79 



3. Snout longer than remaining part of head. Trunk 



with 7 longitudinal series of pearly ocelli . . . S. argyrostictus p. 82. 

 B. Anterior part of dorsal inserted on last trunkrings. 



1. Snout equal to postorbital part of head. Tail 

 twice length of trunk. Dorsal 21 25, rings 



17 + 4 1 S. fasdolatus p. 83. 



2. Snout longer than postorbital part of head. 



Dorsal 30; rings 13 -j- 32 36 S, cyanospilus p. 83. 



3. Snout equal to remaining part of head. Dorsal 



285 rings 15 -j- 42 S. uncinatus p. 84. 



II. Operculum with a rather low keel, restricted to its 

 basal third. Median cristae of trunk and superior cristae 

 of tail subcontinuous (Siphostoma Duncker). 



1. Dorsal 235 trunk nearly twice in tail S. punctatus p. 86. 



2. Dorsal 29 31 ; trunk 1.7 in tail S. pelagicus p. 87. 



3. Dorsal 35 45 5 trunk twice to nearly 2.\ times in tail. S. acus p. 88. 



i. Syngnathus djarong Blkr. 



Syngnathus djarong Bleeker, Verhand. Batav. Genootsch. XXV. 1853, Bijdr. 



Troskieuwige Visschen, p. 22. Nat. Tijdschr. Ned. Ind. VII. 1854^.325. 



I.e. IX. 1855, p. 429. 



Syngnathus Helfrichii Bleeker, Nat. Tijdschr. Ned. Indie IX. 1855, p. 428. 

 Syngnathus spicifer var. rivalis Peters. Monatsber. Akad. Berlin 1869, p. 276 



(fide DUNCKER). 



Syngnathus djarong Dumeril, Hist. nat. Poissons II. 1870, p. 545. 

 Syngnathus Helfrichii Dumeril, 1. c. p. 547. 



Syngnathus spicifer Giinther, Cat. Brit. Mus. VIII. 1870, p. 172 (p.p.)- 

 Syngnathus parviceps Ramsay & Ogilby, Proc. Linn. Soc. N. S. Wales (2) I. 



1886, p. 475- 

 Syngnathus spicifer var. djarong Duncker, Spolia Zeylanica Vol. VII. prt. XXV. 



1910. p. 31 and 32. 

 Syngnathus djarong Duncker, Mitt. a. d. naturh. Mus. Hamburg XXXII. 1915, p. 80. 



D. 2329; A. 23; P. 13 16; C. 10; Rings 1416 -f 3943; 

 subclorsal rings: 2nd 6th O r 3 l< d 8 th caudal ring. 



Very slender; trunk heptagonal; the ventral crista strongly 

 prominent; tail tetragonal. Shields transversely striated, their 

 edges prominent, smooth. Intermedial shields oval. End of 

 median cristae of trunk on the last body-ring strongly deflected 

 to inferior cristae of tail but not united with them. Superior 

 cristae of tail in most cases reaching the first tail-ring. Head 

 about 9 12 times in length, rather low; its profile from point 

 of snout to front concave. Occiput smooth. Snout equal to or 

 slightly longer or shorter than postorbital part of head. Oper- 

 culum inflated, with a complete longitudinal keel from whence 



