200 SYNGNATHID^. 



Ifi. Hippocampus mohnikei. 



Hippocampus mohnikei, Bleeker, Verh. Ak. Wet. Amsterd. 1854, i. 



p. 16. 

 ? Ilippocampus monikei, Kaup, Lophobr. p. 8. 



Dorsal fin with thirteen rays ; ten (or eleven)* body-rings ; tu- 

 bercles moderately developed ; coronet rather low ; tail with five 

 broad white bands across the back and sides. (Blkr.) 



Japan. 



If the number of dorsal rays be correctly stated, it appears to be 

 the chief character known at present by w^hich to disting-uish this 

 species, which has been described from an example 60 millims. long. 

 I formerly believed I had recognized this species in two specimens 

 from Zanzibar ; but since I have consulted Bleeker's original de- 

 scription, I do not think that this determination is correct. 



17. Hippocampus hystrix. 



Hippocampus histrix, Kaup, Lophobr. p. 17, tab. 2. fig. 5. 



Dorsal fin with seventeen or eighteen rays. All the tubercles 

 are developed into long, slender, acute spines. Snout slender, as 

 long as the distance of the front margin of the orhit from the first 

 nuchal spine. Liglit-coloured, with numerous white dots ; snout 

 with broad dark rings, each spine black at the tip. 



Zanzibar ; Japan. 



a-h. Two and a half or three inches long. Zanzibar. From 

 Lieut.-Col. Playfair's Collection. 



18. Hippocampus erinaceus. 



Dorsal fin with eighteen rays, standing on four rings, two of 

 which belong to the tail. AU the tubercles are developed into long, 

 slender, acute si)ines. Supraorbital spine as high as the orbit, and 

 a single (parietal) spine in front of the coronet, which is rather 

 elevated, terminating in five spines. Snout shorter than the distaTice 

 of the front margin of the orbit from the gill-opening. Breast-spines 

 double on each side. Eleven body-rings. 



Habitat ? 



a. Two and a half inches long (bleached). From the Haslar Col- 

 lection. 



* Bleeker, having a single specimen, says 10 or 11 ; Kaup states 10. 



