56 LOPHOBRANCHII. 



smutty dark brown, with a black caudal having a light border, 

 and rays yellow and speckled. There are traces of cross-bars 

 on the tail. The length of the specimen is 1'85 inch, of the 

 head 039 inch, of the snout 020 inch, of the dorsal fin 0"20 inch, 

 of the tail 0'69 inch, and of the caudal fin 0"04 inch. The 

 height of the body is 0'20 inch, and its breadth on the lateral 

 lines is - 14 inch. 



Rad.— P. 20; D. 22; A. 3; C. 10. 



Genus 3. D0RYICHTHYS. 



Diagn. — The elongated and compressed snout is devoid of 

 spines. Near the gill-cover there are two long thin bones, 

 jointed to the occiput, which include between them a slit- 

 shaped cavity. The four-cornered tail is shorter than the 

 body. 



Descr. — The holes on either side of the occiput above the 

 gills are apparently used to admit water into the interior of the 

 body. Body higher than broad and having spiny projecting 

 borders. As far as the dorsal extends the tail is hexangular. 

 The pectoral fins are broad, but not long ; and the dorsal is long, 

 but not high. The caudal is not much developed, and the anal 

 is as usual merely rudimentary. 



A. The lateral line interrupted near the anus. 



1. Doryichthys bilineatus, Heckel. 



Diagn. — The borders not distinctly toothed. Bod) r -rings 17. 

 The dorsal placed on 6 tail- rings. 



Descr. — The upper border of the snout twice curved and tra- 

 versed by three elevated lines. From the fore part of the orbit 

 to the extremity of the pectoral fin the distance is equal to the 

 length of the snout. On both sides of the medial line the halves 

 of the operculum are striped and scarred. The broad forehead 

 is striated and roughened by raised lines. Two lines in relief 

 proceed from the orbit, and there is one in the middle of the 

 occiput. In comparison with that of aculeatus and pristipeltis 

 the body is higher and broader, and the tail is longer. There 

 are 25 caudal rings. 



Rad.— P. 18 ; D. 33 ; A. 3 ; C. 10. 



The colour is brown, with black specks on the upper border of 

 the dorsal fin. Caudal fin black. 



The Vienna Museum possesses a female specimen. 



