GEPHYREANS COLLECTED BY PROFESSOR DEAN. 



provided with long spiral lobes. They are all situated behind the ventral 

 hooks. The two brown anal glands (a?) are longer than half the length of 

 the body ; they are without any fixing muscle. Over their entire surface 

 are distributed numerous short-stalked funnels, which are large enough to 

 be detected with the naked eye. The rectal diverticulum of a globular 

 form (rg) is situated on the ventral surface of the terminal portion of 

 rectum, and is fixed to the nerve-cord by a delicate mesentery (w). 



This species seems to stand systematically very near to Thalassema 

 pelhicidum Fischer, which likewise possesses two pairs of segmental 

 organs and separate longitudinal muscles. But the two forms differ from 

 each other in the color of skin, in the number and breadth of longitudinal 

 muscles, and in the absence or presence of the rectal gland. 



