Syngnathus. fishes. OSSEOUS. 175 



Gex. XIX. ORTHAGORISCUS. Molebut.— Jaws undi- 

 vided. Body, retrally, as if truncated ; belly smooth, 



32. O. Mold. — Skin rough. Gill-openings oval. 



Mola Salviani, Sibb. Scot. 24 Will. Ich. 151. Bwlase, Corn. 267 



Tetrodon INIola, Linn. Syst. i. 412. — Short Diodon, Penn. Brit. 



Zool. iii. 131 T. ?.Iola, Doii. Brit. Fislies, tab. 25 — Occasionally 



taken in the British seas. 

 Length a])Out 2 feet ; weight about 100 pounds. Body compressed, nearly 

 round, carinated dorsally and ventrally. Back mottled, dusky, belly silvery. 

 Mouth, notrils and eyes, small. Pectorals smaU, of 12 rays. Dorsal and 

 ventral fins produced, opposite, the former of 18, the latter of 16 rays. These 

 two fins are connected witli the caudal fin, which contains 18 lai'ge rays. 

 This species was first observed by Sir Andrew Balfour, in the Frith of Forth 

 (Mem. Balf. p. 80.), afterwards by Willoughby, at Penzance. It has occur- 

 red on many other parts of the coast, itisso states that they are taken at 

 Nice in great numbers, and yield much oil, but the flesh is bad, Ich. p. 61. 



33. O. truncatus. — Skin smooth. Gill-openings semilunar. 



Sun-fish, Borlase, Corn. 2G7 — Oblong Diodon, Penn. Brit. Zool. iii. 129. 

 Tetrodon trun. Don. Brit. Fishes — On the English coast, along with 

 the preceding. 

 Weight from 200 to 500 pounds. Body oblong, more produced than the 

 Mola- Colour on the back mottled, dusky ; on the belly silvery ; dark ver- 

 tical stripes on the sides of the shoulders. Pectorals of 14, dorsal of 12, anal 

 of 15, and caudal of 17 rays. 



Gen. XX. SYNGNATHUS. Pipe-Fish.— Mouth tubular. 

 Gill-openings on the neck. No ventrals. 



I. With Pectoral Jins. 



a. With a caudal fin. 



b. With an anal fin. 



34. S. Acus. — Body heptangular, tail quadrangular. Crown 

 of the head carinated. 



Acus Aristotelis species altera major, Will. Ich. 1 59.— Sea- Adder, Borl. 

 Corn, 267 — Syn. Acus, Linn. Syst. i. 416 Lmtf, Hist.Ork. 181.— Un- 

 der stones near low water-mark. 



Length upwards of a foot. Back brown, spotted ; belly whitish. Scales of 

 the body radiated. Snout narrower than the head, depressed and compi-essed. 

 Dorsal-fin of about 38 rays, with a black line on each side; pectorals 14, anal 

 6, and caudal 10 rayed. 



35. S. Typlile. — Body hexangular ; tail quadrangular ; crown 

 flat. 



Acus Aristotelis, Will. Ich. 158 S. Typh. Linn. Syst. i. 416. Bon. 



Brit. Fishes, tab. 56. — Found along with the former. 

 Pennant, Montagu, and some other ichthyologists, consider these two spe- 

 cies as identical, the ventral carina of the latter being only somewhat indis- 

 tinct. Donovan, however, seems to have pointed out, in the characters of the 

 head, sufficient distinguishing marks. " In all the specimens of Typhle (he 



