1911] Michael: Chaetognatha of the San Diego Region. 



59 



The table presents the following generalizations : 



1. As in S. enffata, the ovary and seminal vesicles reach 



maturity at aproximately the same time. 



2. The mature ovary (pi. 5, fig. 40) varies in length from 



1.3 to 2.7 mm. or from 11 to 20 per cent of total 

 length of specimen. 



3. In width the mature ovary varies from 0.22 to 0.35 mm. 



or from 10.5 to 20 per cent of its own length. 



4. The mature ovary reaches the anterior limit of the pos- 



terior fin, the variation on either side of this point 

 being about 4 per cent. 



Ritter-Zahony (1910, p. 256) gives the length of mature ovary 

 in individuals ranging from 9 to 12 mm. as from 1.2 to 1.8 mm., 

 or from 13 to 15 per cent of the total length of the individual. 



TABLE 18 



Measurements concerning the Ovary in Sagitta lyra. 



Ovary remote from maHirity 



