8. STIGMATOPHORA. 189 



deeper than broad, only tne dorsal ridges being somewhat pro- 

 minent. Operculum without keel. The length of the trunk (with- 

 out head) is only two-fifths of that of the tail. Dorsal fin standing 

 on thirteen rings, four of which belong to the body. Pectoral and 

 caudal fins well developed. Two series of small round, black ocelli 

 along the side of the trunk. 

 ? East-Indian archipelago. 



a. Female, 130 millims. lon^. From the Collection of Dr. van Lidth 

 de Jeude. 



Although I have not observed the presence of ova on the trunk in 

 this species, I cannot doubt its pertinence to Coelonotus, as it is very 

 closely allied to IF. liaspis. In both the operculiun is crossed by a 

 series of pores. 



3, Coelonotus argulus. 



Syngnathus argus, Peters, Monatsher. Ak. Wiss. Berlin, 1862, p. 685 



(not Hichards.). 

 Coelonotus argulus, Peters, I. c. 1855, p. 465, and Flussfische v. Mos- 



samb. p. 106, taf. 20. fig. 4. 



Evidently most closely allied to C. biocellatus. 



D. 42. 'Osseous rings 17-1-38-39. 



The length of the head is contained twice and two-thirds in that 

 of the trunk ; the length of the snout is one-third of that of the 

 head. Head with very slight ridges above ; body slightly com- 

 pressed, deeper than broad, only the dorsal ridges being somewhat 

 prominent. Operculum crossed by a feeble keel for two-thirds of 

 its length. The length of the trunk is only two-fifths of that of the 

 tail. Dorsal fin standing on eleven rings, three of which belong to 

 the body. Pectoral and caudal fins well developed. ' Two series of 

 small round black ocelli along the side of the trunk. (Ptrs.) 



Streams of St. Johanna. 



Dr. Kaup, in notes to Hemithylacus liaspis, mentions examples 

 from Madagascar in the Paris Museum ; it is a question whether 

 they really belong to that species or, perhaps, to the present. 



8. STIGMATOPHORA. 

 Stigmatophora, Kaup, Lophobr. p. 52. 



Body depressed, with the ridges obsolete, those of the trunk being 

 continuous with those of the tail ; shields covered with soft skin. 

 Pectoral fin developed, caudal absent, the tail tapering to a very 

 fine point. Dorsal very long. Males with a caudal pouch formed 

 by cutaneous folds. 



Australia. 



1. Stigmatophora argns, 



Syngnathus argus, Richardson*, Proc. Zool. Soc. 1840, p. 29, and 

 Trans. Zool. Soc. ill. p. 183, tab. 7. fig. 2. 



* Dr. Kaup refers to the ' Voyage of the Erebus and Terror ; ' but I do not 

 find this name in that work. 



