Jordan and Evermann. Fishes of North America. 367 



e. One row of pores along lateral line; tail truncate, (doubtless mutilated); 

 color black. LABICHTHYS, 170. 



ee. Three rows of pores along lateral line; color dusky silvery, darker 

 below ; tail always ending in a long filament. NKMICHTHTS, 171. 



167. SERRIVOMER, Gill & Ryder. 



Serrivomer, GILL & RYDER, Proc. U. S. Nat. Mus., 1883, 260, (beanii). 



Nemichthyids with the head behind eyes of an elongated parallelo- 

 graniic form, with moderately attenuated jaws ; branchiostegal membrane 

 confluent at posterior margin, but with the branchial aperture limited 

 by an isthmus except at the margin, and with lancet-shaped vomerine 

 teeth in a crowded (sometimes doubled) row. (semi, saw : vomer, 

 vomer.) 



600. SERRIYOMER BEANII, Gill & Ryder. 



Stoutest of the family, with much shorter jaws than any other, and 

 with a very formidable vomerine armature ; depth of head at vertical 

 from mandibular articulation contained 37 times in the total length; 

 greatest height 29f in total length. (Gill <fc Ryder.) Gulf Stream. (Lat. 

 41 40' 30", long. 65 28' 30", at 855 fathoms.) Also taken by Dr. Gilbert 

 in the Gulf of California. (Named for Tarleton Hoffman Bean.) 



Serrivomer beanii, GILL & RYDER, Proc. U. S. Nat. Mus., 1883, 261, Gulf Stream; JORDAN & 

 DAVIS, I. c., 653. (Type, No. 33383. Coll. Albatross.) 



168. SPINIVOMER, Gill & Ryder. 



Spinivomer, GILL & RYDER, Proc. U. S. Nat. Mus., 1883, 261, (goodei). 



jVemichthyids with a rectilinear occipitorostral outline, with very atten- 

 uated jaws, high mandibular rami, the branchial aperture nearly conflu- 

 ent ; enlarged acute conic teeth in a median row on the vomer, and with 

 a silvery epidermis and filiform tail, (spina, spine ; rower, vomer.) 



601. SPINIVOMER GOODEI, Gill & Ryder. 



Silvery; recognizable also from its smaller eye and deeper mandibles; 

 greatest height of body at the branchial regions contained 52 times in 

 total length; rays ensheathed in a tough membrane. (Gill & Ryder.) 

 Gulf Stream. (Lat. 38 19' 26", long. 68 20' 20", at 2,361 fathoms.) 

 (Named for George Brown Good.) 



Spinivomer goodei, GILL & RYDER, Proc. U. S. Nat. Mus., 1883, 261, Gulf Stream; JORDAN <k 

 DAVIS, 1. c., 654. (Type, No. 33293. Coll. Albatross.) 



169. AVOCETTINA, Jordan & Davis. 



Avocettina, JORDAN & DAVIS, Apodal Fishes, 655, 1892, (infans). 



This genus is closely allied to Nemichthys, but differs notably in the 

 position of the vent. Lateral line with one series of pores. (Avocetta, 

 the avocet, Recurvirostra, from the form of the bill.) 



602. ATOCETTINA INFANS (GUnther). 



Eye rather large, contained 2 to 3 times in the distance between eye 

 and pectoral ; jaws long and filamentous, upper jaw 4 times the length 

 of postorbital part of head ; both jaws covered with very fine recurved 



