PLEURONECTIN^ 



Eggs, Lar 



ND Young. 



Schiodte, 1868, Naturhist. Tidskrift, (3) v, p. 269, pi. xi, figs. 2-4 ; Cunningham, 1888, Trans. Roy. 

 Soc. Edinb., xxiii (i), p. 99, pi. ii, figs. 1-3 ; Mcintosh and Prince, 1890, Trans. Roy. Soc, 

 Edinb., xxxv (3), p. 840, pi. i, fig. 20, pi. v, fig. 6, pi. vi, fig. 7, pi. xii, fig. 7, pi. xiv, fig. 5, pi. xvi, 

 fig. 5 ; FuUarton, i8gi. Rep. Fish. Board Scotland, ix (iii), (i8go), p. 311, pis. vii-ix ; Fullarton, 

 1893, Rep. Fish. Board Scotland, xi (iii), (1892), p. 274, pis. xiii-xvi ; Holt, 1893, Sci. Trans, 

 R. Dublin Soc, (2) V, p. 76, pi. xiv, figs. 107-111 ; Canu, 1893, Ann. Stat, aquic. Boulogne, i, 

 p. 130, pi. ix, fig. 2 ; Petersen, 1894, Rep. Danish Biol. Stat., iv, {1893), pp. 2, 125, pi. ii, fig 

 10; Cunningham, 1896, N.H. Market. Mar. Fish., p. 213, figs. 106-7; Ehrenbaum, 1897 

 Wiss. Meeresuntersuch., Abt. Helgoland, n.f., ii (i), p. 260, pi. iv, figs. 12-15 ; Mcintosh and 

 Masterman, 1897, Brit. Mar. Food-fish., p. 356, figs.; Hensen and Apstein, 1897, Wiss 

 Meeresuntersuch., Abt. Kiel, n.f., ii (2), pp. 34, 43, 69, pi. ii, figs. 7-10 ; Dannevig, 1897, Rep, 

 Fish. Board Scotland, xv (iii), (1896), p. 175, pi. iv ; Kyle, 1898, Rep. Fish. Board Scotland 

 xvi (iii), (1897), p. 225. pi- X ; Heincke and Ehrenbaum, 1900, Wiss. Meeresuntersuch., Abt 

 Helgoland, n.f., iii, p. 223, pi. ix, figs. 5, 6^ ; Hock, 1903, Pub. Circ. Cons. Explor. Mer., iii 

 p. 57, pi. vi ; Ehrenbaum and Strodtmann, 1904, Wiss. Meeresuntersuch., Abt. Helgoland, n.f. 

 vi, p. 84 ; Ehrenbaum, 1905, in Brandt and Apstein, Nordisches Plankton, I. Eier Larv. Fisch, 

 (i). P- 156. fig- 68^ ; Petersen, 1906, Medd. Komm. Havundersog. Kjob., Ser. Fisk., ii (i), p. 4 

 pi. i, figs. 1-6; Schnakenbeck, 1929, in Joubin, Faun. Ichth., Atlant. Nord, iii, figs. 



Fic. 257. — Pleuronectes platessa. B.M. (N.H.) 1923. i 



p., lower pharyngeals. 



Depth of body i^ to 2^ in the length, length of head 3 to 3-^. Upper profile of 

 head distinctly concave. Snout (in adults) longer than eye, diameter of which is 

 4 (young) to 8 in length of head ; lower eye a little in advance of upper ; interorbital 

 ridge low, narrow, naked or with a few embedded scales ; a bony prominence in front 

 of lower eye and often a trace of another before upper eye ; a row of 4 to 7 irregular 

 bony prominences extending from behind the eyes to commencement of lateral line, 

 their bases sometimes connected by a low keel. Maxillary extending to below anterior 

 part of eye. length on ocular side 4^ to 4! , on blind side 35 to 4 in that of head ; lower 



jaw a little projecting. 2J to 2| in head. Dental formula ?r.^-i^ J^—^- . 6 to 9 eill- 



2-7 -j- 18-35 

 rakers on lower part of anterior arch ; lower pharyngeals broader, width 2| to 3^ in 

 length, massive, approximated for more than half their length, their inner edges angular ; 



^ Consult for full list of references. 



