PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 157 



This white-fish is also represented in the National Museum by two 

 well-preserved specimens (Nos. 24023 and 24024) collected by William 

 H. Dall, March 12 and March 19, 1867 (collector's numbers 666 and 672), 

 at Nulato on the Yukon Eiver. 



I dedicate the species to my wife, Lauretta H. Bean. 



Ptilichthys, n. g. (Mastaeemhelidce ?) 



Body elongate, serpen tiform, apparently covered with very thin scat- 

 tered scales. Mandible little movable, projecting, with a skinny ap- 

 pendage at tip. Cleft of the mouth narrow. Minute teeth in a single 

 series in the jaws, becoming larger and slightly curved posteriorly. 

 Margin of upper jaw formed entirely by the iutermaxillaries. Maxilla 

 curved forward below. The gill-opening extends up to the middle of 

 the base of the pectoral ; the membrane is slightly emarginate behind 

 and is free from the isthmus; 4 gills, a slit behind the fourth. Gill- 

 rakers stout and short, moderate in number. Spinous portion of the 

 dorsal consisting of many isolated spines, a narrow membrane behind 

 each. Soft dorsal and anal with many rays. End of the tail free. Ven- 

 trals none. 



Ptilichthys Goodei, n. s. 



Museum number 26619, collector's number (1590) — Dall and Bean. 



Dredged in 10 fathoms at the entrance to Port Levasheff, Unalashka, 

 on the ridge, hard bottom, by Sylvanus Bailey, July 28, 1880. 



I am indebted to the Alaska Commercial Company of San Francisco 

 for the loan of the only other known specimen, an example 302 milli- 

 meters long taken at Unalashka. Length of type 160 millimeters. The 

 species is dedicated to my colleague, Mr. G. Brown Goode. 



Br. V ; D. XC, 145 ; A. ca. 185 ; P. ca. 12. 



Greatest height of body equals the post-ocular part of the head. Eye, 

 equal to snout, 5 in head. Head 15J times in total length. Maxilla 

 extends to a little beyond the front margin of the orbit ; mandible to 

 middle of the eye. The mandibulary appendage is one-half as long as 

 the eye. The dorsal begins slightly in advance of the pectoral; the 

 spinous portion equals 6^ times the length of the head. The distance 

 from the tip of the lower jaw to the anus equals 4§ times the length of 

 the head. The anal begins under the fifty-third sphie of the dorsal. 

 The pectoral is half as long as the head. None of the dorsal spines 

 are quite equal to half the length of the eye. The soft dorsal and the 

 anal are highest near the middle of their length ; the height of each 

 equals about f of the body height at the same point. The free caudal 

 tip is about f as long as the eye. 



Raia parmifera, n. s. 



Collector's number (1753); Museum number 27051. 



Taken at Iliuliuk, Unalashka, October 12, 1880, and preserved almost 

 entire after measurements and color notes were made. 



