[67] CATALOGUE OF THE FISHES OF NOKTU AMERICA. 

 188.— SPINIVOMER ' Gill & Kyder. 



646. Spinivomer goodei Gill & Kyder. B. 



189.— SERRIVOMER^ Gill & Ryder. 



647. Serrivomer beani Gill iV: Ryder. B. 



Order T— LYOMERI.^ 



Family LXIY.— SACCOPHAKYNGID^. (55) 

 190.— SACCOPHARYNX Mitcbill. (177) 



648. Saccopharynx ampullaceus ^ Harwood. B. (501) 



Family LXV.— EURYPHAEYNGID^.s 



1 Spixivomeu Gill & Ryder. 



(Gill & Ryder, Proc. U. S. Nat. Mus., 1883, 261; type, Spinivomer goodei G. & R.) 



" Nemichihjiids with a rectilinear occipitorostral outliue, with very attenuated jaws, 



high mandibular rami, the branchial aperture nearly conduent, enlarged acute conic 



teeth in a median row on the vomer, and with a silvery epidermis and filiform tail." 



(Latin, spina, s^iiue ; vomer, vomer.) 



Spinivomer goodei Gill & Ryder, 1. c, 261. Gulf Stream, latitude 38°, at 2,361 

 fathoms. - 



^Serrivomeu Gill & Ryder. 



(Gill & Ryder, Proc. U. S. Nat. Mns., 1883, 260; type, Serrivomer beani G. &. R.) 



" Xemichthyids with the head behind eyes of an elongated parallelogramic form, 

 with moderately attenuated jaws, brauchiostegal 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." 



(Latin, serra, saw; vomer, vomer.) 



Serrivomer beani Gill & Ryder, 1. c, 261. Gulf Stream, latitude 41°, at 855 fathoms. 



3 Order T.— LYOMERI. 



"Fishes with five branchial arches (none modified as branchiostegal or pharyngeal) 

 far behind the skull, an imperfectly ossified cranium articulating with the first ver- 

 tebra by a basioccipital condyle alone, only two cephalic arches, both freely movable, 

 (1) an anterior dentigerous one, the palatine, and (2) the suspensorial, consisting of 

 the hyomandibular and quadrate bones, without maxillary bones or distinct bony 

 elements to the mandible, with an imperfect scapular arch remote from the skull, and 

 -with separately ossified but imperfect vertebrae." (Gill & Ryder.) 



Two families are recognized {Saccopharyngidm and Eurypliaryngidai), deep-sea fishes 

 of remarkable appearance, allied to the eels. The sjjecies are little known, and are 

 possibly all forms of a single one. {Avoi, loose ; /.lepoi, part or segment.) {Lyomeri 

 Gill & Ryder, Proc. U. S. Nat. Mus., 1883, 263.) 



■»The name Saccopharynx flagellum was not given by Mitchill, but by Cuvier (Regne 

 Animal, Ed. II) in 1829. The name ampallaceus of HarwOod has therefore priority, it 

 really referring to the same species. For an exhaustive discussion of our knowledge 

 of Saccopharynx and its relationships see Gill, Proc. U. S. Nat. Mus. , 1884, 48. 



5 The family Eurypharyngidw is thus defined by Gill & Ryder: 



^^ Lyomeri with the head flat above and with a transverse rostral margin, at the 

 outer angles of which the eyes are exposed, with the eyes excessively elongated back- 

 wards and the upper parallel and closing against each other as far as the articulatior 



