THE CEPHYREA OF JAPAN. 



71 



THALASSEMA INANSENSE, n. sp. 

 (Figs. 22 & 100). 



A single specimen of this new species was obtained by me 

 (1901) on a coral reef, called Inanse, about three miles off Naha 

 (Okinawashima). It was found under a large and living Mad- 

 reporite mass. The body in the fresh state was about 4.2 cm. 

 long and 13 mm. thick, while the proboscis was about 23 mm. 

 long. The latter appeared to be tubular but laterally expanded 

 at the apex so as to present a bilobed appearance. The body 

 proper was of a bluish violet color, spotted with small, uniformly 

 and closely set papilla of a dirty green color. The proboscis 

 was yellowish gray, edged with brown on the lateral margins. 

 The two very small ventral hooks are bright yellow. 



The longitudinal muscle is continuous. There were three 

 pairs of segmental organs {so, Fig. 100) filled with eggs, the 

 most anterior pair lying in front of the ventral hooks {hk). 

 The organs appear like elongate sacs and are provided with well 

 developed spiral lobes. The anal glands (ag), of a brown color, 

 are remarkably long and reach up to the level of the second 

 pair of segmental organs. Very close to the anterior end they 

 are joined to the body-wall by a slender muscular string. Small 

 funnels with short stalks are sparsely distributed over the surface 

 of the glands. The posterior terminal parts of the rectum are 

 fixed to the body-wall by two muscles, one on each side. No 

 rectal gland is present. 



