168 TELEOSTEI : PLECTOGNATHI. — XXII. 
in @ mostly cycloid. Dark gray, mottled with darker ; fins 
spotted. Head 34; 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 glaber Storer.) 
237. GLYPTOCEPHALUS Gottsche. (yAvmrés, sculptured ; 
kepaadn, head.) 
475. G. cynoglossus (L.). CRAIG-FLUKE. P. short, not half 
head; eyes large, 3 in head. Grayish brown, fins spotted. Head 
5; depth 28. D.101t0112. A. 87 to 99. Lat.1.125. L. 12. 
N. Atl., S. to Cape Cod. (£u.) (An old name, from xiv, dog; 
yAeooa, tongue.) 
238. ACHIRUS Lacépede. (dyeup, without hands.) 
a. Pectorals wanting. (Achirus.) 
476. A. fasciatus Lacépede. SoLtE. Hoc-cnoxer. 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 14. 
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. SYMPHURUS Rafinesque. (Plagusia Cuvier; Aphoristia 
Kaup.) (cvpdve, to grow together; ovpa, tail.) 
477. S. plagiusa (L.). TonGur-risu. Body broadly lanceo- 
late. Brown, with faint darker longitudinal streaks and with black 
cross-bars; C. similarly colored, never black. Head 5; depth 3 to 
31. D. 86 t095. A. 75 to 80. Lat. 1.85 to 93. L. 5. Va. to 
Texas, common 8. (aAdyios, oblique.) 
OrvER XXII. PLECTOGNATHI. (THE PLECTOGNATHS.) 
Premaxillaries co-ossified with the maxillaries, and dentary with 
the articular; post-temporal undivided, grown fast to the skull; 
interopercle rod-like; upper pharyngeals forming vertical trans- 
verse lamine; skin naked or variously covered with rough scales, 
shields or spines. Vertebre 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 Balistide with the Acanthuride 
of the latter group are very close. (mAexros, joined; yvd6os, jaw.) 
Famity XC. BALISTIDA. (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 
