30 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 9 



Ephippidae Spadefish 



Parapsettus panamensis Steindachner 



One from Sihuatanejo, Mexico, December 11, 1931. Length 159 mm. 

 Dorsal IX, 28 ; anal III, 24. Snout somewhat overhanging the lower jaw. 

 Lateral line curved. 



Ghaetodontidae Butterflyfishes 



Chaetodon humeralis Giinther 



One from Tagus Cove, Albemarle Island, Galapagos, January 12, 

 1934. Length 30 mm. Two from Black Beach Anchorage, Charles Island, 

 Galapagos, Januaiy 14, 1934. Length 14-15 mm. One from South Sey- 

 mour Island, Galapagos, January 22, 1934. Length 35 mm. Color in 

 alcohol dull brownish yellow. A distinct ocular band almost equal to eye 

 extends from origin of dorsal and unites with its fellow below. A second 

 dark band, slightly greater in width, extends from the anterior portion of 

 the spinous dorsal down the opercles, covering the base of the pectorals, 

 and to the axil of the ventrals. A third wide dark band from posterior of 

 spinous dorsal along base of soft dorsal and anal. Caudal peduncle black. 

 Ventrals black. Soft dorsal, caudal, and anal uniform yellowish. 



Centropyge passer (Valenciennes) 



One from Panama Market, December 24, 1931. Length 209 mm. 

 Blue black with a distinct white stripe extending down to the middle of 

 side. Caudal, pectoral, and ventral yellow. 



Acanthuridae Tangs 



Acanthurus crestonis (Jordan and Starks) 



One from Panama Market, December 24, 1931. Length 209 mm. 

 Color uniform bister brown, with a slightly darker area encircling the 

 base of caudal. Teeth lobate. (Very near if not identical with A. matoides 

 Cuvier and Valenciennes.) 



Scorpaenidae Scorpionfishes 



Sebastopsis kelloggi Jenkins 



One from Port Culebra, Costa Rica, February 25, 1934. Length 60 

 mm. Dorsal XII, 10; anal III, 5. No teeth on the palatine. Four spines 



