1 882. J . Zoology. 1007 



Lyncodaphnia macrothroides, sp. n. — Form sub-rectangular, 

 greatly elongated ; length iJ^*^"^ ; height 100*^"^ or less ; first antennae 

 long and slightly curved, bordered behind by about ten spines, 

 and terminating in two or three sword-shaped unequal spines and 

 several sense-hairs, about iS)^"^ loiig \ swimming antennae very 

 slender, as in Macrothrix, 1^^^" long ; head not marked off by a 

 depression from the body, small and extending below into a blunt 

 elevation for attachment of antennae ; labrum rather large ; eye 

 small ; macula nigra conspicuous but not large ; anterior feet 

 strongly armed with curved spines ; intestine anteriorly is fur- 

 nished with coeca, is twice convoluted, broadened before entering 

 the rectum, and opens some distance beyond the anal setae in the 

 heel of the post-abdomen ; post-abdomen rather slender, toothed 

 behind with a double series of about twelve prominences, ciliated 

 near the anus but distally becoming strong, sharp teeth ; ter- 

 minal claws large, curved only at the end, pectinate and bearing 

 near the base a small and large tooth ; eggs much like those of 

 Macrothrix. Male not seen. 



Occurs in Lake Minnetonka, Hennepin county, Minnesota ; 

 rare. — C. L. Herrick. 



ruBLisnED December 12, 18.S2. 



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