656 



MR. E. E. BEDUAKD OS A 



[May 22, 



width until that segment. The difference in size between the 

 anterior and posterior pairs of the spermiducal glands is clear (spd.). 

 The sperm-sacs (sps.) are to be seen in the xith and xiith segments, 

 a quite usual place for them. 





General dissection of Benhamia budgetii. 

 C< ., gizzard; sps., sperm-sacs ; <//., calciferous glands ; spd., Bpermiduoal glands. 



The intersegmental septa of this worm have the following arrange- 

 ment : — 



The first septum, wbich is fairly thick, marks the anterior end of 

 the anterior gizzard ; the next, also thick, the postei'ior end ; then 

 follows an excessively thin one. Another thin septum marks the 

 posterior boundary of the second gizzard. After this are four 

 closely crowded and also fairly thick septa. The two next, which 

 lie on the posterior boundaries of the xith aud xiith segments, are 



