PLEURONECTIN^ 



355 



teeth between these rows ; teeth along the posterior edge more or less compressed 

 and incisor-like. Scales mostly embedded, not imbricated, except on hinder part of 

 body, some of those at bases of dorsal and anal fins, along the region of the lateral 

 line, on the postocular part of the head, and on the abdominal region ctenoid. Dorsal 

 (62) 67-74. Anal 46-54. Pectoral of ocular side with 11 or 12 rays (7 or 8 branched), 

 length about twice in that of head. Caudal with 18 to 20 rays (12 to 14 branched) ; 

 caudal peduncle about as long as deep. Intestine similar to that of Platichthys flesus. 

 Brownish or olivaceous, with or without orange spots on body and fins. 



-Hybrid Pleuroncctes platessa X Platichthys flesu 

 X J. 



Distribution. — Baltic ; 

 Specimens Examined : 

 I (305 mm.). 



I (390 ,, ). 



south-western Cattegat ; Folkestone. 



aff Skovshoved. 



Johansen. 

 Haynes. 



In most respects these specimens seem to be roughly intermediate betiveen the 

 two parent species, but in the size of the mouth, form of the interorbital ridge, and 

 in the form of the intestine, they approach Platichthys flesus. 



Genus 21. MICROSTOMUS. 



Microstomus,^ Gottsche, 1835, Arch. Naturgesch., i (2), p. 136 [Microstomus latidens, Gottsche] ; 

 Jordan and Evermann, 1898, Bull. U.S. Nat. Mus., xlvii (3), p. 2653. 



Cynicoglossus, Bonaparte, 1837, Icon. Faun. Ital.,iii, Pesci, (19), sign. 97 .3,descr. of Platessa passer 

 [Pleuronectes cynoglossus, Nilsson]. 



Cynoglossa, Bonaparte. 1S46, Cat. metod. Pesci Europ., p. 48 [Pleuronectes microcephalus , Donovan]. 



Brachyprosopon, Bleeker, 1862, Versl. Akad. Wet. Amsterdam, xiii, p. 428 [Pleuronectes micro- 

 cephalus, Donovan]. 



Verccqua, Jordan and Starks, 1904, Bull. U.S. Com. Fish., xxii, (1902}, p. 625 ; Jordan and Starks, 

 1906, Proc. U.S. Nat. Mus., xxxi, p. 210 [Verceqtta achne, Jordan and Starks]. 



Not to be confused with Microstoma, Cuvier (1817), a genus of Salmonoid fishes. 



