) Of the pathological 

 and diseased conditions which were noted, an interesting 

 one is the case of an abnormal growth of the swim- 

 bladder of a scup. This, when first seen, was a slender, 

 white, vermiform object about two millimeters in 

 diameter lying among the muscles of the side. It was at 

 first thought to be a cestode, examples of which occa- 



