IO4 Invertebrate Zoology. 



supr a- cesophageal ganglion, from which nerves pass to a pair 

 of minute, pigmented eye-spots. 

 Draw. 



The Reproductive System. The barnacle is hermaph- 

 rodite. The ovaries will be found in the peduncle, the ova 

 appearing as a collection of minute spheres loosely held 

 together. The oviducts pass from the ovaries to the bases 

 of the anterior thoracic appendages, and are difficult to 

 follow. 1 



The testes may be seen through the transparent integu- 

 ment of the body and appendages. Each gland, in alcoholic 

 specimens, appears as a racemose structure of pale yellow 

 color, the lobes extending from a larger antero-dorsal mass 

 into the more anterior thoracic appendages, and into the 

 filaments. 



If the six pairs of thoracic appendages be spread apart, the 

 vasa deferentia will be observed entering the base of the 

 intromittent organ. These ducts will be found to lead from 

 the anterior end of the testis and to unite in the penis and 

 form a common ductus ejaculatorius. 



Make a drawing of the reproductive system. 



1 The opening of the oviduct is on the anterior surface at the point 

 where the appendage joins the body. 



