168 TELEOSTEI: PLECTOGNATHI. XXII. 



in 5 mostly cycloid. Dark gray, mottled with darker ; fins 

 spotted. Head 3J ; depth 2. D. 55. A. 40. Lat. 1. 70. L. 12. 

 Arctic regions, S. to Cape Cod, our form or variety (L, putnami 

 Gill) common from Cape Ann to Nova Scotia; the original glacialis 

 in Alaska. (Pleuronectes glaher Storer.) 



237. GLYPTOCEPHALtTS Gottsche. (yXvirroj, sculptured; 

 Ke(j)a\ri, head.) 



475. Gr. cynoglossus (L.). Craig-fltjke. P. short, not half 

 head ; eyes large, 3 in head. Grayish brown, fins spotted. Head 

 5; depth 2f. D. 101 to 112. A. 87 to 99. Lat. 1. 125. L. 12. 

 N. Atl., S. to Cape Cod. (£«.) (An old name, from Kvav, dog; 

 yXdacra, tongue.) 



238. ACHIRUS Lacepfede. i&xeip, without hands.) 

 a. Pectorals wanting. {Acldrus.) 



476. A. fasciatus Lacepede. Sole. Hog-chokek. Eyed side 

 without black hair-like cilia. Olive-brown, mottled and with about 

 8 dark vertical streaks; vertical fins with dark spots and clouds; 

 blind side usually with round dark spots. Head 4 ; depth 1^. 

 D. 50 to 55. A. 37 to 46. Lat. 1. 66 to 75. L. 8. Cape Cod to 

 Texas, abundant, ascending rivers. (Lat., banded.) 



239. SYMPHTJRUS Kafinesque. (Plagusia Cuvier ; Aphoristia 

 Kaup.) (^(rvfj-tpvai, to grow together ; oipa, tail.) 



477. S. plagiusa (L.). Tongue-fish. Body broadly lanceo- 

 late. Brown, with faint darker longitudinal streaks and with black 

 cross-bars; C. similarly colored, never Mack. Head 5; depth 3 to 

 3^. D. 86 to 95. A. 75 to 80. Lat. 1. 85 to 93. L. 5. Va. to 

 Texas, common S. (irXdytor, oblique.) 



Order XXII. PIiECTOG]S"ATHI. (The Plectogxaths.) 



Premaxillaries co-ossified with the maxLUaries, and dentary with 

 the articular; post-temporal undivided, grown fast to the skuU; 

 interopercle rod-like ; upper pharyngeals forming vertical trans- 

 verse laminte; skin naked or variously covered with rough scales, 

 shields or spines. Vertebrae usually in less than normal number, 

 15 to 30. Ventral fins reduced or wanting. 



This group is a modified offshoot of the suborder Epelasmia of 

 Acanthopteri. The relations of the Balistidus with the Acanthuridw 

 of the latter group are very close. (ttXiktos, joined ; yvados, jaw.) 



Family XC. BALISTIDuS]. (The Trigger-fishes.) 

 Body ovate, compressed, covered with scales of varying struc- 

 ture. Mouth small, terminal, low ; jaws short, each with one or 

 more series of separate incisor-like teeth ; eye very high. Gill 



