0. DORYICUTHYS. 185 



radiating ridges. Length of the snout equal to the distance of the 

 front margin of the orbit from the root of the pectoral fin (in young 

 examples). Origin of the dorsal in advance of the vent, which is 

 midway between the root of the caudal and the gill-opening. 

 Celebes. Known from young specimens only. 



a. One of the typical specimens, 2| inches long. Manado. From 

 Dr. Bleokcr's Collection. 



14. Doryichthys pleurostictus. 



Microphis pleurostictus, Peters, Monatsber. Ak. Whs. Berlin, 18G8, 

 p. 278. 



D. 30-32. Osseous rings 18-19 + 23-24. 



Edges of the shields smooth. Lateral line uninterrupted, passing 

 into the lower edge of the tail. Operculum without or with a very 

 indistinct ridge. Snout half as long as the head. Origin of the 

 dorsal fin in advance of the vent, which is somewhat nearer to the 

 gill-opening than to the root of the caudal. Caudal fin well developed. 

 A brown band along the side of the head through the eye. 



Fresh waters of Luzon. 



a-e. Adult (90 millims.) and half-grown. Presented by Prof. Peters. 



15. Doryichthys dumerilii. 



Doryichthys dumerilii, Kauj), Lophohr. p. GO. 



D. 34. Osseous rings 18-|-24. 



Edges of the body distinctly toothed, with a long spine on the end 

 of each ring. Lateral line uninterrupted, passing into the lower 

 edge of the tail. Operculum with a distinct longitudinal ridge, and 

 three radiating lines underneath. Length of the snout equal to the 

 distance between the anterior margin of the orbit and the root of the 

 pectoral fin. Dorsal fin standing on eight rings, two of which belong 

 to the body. Length of the tail equal to the distance between the 

 vent and the middle of the snout. {Kaiip.) 



Hah. ? The typical specimen is in the Paris Museum. 



16. Doryichthys sculptus. 



D. ca. 30. Osseous rings 20 + 24. 



This species is comparatively much shorter than its congeners. 

 The edges of each ring are prominently spinous behind. Lateral 

 line uninterrupted, passing into the lower edge of the tail. Snout 

 not quite half as long as the head, slightly turned upwards ; head 

 half as long as the trunk. Operculum with numerous prominent 

 radiating ridges. The depth of the body is at least equal to the 

 length of the postorbital portion of the head. Vent behind the 

 middle of the dorsal fin, which stands on seven rings, five belonging 

 to the trunk. Vent midway between the end of the giU-covcr and 

 the root of the caudal, which is very short. There are five distant 



