Species of Eurynome supposed to be undescribed. 549 



Jesse's book is popular, and deservedly so ; I will not, there- 

 fore, attempt to prejudice it: nevertheless, it is the bounden 

 duty of every observer to endeavour to overturn every false 

 position, and to controvert every hasty and unsupported con- 

 clusion. 



[Mr. Conway has communicated, besides, that of the species 

 of birds of his neighbourhood, there are of the species 

 kindred to those he has noted on above, the whinchat, 

 stonechat, hedge-sparrow, and meadow pipit.] 



March 28. 1835. 



Art. IV. An illustrated Description of a Species of Eurynome, 

 supposed to be hitherto undescribed; and Notices of some In- 

 stances of some Change of Form which occurs in certain cited 

 Species of Crustaceous Animals* By S. Hailstone, Jun. Esq. 



Eury'noms [Leach] ? spino v sa [Hailstone] ; ? aspera in a young state. 

 Female. (jig> 47., much magnified.) 



Female. External antennae (b) distant, a little shorter 

 than the rostrum, inserted at the internal corner of the eye ; 

 the first joint rather shorter than the 

 second, the third shorter than the first; 

 the remaining portion of many joints. 

 External double feet palpes (c), with 

 the second joint of their internal foot- 

 stalk emarginate, and notched at its 

 internal corner for the reception of the 

 palpus. Anterior pair of legs thicker 

 than the others, didactyle with deflexed fingers, a little longer 

 than the body, tuberculated, spinous ; 2d, 3d, 4th, and 5th 

 pairs moderately long, with sharp claws and tuberculated 

 thighs. Shell somewhat triangular, anteriorly terminated by 

 a bifid rostrum, with its segments divaricating, which, exte- 

 riorly, are spinous; covered with spines and tubercles, of which 

 ten are more prominent than the others : sides with two la- 

 mellae behind each eye ; the rest of the margin set with spines. 

 Orbit spinous. Eyes thicker than their peduncles. Abdomen 

 oval (apparently 7-jointed, with a longitudinal carina, tuber- 

 culated, and the tubercles occurring in transverse lines : of 

 their character I cannot speak positively, as this part was in 

 so indifferent a state). 



Two female specimens I found in a mass of Filipora filo- 

 grana ; the same which yielded the Pontophilus trispinosus 

 [p. 261-1 tne Hippolyte macrocheles {Hailstone^ p. 394, 395.; 

 Dienecia Wcstwood, sp., p. 552.], the Anceus forficularius 



q q 3 



