DISCUSSION OF SPECIES AND THEIU itlSTKIbUTION. 483 



Order HEMIBRANCHII. 



Hemibranchii, Cope, Proc. Ainer. Assoc. Adv. Science., xx, 1872, a:W. — (Jii.r., Arr. Fain. Pish., 872, xxxix; 

 Proc. Acad. Nat. Sci., Pliila., 1884, 1.51. 



Physoclystous, t*^liM)ci^i)liiilou.s fishes, haviug' the pharyiiji'eal hones and hranchial arches 

 in some respects reduced or deficient, and ouly one hone connecting the shoukler girdle 

 with the skull. 



Family MACRORHAMPHOSIDyE. 



I Cenlrischin'i, Rafinksque, Indice d' Ittiologia Siciliaiia, 1810, 33-34. 



Ceittrixcoidci, Bleekeu, Enuni. S|i. Piscinm, Archipel, Iiidico, 18.59, xxiir. 



CcuMsvidw, SwAiN.soN, Nat. Hist. Fisli. i^tc, 1839, ir, 31. — Giixtuek, C;it. Fisli Brit. Mus., iii, 1861, 518. — 



GiLi,, Arr. Pam. Fislus, 1872, 25.— Juuuan and Oilbekt, Bull. XVI, U. S. Nat. Mus., 1882, 387. 

 Miiiioiliiimphosidw, GiLL, Proc. Acad. Nat. Sci., Phila., 1884, 163; Century Dictionary, 3565. 



Heiiubiaiichiates with compressed body, armed with bony plates on belly and anterior 

 parts of body. Snout long, tubiforin. Yentrals abdominal, with one si)ine aud seven 

 rays. Dorsal spinous, distinct, median or post median. The four anterior vertebras much 

 lengthened. The branchihyals and pharyngeals mostly present, the fourth .superior 

 branchihyal and the first and fourth superior pharyngeal wanting. 



MACRORHAMPHOSUS, Lacepede. 



Macrorhampliosiis, hxctvknF., Hist. Nat. Poisa., v, 136. 



f'cB/cisciw, CuviER, Ri»gne Animal, ed. i, 1817, li, 350. — Guntheu, Cat. Pish Brit. Mus., iii, 518. — Jordan 



.and Gilbert, Proc. U. S. Nat. Mus., v, 1883, 575. 

 < Irthk'hihijs, GiLL, Proc. Acad. Nat. Sci.. Phila., 1862, 234. 



Centriscids, having the Ixxly oblong, slowly merging into a caudal peduncle. Back 

 straight; dorsal spines about 7. Three longitudinal rows of plates on tlu; breast. 



MAC:R0RIIAMPH0SUS SCOLOPAX, (Linn.eus). (Figure 396). 



Centrhcus scolopaj-, Linn.eus, Syst. Nat., ed. xil, 1766, i, 415. — GC'NTIier, loc. cit. — Vaillant, Exp. Sci. 

 Travaifleur ct Talisman, 338, pi. xxvn, Fig. 3. 



A MacrorhaiiipliosuK, with very strong second dorsal spine, whicli is .serrated posteriorly, 

 whose length is threehfths to three-eighths of the distance from the opercle to the caudal; 

 the height of its body is four-sevenths to three-fifths of the distance from the operculum to 

 the base of the caudal. Lateral line 57 ; transverse line 37. 



Eadial formula: D. V+IU; A. 20. 



Color, rose or reddish oli\'e on the back, silvery on the sides and on the belly. 



This species is not uimsuid in the Mediterranean, lias been found on the .south coast of 

 England, and in Jlassachusetts Bay. As many as 10 individuals were caught by the 

 French exploring Vessels at considerable depths: — off the coast of Morocco, station xxiii, 

 at 120 meters; off that of Souda-n, station Lxvii, at 130 meters; and on the Banc d'Arguin, 

 stations xc, xci, and xcii, at 110 to 235 meters. 



Family AULOSTOMID^^. 



Lea Jiilosfomides (part) Latreti.i.e, Fain. Nat. Rcgne Animal, 1825, 19. 



AiiltMloiiKdidd- (jiart) Cantok, Cat. Malayan Fishes, 18.50, 211. 



AiilustuiiKiloidci, Bleeker, Enuiii. Sji. I'isc. Arch, lud., 18.59, xxiii. 



Aulviilomidir, (JiLL, Arr. Fam. Fisli., 1872, 14; Proc. Acad. Nat. Sci.. Phila., 1884, 160. 



Hemibranchiate fishes, with compressed, elongate body, small ctenoid scales, and 



continuous lateral line. Head long; mouth .small; with snout elongate, comjiressed, tubi- 

 forin; lower jaw prominent, with barbel at symphysis. I'remaxillary notiirotractile; max- 

 illary broad, triangular, with a supplemental bone. Teeth minute, in bands on lower jaw 

 and vomer. Spinous dorsal present, of .S to 12 feeble, isolated spines. Soft dorsal and 



