«AMMAIirDJE. 91 



i. Ampolisca Gaimardii. (Platk XV. iig. 1.) 



Anipt-lisca Gfiiiimrdii, Knii/er, Voi/tK/e en Scaiid. pi. 2.3*. f. 1. 

 1'ctruiiiiitii.s typiciis, iSnr/ice Bate, lirit. A.ssoc. Itcporf, 1855 ; Si/nojKis, 

 Ann. Nat. 'j/isf. Feb. 1857. 



Jniifi; Hist. Brit. Crust. \\ 171. pi. 10. f. 4. 

 Araneops diadema, A. Costa, JKend. del. Accad. Sc. Nap. p. 171, 1863. 



CVi)halon and percion laterally compressed and dorsally cuneated. 

 rieon compressed, but not cuneated ; the posterior margin of the 

 third segment plain ; a slight dorsal sinus on the fourth. Eyes 

 small and round, one above the other, situated near the base of 

 the superior antenna). Superior antcnnai about one-third the 

 length of the animal ; the peduncle about half as long as the fla- 

 gcUiun ; the first joint of the peduncle short and stout, the second 

 as long again and slight, the third not half as long ; flagellum very 

 slender and delicate, the first joint as long as the last of the 

 peduncle, the inferior margin crowded with auditory cilia. In- 

 ferior antenna; long and slender, as long again as the superior ; 

 the last two joints of the peduncle subequal, reaching beyond the 

 pedimcle of the superior ; flagellum very slender, more than tNvicc 

 as long as the pedimcle. Maxillipeds having a long dactylos, 

 short propodos, long carpus, and the meros furnished with a 

 squamiform plate armed with six stout spines along the internal 

 border. First pair of gnathopoda scarcely subchelate ; propodos 

 short, shorter than the carpus ; palm not defined, slightly concave, 

 furnished with several fasciculi of simple and ciliated hairs ; dac- 

 tylos short, unguicidate, armed upon the inner side with three or 

 four short stout spines fringed with cilia. Second pair of gna- 

 thopoda like the first, but longer ; the propodos much longer 

 and the palm less perceptible. P'irst and second pairs of pereiopodu 

 having the meros long and broad, ovate ; carjius short ; propodos 

 long, slightly arcuate anteriorly, and each joint furnished with 

 long cQiatcd hairs; dactylos long, longer than the propodos, 

 styliform, slightly curved. Third and fourth pairs subetjual, 

 having the dactylos short, curved, directed backwards ; propodos 

 straight, armed anteriorly with a row of equidistant, solitary, bhmt 

 spines, each furnished near the tip with one fine cUium, and pos- 

 teriorly with three somewhat similar ones ; carpus broader than 

 the propodos, and having the inferior extremity furnished with 

 spines similar to those on the propodos. Posterior pair of pereio- 

 podu having the bases long, the iscliium, meros, and carpus short ; 

 projjodos as long again as the carpus ; dactylos Inroad, Hat, and 

 lanceolate. Three posterior pairs of pleopoda stj lifoim : the ante- 



* By n misprint, tlir namo on the pinto is Aiiiprlis^iH. 



