ORDER BRANCHIOPODA. 355 



have observed, towards the middle of the fifth pair of feet, and 

 of the four following, a globular body, analogous perhaps to 

 the vesicles which these organs present in the following sub- 

 genus, that of Apus. 



The only known species, Eulimene hlanchatre, Latr. Regno 

 Animal, par M, Cuvier, iii. p. 68 ; Nouv. Diet. d'Hist. Nat. x. 

 p. 333 ; Desraar. Consid. p. 353, 354 ; is very small, whitish, 

 with the eyes and the posterior extremity of the tail blackish. 

 It is found in the river Nice. 



The others, and last phyllopa, AspiDlPHORA, Latr., have 

 sixty pairs of feet, all furnished externally, near their base, 

 with a thick ovaliform vesicle, and the two anterior of which, 

 much larger and branching, resemble antennae ; a large testa, 

 covering the major portion of the upper part of the body, 

 almost entirely free, clypeiform, emarginated posteriorly, sup- 

 porting anteriorly, on a circumscribed space, three eyes, sim- 

 ple, sessile, and the anterior two larger and lunulated ; and 

 two bivalve capsules, enclosing the eggs, and annexed to the 

 eleventh pair of feet. These characters distinguish 



Apus, Sco}^., 



Which form a part of the genus BlNOCULUS of Geoffroy, and 

 of that of LiMULUS oi Midler. 



Their body, including the testa, is ovaliform, broader, and 

 rounded before, and naiTowed posteriorly, in the manner of 

 a tail. But, when we do not include the testa, but consider 

 the body naked, it is at first almost cylindrical, convex above, 

 concave and divided longitudinally by a furrow underneath, 

 and afterwards terminates like an elongated cone. It is com- 

 posed of thirty rings, diminishing much in size towards the 

 postei'ior extremity, and which, with the exception of the last 

 seven or eight, support the feet ; the first ten are membra- 

 naceous, soft, without spines, present on each side a small 

 eminence, in the shape of a button, and have each but one 



A a 2 



