PROTO PEDATA. 39 



Proto pedatum. Desmarest, Consid. sur Crust, p. 276. 



Leplomera pcdatu. Gosse, Mar. Zool. p. 131. fig. 224. 



Leptomera i^data. Latreille, Regne An. iii. p. 51. Guerin, 



Iconogr. Crust, pi. xxviii. fig. 3. Milne 



Edwards, Hist, des Crust, t. iii. p. 109. 



Kroyer, Nat. Tidsk., iv. p. 607, pi. vii. 



figs. 13-23. Desmarest, Consid. sur Crust. 



p. 276, pi. xlvi. fig. 3. 

 SquUla ccaudata (Female). Gronovius, Act. Helv. p. 439, pi. iv. figs. 8, 



9, 10. 

 SqiuUa venlricosa. Muller, Zool. Dan. pt. ii. p. 20, pi. ivi. figs. 



1, 2, 3. 



The animal is long, linear, cylindrical, and smooth, the 

 head being intimately soldered with the first segment of 

 the body. The eyes are small and round. The superior 

 antennae are about half the length of the animal ; the 

 flagellum being as long as the last two joints of the 

 peduncle. The inferior antennas are about half the 

 length of the superior, the flagellum being about half the 

 length of the peduncle. The first pair of legs are small, 

 having the hand acutely triangular, tapering to the finger. 

 The palm is as long as tlie posterior margin, and armed 

 with two or three rows of minute spines, its limit being 

 defined by a sharp process, carrying one or two spines. 

 The second pair of legs are at a considerable distance 

 from the first, and situated near the middle of the second 

 segment of the body. They are as long again as the 

 first, and the hand is about twice as long and broad as 

 that of the preceding pair. It is of a narrow oval form, 

 having the palm more than half the length of the hand, 

 defined by a sharp process, furnished with a small, stout 

 spine ; it is excavated near the posterior limit, is wavy 

 throughout its length, and armed with small processes 

 tipped with spinules.* The third pair of legs are feeble 



* Dr. Johnston describes two varieties of this species — the first having the 

 hands oval, with a single denticle at the liase, the head rounded in front, 

 and the branchial lamellse large and elliptical (to which the figures of Miiller 



