202 



Pandarus aldtus. 





W 



Art. III. Illustrations in British Zoology. By George John- 

 ston, M.D., Fellow of the Royal College of Surgeons of Edin- 

 burgh. 



33. Pa'ndarus ala^tus (Jig. 21.). 

 Pandarus aile Milne Edwards in Diet, des Sc. Nat., xxviii. 80. tab. 8. 

 Description. — Body oblong, half an inch in length, two 

 tenths of an inch in breadth ; convex and smooth dorsally ; 

 21 ^_ ^_^ the ventral sur- 



face flat, and of a 

 dead white colour. 

 Cephalothorax * 

 roundish ; with a 

 very narrow mem- 

 branous border, 

 composed of a large 

 middle; three small 

 somewhat trian- 

 gular pieces on 

 each side, and a 

 small square piece 

 behind, sinuated 

 on the lower edge ; 

 the middle piece 

 chestnut brown, 



c, a view of the ventral surface, highly magnified. SCOl'ed with irre- 



gular faint lines, minutely emarginate in front, with a small 

 depression immediately behind this, and an impressed me- 

 dial line on its hinder part ; the front dilated and rounded, 

 having the outer angles terminated by a small three jointed 

 antenna pointed backwards; the apical joint very minute. 

 Inferior surface of the cephalothorax concave, with three 

 pairs of jointed legs f : the first pair with a strongly curved 

 and very sharp claw, placed anteriorly to the spiniform ros- 

 trum, at the sides of which is a pair of jointed small filiform 

 palpi % ; the second pair of legs, situated more towards the 

 margins, longer, more slender, with a bifid obtuse claw, and, 

 at their base, another pair of stouter acutely pointed palpi ; 

 the third pair swollen at the base, terminated with a single 

 acute claw. Behind it there are three pairs of fins L each 



* The test of Latreille, shell of Leach, bouclier cephaltque of M. Edwards, 

 carapace of Desmarest. 



+ Pattes-machoires of Edwards. 



j What we have called palpi are the maehoires rudimentaires of Ed- 

 wards. The posterior palpi are legs in the nomenclature of Leach and 

 others : and this seems correct. 



§ Pattes thoraciques of Edwards, legs of Leach. 



