ÏÜRTHER NOTES OlSf ACAKI. UI 



longitudinally carved Interlamellar hairs near the base of the 

 pseudostigmatical-organs , very small , feathered. 



The abdomen's dorsal surface is fiat, but divided into three 

 depressions by the lateral margins being somewhat bent upwards 

 and by two longitudinal folds of the skin , or ridges ; these two 

 ridges become inconspicuous forward and gradually pass one into 

 the other hindward by bowing towards the median live. Three 

 pairs of transversal ridges segmentally arranged divide the two 

 lateral depressions into smaller parts, imperfectly, for they neither 

 attain the longitudinal ridges nor the lateral margins, except probably 

 the hindmost pair of ridges. From the hindmost part of the longi- 

 tudinal ridges towards the outer corners of the abdomen two 

 other ridges run. In my specimen there is still another ridge, 

 viz. (see my fig. 1.) in the right depression, which we do not 

 observe in the left depression. 



I believe that these ridges are of no great value , and that they 

 will disappear the more the animal is fed. But I have no material 

 to settle this question. 



I have carefully examined the dorsal surface on hairs. The lateral 

 margins bear 4 hairs. The fore-margin 4 smaller hairs , or 6 if you 

 include the two foremost marginal hairs. The distance between 

 these 6 hairs is different , as our figure clearly shows. The place 

 of the hairs is exact in my figure , for I have used the camera 

 lucida. On the outside of the two longitudinal ridges we observe 

 3 pairs of smaller hairs, and near the two fourth marginal hairs 

 a very small hair is scarcely perceptable and directed forward. 

 The hinder edg(.' of the abdomen bears two apophyses with a strong 

 hair, the proximal end of which is smooth, the distal and greater 

 part is provided with pi'otuberances , which give to the hairs a 

 feathered aspect. The ventral part of the animal projects behind 

 the hinder edge of its dorsal surface, and shows two quadrangular 

 apophyses bearing two hairs each, of which the outer are smaller 

 than the inner ones. All the hairs are feathered. 



The ventral surface of the animal (see fig. 3) shows us the 

 epimera, touching one another on one side, the epimera of both 



