264 



JOHANNA M. DIECKMANN. 



TABLE I.* 



SHOWING PRESENCE OF SPERMS AND SIZE OF OVA IN Gyrinophilus 

 FEMALES AT VARIOUS MONTHS. 



(The males have no sperms in the vasa deferentia from approximately 

 June I to September 15.) 



In the following table (i) signifies that the cloaca, or ovary, was not available 

 for examination; (2) that, although the ovary was not available, the ova were 

 recorded as "minute" at the time of capture of the animal; (3) that two animals 

 of the same size were captured on the same date, and gave identical findings; 

 + that the tail of the animal was broken, and the actual length was greater than 

 that given. 



1. The smallest animal in which sperms or large ova were 

 found, measured 13.5 cm.; therefore, only animals of this size 

 and larger were considered in studying the question of mating 

 and ovulation. In smaller animals (12.0 and 13.3 cm.), the 

 spermatheca, though well developed, was found perfectly clean 

 and free from debris. 



2. The presence of sperms in the spermatheca does not depend 

 upon season, for they were abundant in June, August and 

 November specimens (one in each month), moderate or scanty in 

 July, scanty or absent in September, and absent in some animals 

 in every month in which any specimens were captured. 



*Two additional animals have been examined, both killed in May. The first, 

 measuring 15.3 cm., was captured and killed May 2d. Ova measured i.o mm., 

 yolk was scanty, sperms were absent. The second was longer than 15.0 cm., and 

 was killed May 3rd after two weeks of captivity with a male. Ova were minute, 

 yolk absent, and sperms absent. 



