THE GEPHYREA OF JAPAN. 70 



I'liiTowed along the midventral lijie. The form of the body 

 ])roper was veiy changeable, but assumed an elongate sac-like shape 

 when preserved. Tlie ground color was a light grayish brown ; 

 the l)ody proper and the greater part of the proboscis were 

 densely marked with bluish black sports, while the lateral arms 

 of the proboscis were of a dirty yellow coloi'. As shown in 

 Fig. 24, a number of slender spine-like bodies 2)rojected from 

 the entire external surface of the worm. 



In the preserved state I have been unable to find the spine- 

 like bodies just mentioned. They had probably fallen oif during 

 tlie killing process ; and judging from a figure of the same, 

 drawn by Mk. Tokunaga, it seems highly probable that they 

 Avere nothing but parasitic organisms. 



Peculiar to this species is the fact that no ventral houk is 

 present and, consequently, no muscular sheath of the same. 



Fig. 103 represents the anatomy of the specimen. The 

 oviduct {od) is a sac lying on the left side of the nerve-cord, 

 and is nearly as long as the body proper and is fully distended 

 by the ripe eggs contained in it. Anteriorl}^ it is greatly narrowed 

 and its wall highly nuiscular, while the remaining parts are, on 

 the contrary, much swollen and very thin-walled. The internal 

 opening or funnel, unlike those in all other previously known 

 Bonellia species, is not situated near the anterior end of the 

 organ, but is found in the posterior terminal portion. The 

 anal glands {ag) are comparatively short and are branched at 

 least three times before ending (Fig. 104). Ten to twenty-five 

 funnels a.)e attached to each of the tertial branches — of course 

 some others being attached directly to the secondary branches. 

 Most of the In-anclies have a fine fixing nuiscle joining them to 

 the bod V- wall. 



