160 AMl'IIU'OIiA NORMA 1,1 A. 



differeiu'es in tin suporior antounce, posterior pair of ])lcopo(la. and 

 tolson are eonsideraWe and important. The genus is named in 

 compliment to Mr. (Jos.se, in eonsiderution of his valuable contribu- 

 tions to marine zoology. 



1. Gossea microdentopa, u. s. (Pl.^te XXIX. fig. 6.) B.M. 



Eyes rather large, rounded, black. Superior -antennae about one- 

 third the length of the animal ; peduncle having tlie joints gra- 

 dually decreasing in length, the last carrying two short trurapet- 

 mouth-shaped auditory cilia; flagellum rather longer than the 

 peduncle, every second articulus being inferiorly distally produced 

 and crowned with a few cilia. Inferior antennte (wanting in the 

 only specimen examined). First pair of gnathopoda subchelate ; 

 propodos long, quadrate ; palm slightly convex : second pair smaller 

 and narrower than the first. Pereiopoda subequal. Pleopoda long, 

 slender, styliform, and with a few short spines on the upper side. 

 Telson lanceolate. 



Length -^^ths of an inch. 



Hah. Ilfracombe {Mr. Gosse). 



50. AORA. 



Aora, Krot/er, Tidskr. ser. 2. i. p. 335, 1845. 

 Lalaria, Nicolet, Gai/'s Historia de Chile, iii. 1849. 

 S2}ence Bate, Ann. Nat. Hist. xx. p. 525, 1858. 

 Lonchomeriis, Spence Bate, Brit. Assoc. Report, 1855 ; Ann. Nut. Hist. 

 Feb. 1857. 



White, Hist. Brit. Crmt. p. 180. 



Superior antenna longer than the inferior, and cariying a secondary 

 appendage. Inferior antennae having the peduncle much longer 

 than the flagellum. First pair of gnathopoda much longer than 

 the second, and having the meros produced inferiorly into a long 

 tooth. Third pair of pereiopoda shorter than the first two, fourth 

 much longer than the thii'd, fifth much longer than the fourth. 

 Posterior pair of pleopoda biramous. Telson tubular. 



At first I was incKned to incorporate this genus with Mi era - 

 dentopus ; but the species found by M. Gay on the shores of Chili 

 shows that there is more than one that assimilates in the peculiar 

 characters of the genus. 



1. Aora gracilis. (Plate XXIX. fig. 7.) B.M. 



Lonchomerus gracilis, Spence Bate, Report Brit. Assoc. 1855 ; Ann. 

 Nat. Hist. Feb. 1857. 



White, Hist. Brit. Crust, p. 180. 



Body long, slender. Eyes small, black. Superior antennae nearly 

 as long as the animal, the flagellum being t^nce as long as the 



