21. VULSTTS. 151 



with six or seven dark-brown longitudinal lines, and with vcrmicu- 

 Jated white lines. A large semicircular brown spot on the base of 

 the pectoral fin ; anal white, with large bro'WTi spots ; caudal with 

 four or five cross-series of brown dots. 

 Mozambique. 



a. Female. Mozambique. From Prof. Peters's Collection. 



21. Callionymus opercularis. 



Chv. 4- Val xii. p. 305. 



B. 5. D. 4 I 9. A. 9. C. 11. 



Foramen hranchiale on the side of the neck, covered by the ex- 

 tremity of the operculum, which is produced backwards. Pracoper- 

 cular spine straight, with about six tooth-like processes superiorly ; 

 none at the base. 'ITie diameter of the eye is two-thirds of the width 

 of the interorbital space. {Val.) 



Mouth of the river Arian-Coupan. 



a-c. Old Collection. 



22. Callionymus opercularioides. 

 Bleek. Natuurk. Tydschr. NederL Ind. i. 1850, p. 32. 

 B. 6. D. 4 1 9. A. 9. 



Foramen hranchiale on the side of the neck, covered by the ex- 

 tremity of the operculum, which is produced backwards. Praeoper- 

 cular spine straight, with four or five tooth -like processes superiorly ; 

 none at the base. The width of the interorbital space is one-half 

 the diameter of the eye. Blackish, with numerous black points ; the 

 anterior dorsal and ventral fins black ; the rays of the other fins 

 black-dotted. {Bl.) 



Seas of Padang (West Sumatra) and of Batjan, 



21. VULSUS. 



Callionymus, sp., Cuv. ^ Val. 



Dactylopus *, CHll in Proc. Acad. Nat. Sc. Philad. 1859, p. 130. 



Head and anterior part of the body not much depressed ; the rest 

 subcylindrical, naked. Cleft of the mouth narrow, horizontal, with 

 the iipper jaw protractile. Eyes of moderate size. Teeth very small, 

 palate smooth. A strong spine at the angle of the praeoperculum. 

 Two dorsal fins, the anterior with four flexible spines ; ventrals five- 

 rayed, widely apart from each other. The outer ventral ray is de- 

 tached from the fin. Gill-opening reduced to a small slit behind the 

 operculum ; four gills ; pseudobranchise ; six branchiostegaLs ; air- 

 bladder none. 



Sea of Amboyna. 



* Preoccupied. 



