238 AMPIITI'OnA NORMALIA. 



cephalon, second as long as the first, third but slightly shorter 

 than the second ; flagellum scarcely longer than the last joint 

 of the peduncle. Inferior antennce longer than the superior; 

 peduncle scarcely shorter than the superior antennae, ha\ing the 

 penultimate joint longer than the ultimate ; flagellum a little 

 longer than the last joint of the peduncle. Gnathopoda subequal : 

 first pair having the propodos ovate, palm oblique, imperfectly 

 defined by a lateral obtuse spine and armed Avith a few hairs ; 

 dactj-los long, internally serrated : second pair ha\-ing the propodos 

 ovate, pahn convex, oblique, imperfectly defined by a shai-p lateral 

 spine and armed with short cilia ; dactylos arcuate, internally 

 serrated. Third pair of pereiopoda short, fom-th and fifth longer 

 than the third. Antepenultimate and penultimate pairs of pleo- 

 poda with a strong sharp spine upon the inferior distal extremity 

 of the base ; posterior pair ha%-ing the base short, not longer than 

 the rami, rami not reaching beyond the extremity of the preceding 

 pail' ; inner ramus subfoliaceous, tipped with a small tooth or blunt 

 spine ; outer terminating in two hooks. 

 Length ^ an inch. 



Hah. South Australia. 



The coloui- of the animal, as well as can be ascertained by examina- 

 tion of a dried specimen, appears to have been green, spotted all over 

 with small black, irregidar blotches, which are thickest along the 

 dorsal siu-face, but gradually decreasing, until they disappear from 

 the lower margins of the coxae. 



8. Amphithoe Desmarestii, n. s. (Plate XLI. fig. 8.) B.M. 



Eyes ovate. Superior antennae half as long as the animal, having 

 the flagellum clean, slender, longer than the peduncle, each 

 articulus increasing in diameter towards the distal extremity, 

 where it is about one-third as broad as long. Inferior antennae a 

 little shorter than, the superior, hispid ; peduncle a little longer 

 than the peduncle of the superior ; flagellum as long as the last 

 two joints of the peduncle. Gnathopoda subequal: first paii' 

 having only the inferior margin fringed with hair ; mcros infe- 

 riorly produced to a tubercle anteriorly directed ; carpus having 

 the upper margin broken by an indentation, from which spi'ings a 

 short sharp spine, and having the infero -anterior extremity slightly 

 produced; propodos long-ovate, as long again as broad; palm 

 oblique, imperfectly defined by a lateral spine ; dactylos almost 

 straight, inner margin serrated : second pair having the propodos 

 ovate, the upper margin furnished A\'ith four or five fasciculi of 



