PEROPHORA AXNECTENS. 7 I 



again (.v') are buried in the wall of the organ, undoubt- 

 edly on their way through. 



My reason for thinking that they pass from within out- 

 wards is, that one tinds, as he examines carefull}^ the 

 wall just beneath where one pierces for a little way in 

 from the outside, that there is a slight break in the wall; 

 whereas no such break is found when the body pierces 

 part way into the wall from the inside. 



In many, though not in all, a well defined nucleus is pres- 

 ent. The bands are absent from the smallest ones. I 

 have found them onlj^ in the duodenum and chylific 

 vesicle — never in the stomach itself, where the undoubted 

 jjregarines are found. 



6. REPRODUCTIVE SYSTEM. 



The only point in connection with the reproductive 

 organs about which I need speak relates to their variabil- 

 ity. This applies particularly to the testis. Thus, in 

 fourteen individuals examined in one colon}^, the testis 

 had either one lobe, or one lobe with a trace of a second. 

 In seven others of the same colony it had three lobes. 



In a second colony fourteen individuals were also ex- 

 amined, and in all cases here there were many lobes, so 

 man}' as to make it impossible to count them with certain- 

 tv. Six other individuals of this same colony had a less 

 number, varying from one to four. 



In twelve specimens examined from a third colony no 

 trace of either testis or ovary could be found. And, it 

 should be said, that this entire absence of the genital 

 glands is very common in the species. Indeed, my ob- 

 servations seem to indicate that it is a rule rather than an 

 exception, particularly as regards the fully compounded 

 colonies. I ought to mention here that none of the 

 numerouslv lobed testes have been found in these colonies, 



