342 Annals of the Carnegie Museum. 



marsupium with black pigment. Glochidia rather large, suboval 

 (see Lea, Obs., VI, 1858, pi. 5, fig. 14, as novi-eboraci, and Ortmann, 

 191 lb, pi. 89, fig. 20). Length 0.22; height 0.28 mm. 



In all other respects like the foregoing species. Inner lamina of 

 inner gills entirely connected, but in one case a small hole at posterior 

 end of foot has been observed. 



Eurynia (Micromya) vanuxemensis (Lea). 



Two gravid females were donated by B. Walker. They are from 

 Shoals Creek, Lauderdale Co., Alabama, and were collected by H. H. 

 Smith on November 3, 1909. 



On the inner edge of the mantle in front of the branchial there are 

 ten to fifteen cylindro-conical, rather large papillae, irregular in size, 

 standing rather close together upon a sightly dilated part of the edge. 

 This part is not very long, but longer than the branchial opening. 

 Farther in front, the dilated part narrows suddenly, and becomes 

 smooth. A rather broad black band accompanies the papillae. The 

 marsupium occupies one-half or a little more of the outer gills, with a 

 very small non-marsupial section at the posterior end. Ovisacs 

 large, nine to thirteen, their ends marked with brown pigment. 

 Glochidia as usual in this group. Length 0.22; height 0.28 mm. (see 

 Plate XX, fig. 6). 



All the rest of the soft parts like those of the preceding species. 



Eurynia (Micromya) picta (Lea). 



Soft parts of two gravid females from the South Fork of the 

 Cumberland River, Burnside, Pulaski Co., Kentucky, were received 

 from B. Walker. 



Upon the edge of the mantle in front of the branchial there are 

 numerous, crowded, irregular, subcorneal papillae. The posterior ones, 

 close to the branchial, are small, and increase in size forward, then stop 

 suddenly, and beyond this there are a few very small ones, until 

 finally the edge of the mantle becomes smooth. The papillae do not 

 reach the middle of the lower margin. Marsupium formed by a little 

 less than half of the outer gill, with a small non-marsupial section 

 behind. Ovisacs ten to fourteen, with black pigment at ends. Glo- 

 chidia as usual. Length 0.22; height 0.27 mm. (see Plate XX, fig. 7). 



All other parts like those in the foregoing species. 



