ANTHURID^E. 155 



I SOP ODA . A NTH URID^E. 



AVERRANTIA. 



Fam. ANTHURID^E. (Anthurada Leach.} 



THE animals in this family are very long and slender, 

 the head distinct from the pereion, the antennae very short 

 and nearly equal in length, the first pair of legs large 

 and subchelate, the remaining six pairs nearly equal 

 in size and uniform in shape, the pleon furnished with 

 biramose squamose appendages, terminal pair of pleopoda 

 transformed into a pair of scale-like appendages at each 

 side of the terminal joint. 



The head is nearly oval, with the eyes small, oval, 

 formed of hut very few lenses, and placed near the 

 anterior angles of the head, behind the antennae, which 

 are very short and gradually attenuated to the tip. In 

 the figures in page 160, they are represented as they 

 appeared to us under a lens, in the very ill-preserved 

 type of the genus, originally described by Montagu, 

 now in the British Museum. In specimens preserved 

 in spirit of a second species, contained in the Hopeian 

 Collection, the upper pair are placed a little apart at 

 the base, whilst the lower pair, which are the most 

 robust, arises close together, their basal joint being por- 

 rected and brought into contact with each other along 

 their inner edge, thus forming a protection from above 

 to the oral organs. The upper pair of antennae are 

 composed of a three-jointed peduncle and a four-jointed 

 flagellum, the terminal joint furnished with a long pencil 

 of hairs at the tip. The lower, and more robust pair, 

 consist of five joints, of which the second and third 

 are shorter than the first and fourth; the terminal joint is 

 conical, and furnished at its tip with a pencil of hairs. 



