73 



darker with a blackish longitudinal streak or the colour is 

 light yellow with black points on the snout, a blackish net- 

 work on the head and faint cross-bars on about each second 

 ring formed by blackish rings between each pair of edges. 

 Length 61 mm. 



Habitat: Java (Samarangl); Island Binongka!; Timor 

 (Kupang!). 



All the specimens were caught on the surface of the sea. 



Note. The above description is based on young specimens 

 of which the fullgrown form is not yet known. They cannot 

 belong to Corythoichthys fasciatus (Gray) as DUNCKER (Mitt, 

 a. d. naturh. Mus. Hamburg XXXII. 1915, p. 73) thought 

 probable. We had the opportunity to compare with the above 

 described specimens about thirty juvenile specimens ofC.fas- 

 ciatus of the same or somewhat smaller or larger size. They 

 show the same form of snout, the dorsal profile of which does not 

 yet rises abruptely, but gently, to the orbital region. This is 

 therefore indeed a juvenile character, but the young ones of 

 C. fasciatus do not show the slightest trace of the sharp 

 serrature of all the edges of head and body and operculum, 

 which is so characteristic of C. crenulatus. Besides C. crennlatus 

 seems to be a true pelagic species. At least, all known speci- 

 mens were caught in surface nets partly with the help of 

 electric light. 



3. Corythoichthys corrugatus (M. Web.) '). [Fig. 32, p. 74]. 



SyngnatJms corrugatus Max Weber, Siboga-Expeditie, Fische. 1913, p. 112. 



0.32; P. ca. 15; Rings 15 +42; subdorsal rings 1+7. 



Body rather stout, the ventral crista prominent, heptagonal. 

 Tail tetragonal, more than 2 ! / 2 times as long as trunk. All 

 the shields corrugated as also the head ; all the edges on head 

 and shields prominent and finely serrated or corrugated. Inter- 

 medial shields (scutella) wanting. Head 10 times in length; 

 nearly three times in length of trunk. Snout short, one third 

 longer than diameter of eye and slightly shorter than post- 

 orbital part of head; its dorsal surface deeply concave, abrup- 

 tly rising to orbital part of head, which is prominent. Median 



i) We are not sure about the generic position of the single specimen we possess. 



