PLEURONECTIN.E 



365 



Eggs, Larv.€ and Young. 

 mingham, 1887, Trans. Roy. Soc. Edinb., xxxiii (i), p. loi, pi. iii, figs. 7-9, pis. iv, v ; Mcintosh 

 and Prince, 1890, Trans. R. Soc. Edinb., xxxv (3), p. 839, pi. xviii, figs. 7-9 ; Holt, 1891, Sci. 

 Trans. R. Dublin Soc, (2) iv, p. 455 ; Holt, 1893, Sci. Trans. R. Dublin Soc, (2) v, p. 84, pi. ix, 

 figs. 71-75, pi. XV, figs. 123-4 ; Petersen, 1894, Rep. Danish Biol. Stat., iv, (1893), p. 130, 

 pi. ii, figs. 14, 20 ; Cunningham, 1896, N. H. Market. Mar. Fish., p. 233, figs. 108, 109 ; 

 Mcintosh and Masterman, 1897, Brit. Mar. Food-fish., p. 372, figs. ; Heincke and Ehrenbaum, 

 1900, Wiss. Meeresuntersuch., Abt. Helgoland, n.f., iii, p. 229 ; Holt and Byrne, 1903, Rep. 

 Fish. Ireland, (1901), II. Sci. Invest., iv, p. 67, pi. iii ; Kyle, 1903, J. Mar. Biol. .\ss., n.s., vi, 

 p. 618, pi. iii, fig. 2; Williamson, 1904, Rep. Fish. Board Scotland, xxii (iii). (1903), p. 270, 

 pi. xvi ; Petersen, 1904, Medd. Komm. Havundersog. Kjob., Ser. Fisk., i (l), p. 9, pi. ii, 

 figs. 22-28; Ehrenbaum, 1905, in Brandt and Apstein, Nordisches Plankton, I. Eier Larv. 

 Fisch. (i), p. 171, fig. 71 ; Schnakenbeck, 1928, Ber. d. wiss. Komm. Meeresf., n.f., iv (4), p. 211, 

 pi. v ; Schnakenbeck, 1929, in Joubin, Faun. Ichth. Atlant. Nord, iii, figs. 



Fig. 264. — Glypiocephalus 



MISSUS. B..M. (N.H.) 88.3.16.2. 



Gill-rakers short, rather stout ; 6 to 9 



Depth of body 2| to 3^ in the length, length of head 4 J to 5 J. Upper profile of 

 head more or less evenly conve.x. Snout not scaled, shorter than eye, diameter of 

 which is 3 J to 4^ in length of head ; lower eye a little in advance of upper ; interorbital 

 ridge rather low, narrow, scaled ; postocular ridge scarcely apparent ; eye-balls 

 not scaled. Maxillary extending to below anterior edge or anterior part of eye, 

 length on ocular side 4^ to 5, on blind side 3I to 4^ in that of head ; lower jaw a little 

 projecting, about 3 in head. Teeth somewhat compressed, with incisor-like edges, 

 forming a subcontinuous cutting edge ; bluntly conical and separated on ocular side 



in voung ; dental formula ~ ' ' — ^ — . 

 9-16 -\- 20-26 



on lower part of anterior arch ; width of lower pharyngeals more than 5 times in 

 length ; teeth of inner row distinctly larger than those of outer. Scales varying 

 in size, somewhat irregularly arranged, mostly cycloid, but sometimes a few feebly 

 ctenoid on ocular side; no to 140 in a longitudinal series just above lateral line. 

 Lateral line nearly straight or with a very low curve above pectoral fin ; a short 

 supratemporal branch. Dorsal (95) 97-115 (120) ; origin on median line, well behind 

 posterior nostril of blind side and above anterior part of eye ; highest rays about 

 i length of head. .\nal 85-99 (102) ; interhaemal spine rather small. Pectoral of 

 ocular side with 9 to 13 rays (6 to 10 branched), length li to 2 J in that of head. Pelvics 

 with 6 rays. Caudal with 20 to 24 rays (12 to 16 branched), rounded ; caudal peduncle 

 li times to twice as deep as long. 2 -j- 4 or 5 rather long pyloric appendages. Vertebras 

 58 to 60 (12-14 -|- 45~4*^)- Brownish or greyish brown ; body and fins thickly speckled 

 with minute black dots, which are generally fewer, larger and more scattered on blind 

 side ; median fins more or less dusky towards their margins on both sides ; anterior 

 rays of dorsal and anal sometimes tipped with paler ; distal part of pectoral blackish. 



