. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. 42 BULLETIN OF THE BUREAU OF FISHERIES. the third and fourth shorter and more robust, directed downward and forward; the upper two preo- percular spines reaching to or almost to edge of opercle; numerous small pores scattered on top and sides of head; pair of symphyseal pores directed mesad,opening separately into a common pit or depression which lies between them; gill membranes wholly free from isthmus; no pore behind last gill arch; mandible well included; broad bands of minute villif
. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. 42 BULLETIN OF THE BUREAU OF FISHERIES. the third and fourth shorter and more robust, directed downward and forward; the upper two preo- percular spines reaching to or almost to edge of opercle; numerous small pores scattered on top and sides of head; pair of symphyseal pores directed mesad,opening separately into a common pit or depression which lies between them; gill membranes wholly free from isthmus; no pore behind last gill arch; mandible well included; broad bands of minute villiform teeth in both jaws, very narrow bands on vomer and palatines; maxillary reaching vertical from middle of eye. Preorbital narrowed posteriorly through the upcurving of the lower margin, narrower than in Icelus Fig. 3.—helus spatula, new species. Type. Dorsal series of plates usually incomplete anteriorly, greatly diminished in size or disappear- ing under the anterior half of spinous dorsal; it is variable in extent posteriorly, but typically reaches middle of caudal peduncle; a well-defined band of prickles accompanies the dorsal series of plates, leaving a naked strip along base of the dorsal fins; lateral line always complete, the area between it and the dorsal series of plates naked, without prickles or scattered plates; afew large spinous plates behind the pectoral fin; top and sides of head, as far down as preorbital and suborbital stay, covered with minute prickles, which are a trifle coarser and less numerous than in Icelus uncinalis. Dorsal fins separated; spinous dorsal low, not elevated in males, much lower than second dorsal; caudal emarginate when folded, truncate or gently rounded when spread; pectoral reaching base of fourth anal ray; ventrals reaching vent. The dorsal spines and a few of the anterior dorsal rays are accompanied by series of small prickles. Color in spirits: Less definitely marked than Icelus uncinalis, the dorsal bands usually l
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1910, bookyear1910
