72 AiiriliroUA NORJIALIA. 



pcrior antenna; nearly as long as the second ; flagellum scarcely 

 yliortor than the jtedunrle. Second pair of gnatlutpoda Avitlioiit a 

 dactylos. I'ieopoda subecpial in length. 

 " Length three lines. 



" Ilah. Coast of Naples."— Costo. 



7. ANONYX. 



Anouyx, Kroi/er, Grunlaml, Amjipodu ; Tiihkr. ii. p. 25G. 



Superior antenna) short ; the peduncle vciy large at the base, and 

 fiu'uLshcd with a secondary appendage. Mandibles with a smooth 

 incisive margin and no secondary- plate, and ha%iDg an aj^pendage. 

 First pair of gnathopoda subchelate; second pair long, slender, 

 feeble, rudimentary, subchelate. Telson single, squamiform, cleft. 



The genus Anoni/.v was founded by Ki'oyer to receive those Crus- 

 tacea that differ fi'om L)/sianassa in having the fii'st pair of gnatho- 

 poda prehensile. This is the only generic character in which they 

 are separated from each other, and A^ithout examination it is not 

 possible to distinguish one from the other. It is also probable that 

 futiu'o reseai'ch may show this to be only a sexual distinction in some 

 species. 



1. Anonyx longicornis, n. s. (Plate XI. fig. 4.) B.M, 



The central dorsal line slightly caiinated. Third segment of the 

 pleon tnbcrculated at the posterior dorsal mai'gin ; the fourth 

 marked -with a deep dorsal sinus, and elevated posteriorly into a 

 tubercle or bliint tooth. Superior antennae very short, scarcely 

 reaching beyond the penultimate joint of the peduncle of the infe- 

 rior ; the first joint of the pedvmcle of the superior antenna con- 

 siderably produced above into a squamous process, which stands out 

 prominently when the antennte are bent down. Infeiior antennas 

 ha\ing the last joint of the peduncle veiy long, and swelling near 

 the middle beneath ; flagellum having the joints long and slender, 

 reaching beyond the entire length of the animal (each furnished 

 with a calceola). Fii'st pair of gnathopoda long and sHght ; the 

 cari)us longer than the propodos, both cyliudiical : palm short, 

 concave. Second pair of gnathopoda ha^^ing the propodos nearly 

 as long as the cai^pus ; inferior angle produced antcriorl}', almost 

 chelate ; dactylos short. Three posterior pairs of pereiopoda 

 having the bases produced inferiorly, extending bej'ond the 

 ischium, and partly over the meros ; meros broad and angular. 

 Ante- and penultimate pairs of pleopoda ha^ing the rami clean ; the 

 posterior pair are longer, shghtly cui'ved, more so on the upper 



