226 



TBANSACTIOlSrS OF THE 



[1892 



gathered true oceanic hydroids from the shells of oysters 

 taken from the York only a few miles below West Point 

 (cf. 4, p. 108). This fact leads us to look for our hydroid 

 in the upper Chesapeake proper at least as far south 

 as the mouth of the Severn. The most southerly land- 

 ing of the Bay (and the only one), which I have had. an 

 o^^portunity to examine with care, is that at Plum Point. 

 .^ov. 2, 1891, Mr. H. W. Britcher, of the Johns Hopkins Uni- 

 versity, and myself made a thorough examination of the older 

 supports of the outer end of the landing, with a negative 

 result. As already suggested (p. 220) this does not signify 

 that the colonies were not present here earlier in the season. 



In July, 1890, Mr. N. H. Darton, of the U. S. Geologi- 

 cal Survey, and myself rowed down the Pamunkey from 

 a point opposite Hanover Court House, to West Point. 

 At that date I did not suspect the presence of our hydroid 

 in the estuary of this river. But if its water is usually as 

 clear as it was at that season, which I judge, from the 

 proverbial clearness of the York, to be the case, I should 

 expect to find colonies very near the head of the tide, 

 twenty miles above West Point. 



Early in the past summer, Miss Agnes H. Eppes, of the 

 Appomattox Plantations, City Point, Virginia, caused the 

 docks in the James at that town to be thorouffhlv exam- 

 ined for Cordylophora, but with a negative result. Early 

 in the present month, Richard Eppes, Jr., and myself 

 made another search with the aid of my hand dredge, 

 with the same result. I have never yet found the colo- 

 nies in water which, like the James in this vicinity, 

 does not support barnacles. I can see but one reason why 

 the water of the James should not support Cordylophora 

 (as well as Balanns), at least as far up the river as the 

 mouth of the Appomattox, viz. : it appears to carry fine 

 sediment in suspension for a comparatively long period 

 after freshets. Judffino- from what I have seen of the 



