206 First Annual Report of the 



" 1. Copepod parasites belonging to the genus Trachiastes, or 

 near it: 23 taken from mouth and gills, distributed as follows: 

 2 on upper lip, 3 just back of vomer, 5 on palate just in front of 

 gill arches, 2 on dorsal gill arch, 1 on ventral gill arch, 8 on gills 

 (2 of these on gill rakers). 



" 2. Taenia sp. about 35, taken from serous coat of intestine 

 and pyloric coeca; all small maximum about 25 mm, in alcohol, 

 white, still active when placed in salt solution. 



"3. E chinorhynchus sp. 36 mostly from pyloric coeca, a few 

 from intestine." 



" The fish louse specimens were forwarded to Prof. Charles B. 

 Wilson, State Normal School, Westfield, Mass., who wrote con- 

 cerning them on May 26, 1911, as follows: 



" I find on examining the parasitic copepods from the small 

 mouthed black bass which you sent me that they are Achtheres 

 micropteri, Wright. Another species of the same genus, A. am- 

 hloplites, infests the red-eye, although I have never found them 

 at all numerous, not more than 3 or 4 upon a single fish. 



" I published the complete life history of this last species from 

 studies conducted at Lake Maxinkuckee, Indiana, only a few 

 months ago. I found the free-swimming period of the larva is 

 of remarkably short duration; under ordinary conditions not 

 many of the larvae can find a host within this period and so per- 

 ish. But within the confined area of breeding ponds the condi- 

 tions would be more favorable and nearly all of the larvae would 

 make a ' find.' I know of no way by which to guard against 

 their attacks in such places. 



Very truly yours, 



CHARLES B. WILSON." 



Constantia is one of the best locations for the study of larval 

 worms and copepods which are parasitic on fishes. 



On September 18th a lot of common sunfish were sent by A. J. 

 Conkling, of Matteawan, to the office for examination. The eyes 

 of many of these fish were destroyed by parasitic worms, a con- 

 dition similar to what has been observed at Constantia in the 

 troutperch, yellow perch, pikeperch, black bass, and other 



