

APPENDAGES. 175 



gated : on the inner surface of its distal end 

 is an oval cushion covered with short curved 

 stiff setae, and notched to receive the point of 

 the lacinia. 



iii. The exopodite or maxillary palp is a five- jointed 

 palp, borne on the outer side of the distal end 

 of the stipes. Its first two segments are short. 



d. The second maxillae are similar in shape to the 

 first maxillae, but smaller. They are fused 

 together in the median plane by their prote- 

 in podites, and together constitute the labium or 

 posterior lip. 



i. The two protopodites are fused in the median 

 plane to form a two -jointed plate. The sub- 

 mentum or proximal segment is the larger of 

 the two, and is very broad from side to side. 

 The distal segment, or mentum, is smaller, 

 and bears the endopodites and exopodites. 

 ii. The endopodites are together sometimes called 

 the ligula. Each is divided into an outer 

 division, the paraglossa, corresponding to the 

 galea of the first maxilla ; and an inner divi- 

 sion, corresponding to the lacinia. 

 iii. The exopodites are three-jointed palps corre- 

 sponding in form and position to those of the 

 first maxillae. The stump supporting each is 

 called the palpiger. 

 The thoracic appendages are three pairs of legs, borne 

 by the sterna of the thoracic segments. They are very 

 similar to each other, but the hindmost are rather 

 the largest. Each leg consists of the following parts : 



a. The coxa is the stout flat proximal piece of each leg. 



b. The trochanter is a very small piece attached to 



the distal end of the coxa. 



c. The femur resembles the coxa in form, but is 



more slender. 



