Q6 ART. 4. 1. IKEDA I 



wall, but is not accompanied by a mesenterial muscle. The 

 anal glands are long slender tubes, about 20 cm. in length, and 

 are provided Avith small, short-stalked funnels. No rectal gland 

 is present. 



Habitat : The species inhabits shallow muddy bottoms, in 

 deep, somewhat obliquely sunk pits. It occurs together with T. 

 tœnioides in the inlet of Moroiso, close to the Misaki Marine 

 Laboratory. 



THALASSEMA GOGOSHIMENSE, n. sp. 



(Fig. 19). 



The present species (Fig. 19) most closely resembles Thalas- 

 sema mucosum both in color and external shape, with the excep- 

 tion of the facts that the body is much larger and the papillary 

 spots more deeply colored with a dirty green pigment. The 

 dorsal surface of the proboscis is covered with small green 

 spots, while its free margin is colored yellow. The total length 

 is, in the fully extended state, about 15 cm. of which 10.5 cm. 

 appertain to the proboscis ; the maximum width, about 2 cm. 

 Over the surface there are closely strewn moderately large 

 papillae which are slightly larger and more crowded towards 

 both extremities of the body proper. The two ventral hooks 

 of a golden yellow color are found in the usual situation just 

 behind the mouth. 



