94 



cristae of tail; median cristae of trunk rectilinear, 

 ending in the male on the 31"^ tail-ring; in the 

 female on the end of the i6tli or the anterior 

 half of the 17th tail-ring '). Head nearly 8 times 

 in length and more than twice in trunk. Snout 

 about equal to postorbital part of head and twice 

 the length of the diameter of eye. It rises gently 

 and obliquely to the front, is in its lowest part 

 about as high as diameter of eye, has the dorsal 

 profile slightly concave, and has a median keel 

 ending on interorbital space. There are traces of 

 a keel on occiput and nape and of feeble supra- 

 orbital ridges. Operculum with a keel on anterior 

 third, from which radiate faint lines. Length of 

 caudal equal to that of eye. Lighter or darker 

 brown. Ventral surface with lighter or darker 

 cross-bars, corresponding to the rings, especially 

 on trunk, where these cross-bars are also extended 

 on the sides. Dorsal surface with more or less 

 conspicuous dark bands, far distant from each 

 other. Length 58 mm. 



Habitat: Island Karakelang!; Island Sali- 

 babu ! ; Ambon ! ; West coast of New Guinea !. 



On coral reefs. 



14. Nannocampus Giinther. 



(GUNTHER, Cat. Brit, Mus. VIII. 1870. p. 178). 



Body rather short; tail equal to or longer than 

 head and trunk. Shields with transverse lines, 

 their edges obsolete ; intermedial shields (scutella) 

 large, oval. Superior, and as far as known also 

 the inferior cristae of trunk and tail continuous; 

 median cristae of trunk rectilinear, ending below 

 dorsal. Head short, without ridges, finely granu- 

 lated. Snout extremely short, about equal to 

 diameter of eye, thick. Operculum without keel; 



Fig. 39. 



Nawiocamtit'! ^) ^^ ^^^ occasion to state this arrangement which is very 



iveberi Duncker. conspicuous and the correctness of which was doubted by Duncker 



X 3- in four female and 4 male specimenn of 4 different localities. 



