122 



PHYLUM TROCHELMINTHES 



tennae, and the single or paired eyes, which are not present in all 

 forms. 



The male reproductive system consists of a large testis, two or 



.Bristle of 

 C orona 



Ciliary Rim. 



Dorsal 



Antenna 



Ciliated Area.\ 



Retractors of 

 the Corona 



fsophagus 



Ciliated Area 



CiJ 



A'u clei of the 

 yolk Gland 

 Ciliated 



Area 

 Lateral 

 Antenna' 



Intestine 



Sensory 

 ,:~; Bristle 



Brain 



\\..A/astax 

 '^^V^^'\\ Masticatory 

 j;. \/V' Apparatus 



%\ j--'\ Gastric Gland 



cJJ — '^ \ Retractors of 



■r^ \ •• the Corona 



^ , • -r \ — Stomach 



^^^■^^r?. >>^- .. . \ . Foot Retractor 



£y.cretory Tube 

 Lateral 



/JC I Antenna 



fji. '-•■Contractile 



Bladder 

 __ _ Foot Retractor- 



Y!^.— - -ji^- -Cloaca 



■//'-■■■ Cloaca 



Fig. 51. Diagram of a Rotifer. Brachionus rubens Gosse. (After Wesenberg-Lund.) 



four so-called prostate glands, a well-developed vas deferens, a large 

 seminal vesicle, and a protrusible penis. 



Males of most Rotifera are relatively short-lived and quite 

 degenerate. In some species no traces of the digestive glands and 

 mastax, prominent in the female, are found. The rudimentary 



