170 STNGNATniDJi;. 



vent. Operculum brown, with a silvery subcentral s2)ot; sym- 

 metrical brown markings on the lowerside of the head. 

 Cocos Island. 



a. Tyjie of S. tetropldhalmus, 61 millims. long. Nova Selma. From 

 Dr. Bleeker's Collection. 



S. andersonii and tetrophthalmus, Blkr., are evidently identical. 

 The long description of the one is merely a repetition of that of the 

 otlier, except with regard to the colours, the specimens named S. 

 andersonii having been more brightly coloured than the type of S. 

 tetrophthalmus. Dr. Bleeker describes the coloration of the former 

 thus : — *' Colore corpore nigricante-violaceo, ventre dilutiore, iride 

 nigricante margaritaceo radiatim striata ; capite margaritaceo macu- 

 late et variegato ; trunco margaritaceo punctulato et ocellato, oceUis 

 lateribiis suturis sitis in series 3 longitudinales dispositis, ocellis 

 scutis trunci 2°, 7°, et 12° in vittam transversam unitis ; capite, 

 dorso caudaquo superne fasciis 11 trans versis margaritaceis, fasciis 

 1" et 2" cephalicis, 3", 4", 5", 6", et 7^" dorsalibus, jJostcrioribus 4 

 caudalibus ; pinnis dorsali roseo-hyalina, pectoraUbus et auali 

 violaceo-hyalinis, caudali nigricante roseo margiuata." 



30. Syngnathus albirostris. 

 Oorythoichthys albirostris, Kaup, Lophobr. p. 25. 



D. 24. Osseous rings 19 + 29. 



Operculum crossed by a prominent straight ridge. Snout and 

 head rather short, the length of the latter being nearly one-third of 

 its distance from the vent. Snout as long as the postorbital part of 

 the head, with a strong, interrupted median crest. Occiput and 

 nuchal plates compressed into a strong crest ; a pair of longitudinal 

 ridges on each side of the occiput. Body with very prominent 

 ridges, rather deeper than broad. Shields without spines. The 

 length of the trunk (without head) is contained once and two-thirds 

 in that of the tail. Lateral line not continued beyond the trunk. 

 Dorsal fin commencing on the anal ring, and occupying four caudal 

 rings. Caudal fin well developed, longer than pectoral. Body and 

 tail with about twelve irregular broad brown cross bands ; the 

 lower part of the head with oblique brown transverse bands. Snout 

 white. 



Mexico, Bahia. 



a. Female, 6 inches long. Mexico. 



I have no doubt Dr. Kaup's statement that the number of body- 

 rings is 12 only is an error. 



31. Syngnathus cyanospilus. 



Synguatlius cyauospilus, Bleek. Nat. Tyds. Ned. Ind. vi. 1854, p. 114. 



mossambicus, Peters, Monatshcr. Ak. Wiss. Berl. 1855, p. 465 ; 



and Flussjische v. Mossamb. p. 104, taf. 20. fig. 3. 

 kuhlii, Kaup, Loj)hobr. p. 34. 



D. 20-23. Osseous rings 13-15-1-33-35. 



