SYNOPSIS. 409 



Immediately behind the vent, small and inconspicuous ; 

 tail fan-shaped ; colour pale brown, with transverse bars 

 of dark brown. Linn. Penn. Brit. ZooL, iii. p, 184, 

 pi. 26 ; Yarr. Brit. Fish, ii. p. 432. 



Sp. 204. S. Typlde. Deep-nosed Pipe-fish. Head not raised 

 above the level of the back, snout continued nearly in a 

 line with it, and so deep as to be nearly parallel in the 

 abdominal line : body hexagonal anteriorly ; caudal fin 

 somewhat pointed ; colour olive-green, mottled and spotted 

 with yellowish brown and yellowish white. Linn., Don. 

 Brit. Fi*h., pi. 56 ; Jmyns" 1 Brit. Vert., p. 485 : Yarr. 

 Brit. Fish, ii. 439. 



GEN. XCVIII. ACESTRA. Pectoral, ventral, anal, and cau- 

 dal fins wanting ; abdomen without a pouch under the tail in 

 both sexes ; in other respects nearly as in Syynathus. 



Sp. 205. A. cequorea. Equorial Pipe or Needle-fish. Form 

 slender and elongated, gradually narrowing behind into a 

 narrow tail ; body compressed, an acute dorsal and ab- 

 dominal ridge, and three others, less strongly marked on 

 the sides ; dorsal and vent near in the middle ; colour 

 yellowish, with transverse pale lines, one on each joint, 

 and another down the middle of each plate. Sygnathus 

 asquoreus, Linn., Mont. Mem. Wern. Soc., i. p. 85, pi. 4, 

 fig. 1 ; Penn. Brit. ZooL, iii. p. 188; Yarr. Brit. Fish., ii. 

 p. 442. 



Sp. 206. A. anguinea. Snake Pipe or Needle-fish. Anterior 

 part of the body slightly octangular, the whole body slen- 

 der, the tail very much produced and very narrow ; angles 

 on the surface and a series of transverse plates almost ob- 

 solete , dorsal entirely before the middle ; colour olive- 

 green ; irides red; pupil black. Yarr. Brit. Fish,., ii. 

 p. 445. Sygnathus ophidion, S/iaw's Gen. Zool., v. p. 453, 

 pi. 179. 



Sp. 207. A. ophidion. Straight-nosed Pipe or Needle-fish. 

 Body long, slender, and cylindrical! slightly compressed 

 anteriorly, tail round and gradually tapering to a fine point ; 

 euout short and nearly as broad as the head, the latter of 



