Ampldpodan Genus IIyalc/ro?n New Zealand. 3G5 



I\Ioutli-parts with exception of maxillipcds present no 

 abnonnal Ceature.s. The niaxillipeds are of the usual struc- 

 ture in the proximal joints, but the carpus and propod are 

 very greatly dilated, so as to be fully as broad as lon<f, the 

 inner margins being very convex ; the inner part ot the 

 surface of the carpus and the whole surface of the propod 

 thickly covered with long hairs irregularly arranged in trans- 

 verse rows, the longest extending considerably beyond the 

 end of the finger. Tlie linger is much shorter than the outer 

 margin of the propod, it is narrow and tapers regularly to the 

 extremity. The outer margins of the car|)us, propod, and 

 finger are fringed with sette. The carpus is narrowed at the 

 base, and the distal portion of the limb is twisted upon this 

 so as to lie in a plane more or less at right angles to that of 

 the proximal portion. 



First gnathopod with side-))late slightly widened below 

 and produced a little anteriorly ; basis widening distally ; 

 carpus with well-rounded lobe of hind margin fringed with a 

 regular series of setge, which increase in length distally; pro- 

 pod oblong, anterior margin slightly convex, devoid of seiaj 

 except for a tuft at base of finger, posterior margin straight, 

 with a regular row of sette which increase in length distally ; 

 palm slightly oblique, curved, and fringed with setse of 

 Vcirying lengths; finger fitting closely on to palm. 



Second gnathopod with side-plate quadrate; basal joint 

 long ; hind margin a little convex, with a few setse ; anterior 

 margin produced on the outer side into a thin flange, which 

 projects in a rounded lobe beyond the end of the joint and 

 ])rovides a groove for the reception of the propod when 

 reflexed ; ischium with the outer margin similarly produced 

 into a thin rounded lobe; merus and carpus both very short 

 and of the usual form ; propod very large, oval except for the 

 excavation of the palm; anterior nuirgin fairly convex, 

 without seta3; hind margin well develo[)ed, rather longer 

 than palm, which is obliqu-^, deeply concave, broad, both 

 inner and outer margins very concave, and with a regular 

 row of setules ; the surface of the palm itself thin, mem- 

 branous, slightly protruding beyond the firm margins; finger 

 short and stout, narrowing abruptly towards the end, pro- 

 duced at the base on the inner side into a rounded lobe with 

 an irregular thickening beyond ; inner margin of finger 

 with a row of very minute setules. 



Perajopods 1 and 2 as long as percoopod 3, of normal 

 structure. 



Ferffiopods 3-5 increasing slightly in length posteriorly ; 

 basal joint broad, with hind margin very convex and irregu- 



Ann. d; Mag. N. Iliat, Ser. 8. Vol. xvii. 2'j 



