376 Dr. F. Meinert on the Campodese, 



the back and sides, touching or even lapping over the lateral 

 margin of the corresponding ventral shields. The last three 

 rings are destitute both of these appendages and of the sacs. 

 The sexual orifice is behind the eighth ventral shield, in a conical 

 protuberance, which is simple in the male, but in the female 

 almost bifid. The ninth and tenth rings are closely united, but 

 have, as already stated, each its own independent set of mus- 

 cles, the tenth ring accommodating besides the tensors and 

 flexors of the long cerci. Behind the posterior margin of the 

 tenth dorsal shield a triangular pointed appendage is seen pro- 

 truding, which is the anal plate mentioned above in the descrip- 

 tion of Japyx, and which here, too, is too small to prevent the 

 anus from opening through the extremity of the tenth ring. 

 Below the anus two similar, but shorter, appendages are ob- 

 served. 



The whole animal, particularly the upper side, has numerous 

 setse, some of which are large, subdivided and disposed in rows 

 round the body ; each ring has one such row, and the last ring 

 has two of them. On the fore part of the animal the laciniated 

 setae lie tolerably close to the body; but those on the last six 

 rings stand out from the body almost perpendicularly. 



The long many-jointed filiform cerci, which rise from the last 

 abdomen-ring, possess round each joint, or at any rate round 

 those nearest the base, a row of a few such laciniated setse. 

 The cerci break ofi" very easily, wholly or in part, and the joints 

 are not always very distinctly separated from each other ; it is 

 therefore difficult to indicate the number of joints and relative 

 length of the cerci; in those of the Danish specimens, however, 

 I have usually counted from eleven to fourteen joints. 



Spiracles are only found on the thorax-rings ; the largest are 

 those of the prothorax, which are situated on the underside far 

 behind, almost on the sides in the extreme margin of the pro- 

 sternum. The two other paii-s of spiracles are smaller, circular, 

 and situated on the upperside behind the dorsal shields of the 

 second and third thorax-ring. 



The three ganglia of the thorax are proportionally narrovv^ ; 

 but I have not had an opportunity of examining the rest of the 

 nervous system sufficiently. 



The digestive tube is straight ; and the duodenum reaches 

 from the second or the third thorax-ring to the middle of the 

 eighth abdomen-ring. There are no Malpighian vessels ; but 

 the lower end of the duodenum is, in Campodea, surrounded by 

 a circle of about sixteen rather large glandular cells. 



The ovaries and testicles consist of two undivided, long and 

 wide tubes, opening, as already stated, behind the eighth ventral 

 shield. 



