THE NAUTILUS. 



with those of the main species. The color of the marsupium is 

 mostly red, more rarely white. 



Gravid females of the variety have been found on Sept. 7, 8, 

 '14; Sept. 16, 17, 21, '15, mostly with eggs, but already on the 

 earliest date a specimen with glochidia was seen. The latter 

 have the same shape as those of the main species, L. 0.18, H. 

 0.09 mm. 



ACTINONAIAS PECTOROSA (CONRAD). (1. C. , p. 569.) 



Anatomy: Ann. Cam. Mus. 8, '12, p. 325 (as Nephronalas 

 perdix). 



Gravid females have been found on Sept. 11, 15, '13; Sept. 

 15, '15; Sept. 17, '12; Sept. 17, '13, all with eggs. Glochidia 

 have been found on May 12, '13, and May 20, ? 14, being dis- 

 charged on the last date. Thus the breeding season is from 

 September to May. 



CARUNCULINA MOESTA (LEA). (See: Toxolasma lividum (Raf.) 

 Ortmann, 1. c. , p. 578.) 



This form is the upper Tennessee representative of C. glans, 

 but I have a set of an absolutely identical form from the Ozark 

 region (James River. Galena, Stone Co., Mo., collected by 

 A. A. Hinkley), recorded by Hinkley (Proc. U. S. Mus. 49, 

 '15, p. 588) as Lampsilis glans, and I shall include these speci- 

 mens in the following report. 



I have described (NAUTIL. 28, '15, p. 142) the anatomy of a 

 sterile female of C. glans. Among the specimens of C. moesta 

 from the Ozarks, there are males, sterile females, and one gravid 

 female with glochidia, collected July 30, ' 14. From the upper 

 Tennessee region, I also have males and sterile females, and a 

 gravid female with glochidia, the latter collected on May 16, 15. 



Thus the breeding season of this form is rather obscure. We 

 should expect it to be bradytictic, and the specimen collected 

 in May would agree with this. However, the presence of glo- 

 chidia at the end of July appears strange; this specimen was 

 discharging, and it might be a case of belated discharge. On 

 the other hand, the beginning of the preceding season can not 

 fall very early in autumn, for among a considerable number of 



