MITES OF LOWER ANIMALS. 53 



line, which is regarded as the eye. Then follows the ne,ck, with 

 several red points on the ventral side. 



The anterior feet, which are as long as the breadth of the 

 animal, diminish in size towards their free extremities. Each 

 foot has four joints. Each of the first joints bears a pretty long 

 hair, the third two shorter ones, and the fourth three hairs, a 

 sharp, curved, horny claw, and a sucking disc upon a tolerably 

 long three-jointed stalk, for which reason the feet have been 

 referred to as composed of six joints. Of the posterior feet of 

 the male the outer third pair is as long as its body, and as strong 

 as one of the anterior feet with a sucking lamina. The hairs 

 with which this pair of feet is beset are extraordinarily long and 

 strong. The inner (fourth) pair is very short, and weaker than 

 the third pair, without sucking discs, but furnished with a pair 

 of long hairs. On the abdomen we find the anus between two 

 verrucose tubercles, strongly clothed with hair. The male gene- 

 rative organs also appear to lie in the vicinity of this. 



The females, which are far more abundant, only differ from 

 the males in their size and in the structure of the two posterior 

 pairs of feet. The female is about one third longer ('") than the 

 male. The two posterior pairs of feet are attached to the belly, 



Fig. 2. 



V 



af, as in the last figure ; g, the anus. 



close together, of equal length and strength, but shorter and 

 weaker than in the male. The external (third) pair of feet has 

 two long, terminal hairs, but no sucking disc; the internal 



