14 ARKIV FÖR ZOOLOGI. BAND 7. NIO 5. 



erior portion of the oesophagus there are two oesophageal 

 glands (CE. Gl.) more or less conical in shape; in the type 

 specimen they are almost heart-shaped, but in the Saldanha 

 examples they are more elongate cones. In the three speci- 

 mens examined these glandular caeca are 10 to 11,5 mm. 

 long; they open into the posterior portion of the oesophagus 

 by a tubular stalk about 2 mm. in diameter. 



Tasciilar system. 



The pair of héarts (H.) and the vascular system need 

 not be described in detail, they are on the same plan as the 

 hearts and vessels of A. marina. The first vessel from the 

 gills opening into the dorsal vessel is found in the 12tli seg- 

 ment, that is, the first five gills return blood to the sub- 

 intestinal vessel, the other eight to the dorsal vessel; in 

 A. marina the efferent vessels of the first six gills open into 

 the sub-intestinal vessel and of the last seven gills into the 

 dorsal vessel. 



Nepliridia. 



Five pairs of nephridia are present opening on the fifth 

 to the ninth segments. The nephridium is built on the same 

 plan as that of A. marina. The dorsal lip is fringed with 

 thirty to förty triangulär processes, each attached by its nar- 

 rovver end and having its broader distal margin subdivided 

 into six to eight rounded lobes. The ventral lip is slightly 

 folded but not frilled or ridged, nor is it deeply notched. All 

 the nephridia are about the same size, that is, the first and 

 last do not show any signs of being in process of reduction. 



Goiiads. 



• 



The gonad is microscopie, as in A. marina, and the stages 

 of growth of the reproductive cells found in the coelomic 

 fluid are similar to those seen in the coelom of A. marina. 



Nervöns system and sense organs. 



The brain and nerve cord are apparentl}!- similar to those 

 of A. marina but, as material suitably preserved for histo- 



