1 Gl? SYNGNATHIDJJ. 



9. Syngnathus alternans. 

 D. 39. Osseous rings 2C + 4J. 



Snout tvv^ice as long as the postorbital part of the head, with alow 

 median ridge above, which simply passes into the suture between the 

 frontal bones. The two nuchal plates with a low median ridge. 

 Supraorbital edge faintly continued on the side of the crown. Oper- 

 culum with scared}' a trace of a keel near its base, and with fine 

 radiating stria). Shields \vithout spines. Lateral line passing into 

 the upper caudal edge. Dorsal fin stawling on tivo hodg- and nine 

 caudal rings. Tail twice as long as the trunk ; pouch on twenty- 

 three caudal rings. Pectoral and caudal fins well developed. Body 

 and tail with fourteen brown c/osa bands, which are as broad as, or 

 broader than, the interspaces. 



Seyolielles. 



a, Male. 71 inches long. From the Haslar Collection. 



10. Syngnathus semifasciatus. 



Leptonotus semis triatus *, Kaup, iMphohr. p. 48. 

 D. 38. Osseous rings 21 + 49. 



Lateral line interrupted. Adult females have the trunk strongly 

 compressed and rather elevated, its depth being one-fifth of its 

 length. The length of the snout is ecjual to the distance of the 

 anterior margin of the eye from the middle of the second body-ring. 

 Head with fine stria), but without ridges. Shields smooth. The 

 leugtli of the body is contained oiace and one-third in that of the tail. 

 Vent below the end of the anterior third of tlie dorsal fin. Caudal 

 fin wcU developed. Ui^per part of the trunk with numerous vciy 

 small, light, dark-edged ocelli, the lower part with a narrow brown 

 vertical bar on each ring. A white stripe, edged Avitli black above 

 and below, runs from the lower part of the snout, through the eye, 

 over the gill-cover. 



South Australia and Tasmania. 



a. Type of the species, female, 9^- inches long. South Australia. 



(Ur. Kaup states that "its origin is not noted," but it is distinctly 



written on tlie label.) 

 h. Female, 8 inches long. Tasmania. Presented by Dr. Milligan. 

 c. Female, 8 inches long. Australia. Presented by Dr. A. Giinther. 



11. Syngnathus blainvillianus. 



Syngnathus blainvillianus, Eydoux 6j- Gervais, in Guh: Mag. Zool. 



1837, vii. pi. 17 ; or Voy. Favorite, Zool. p. 79, pi. 32. 

 Leptonotus blainvillei, Kaup, Lophobr. p. 4G. 



D. 35-37. Osseous rings 20-21-1-50. 



The lateral line passes uninterrupted into the upper edge of the 

 tail. ^lalcs and young females have the trunk of nearly the same 



* Tlio bands are transverse (faxcice), and not longitudinal («(';■;>). 



