52 



with a strong median longitudinal complete keel, ventrally 

 radiating from it; a second and sometimes a third longer or 

 shorter strong keel and numerous fine and somewhat arbores- 

 cent striae. Head 6^/5 to nearly 9 times in total length, 3 — 4 

 times in length of head and trunk. Snout, the upper profile 

 of which is slightly concave, about equal to postorbital part 

 of head and more than twice as long as eye, with a median 

 ridge ending before the eyes. Laterally with a straight ridge 

 and above it a second one, which ends curved below eye. 

 Orbital ridges, beginning before nostrils, are continued on the 

 postorbital part of the head, and may be continuous with the 

 superior cristae of the body. A low median, slightly scalloped 

 ridge (crista nuchalis) begins behind the eyes and is continued 

 to the second body-ring. Tail conspicuously longer than trunk 

 and head together; trunk one and a half times in length of 

 tail. Anal before middle of total length. Light brown, a dark 

 band interrupted by white crossbars on the snout runs through 

 the eye and the operculum, where it has white points. It is 

 continued on the body, where it is interrupted by a series 

 of black spots, one on each ring, enclosed in or alternating 

 with white patches. A light ocellus with dark border on each 

 caudal ring along its ventral margin, or the caudal rings have 

 alternating white markings. Length 98 mm. 



Habitat: Buru (in a stream near Kajeli, in fresh water!); 

 South New Guinea (Lorentz river, in fresh water!). 



4. Doryichthys retzii (Blkr.). [Fig. 22, p. 49]. 



Syfii^nallius Retzii Bleeker, Act. Soc. Sc. Indo-Neerl. I. 1856, Vischsoorten 



Menado en Makassar, p. 76. 

 Microphis caudatiis Peters, Monatsber. Akad. Berlin (1S68) 1869, p. 276. 

 SyngnatJiiis Retzii Dumeril, Hist. nat. Poissons II. 1870, p. 562. 

 Mic7-ophis caudatus Dumeril, 1. c. p. 591. 



Syngnathus retzii Giinther, Cat. Brit. Mus. VIII. 1870, p. 175. 

 Doryichth\s caudatus Giinther, I.e. p. 182. 



Microphis caudatiis Jordan & Seale, Bull. Bur. Fisheries XXV- (1905) 1906, p. 214. 

 Doryichthys caudatus Giinther, Fische d. Stidsee Bd. III. 1910, p. 432. 

 Syngnathus Retzii Max Weber, Siboga-Expeditie, Fische, 1913, p. III. 

 Doryrhatuphus caudatus Max Weber I.e. p. 116. 

 Doryichthys Retzii Duncker, Mitt. a. d. naturh. Mus. Haml:)uvg XXXII. 191 5, p. 50. 



D. 34 — 40; A. 3 — 4; p. 16 — 19; C. 8 — lO; Rings 16—17 + 

 28— 31 ; subdorsal rings i — 2 + 7 — 8. 



Shields transversally striated, their edges finely serrated when 



