90 TRIGLID^. 



A dorsal series of bony plates ; oblique and separate 

 series of small ciliated scales beneath the lateral 

 line ; no palatine teeth ^ 35. Triolops. 



Body with isolated bands of scales; dorsal fins con- 

 tinuous, separated by a notch 30. Hemilepidotus. 



Body with isolated bands of scales ; two separate dorsals. 37. Artedius. 



The second dorsal very elevated 38. Ptyonotus. 



One dorsal with flexible spines and rays 39. Polycaulus. 



Ventrals thoracic, but situated behind the root of the 

 pectorals ; the first dorsal spine short, and isolated 

 from the others 40. Platycepiialus. 



Ventrals thoracic, but situated a little before the pec- 

 torals ; body incompletely covered with series of 

 bony plate-like scales 41. Hoplichtiiys. 



Ventrals thoracic, but situated a little before the pec- 

 torals, with five soft rays ; body scaly 42. Bem bras. 



Three pectoral appendages ; palatine teeth 43. Prionotus. 



Three pectoral appendages ; palatine teeth none ; scales 



of moderate size 44. Lepidotricla. 



Three pectoral appendages ; palatine teeth none ; scales 



very small 45. Trigla. 



Fourth group : Cataphracti. Triglidce with the body completely 

 cuirassed by bony, keeled plates or scales. Pyloric appendages in 

 small or moderate number. 



Two dorsals ; no pectoral appendages ; pectoral simple. 46. Agonus. 



One dorsal 47. Aspidophoroides. 



Two pectoral appendages 48. Peristbthus. 



Pectoral very long (organ for flying), with the lower 



portion detiiched and shorter 49. Dactylopterus. 



Pectoral not elongate, divided into two portions by a 



deep notch 50. Cephalacanthus. 



First Group. HETEROLEPIDINA. 



Heterolepidae, Girard in U. S. Pacif. 11. It. Exped. Fishes, p. 41. 



TrigUdce with the body covered with ordinary scales, and with 

 many pyloric appendages. The two portions of the dorsal fin and 

 the anal elongate and equally developed. 



All these fishes, from the northern parts of the Pacific, have a 

 common, and such a peculiar feature in their habit, that they should 

 be comprised in one group, although it is impossible, from our 

 scanty knowledge of their anatomy, to circumscribe it with proper 

 characters. The increased number of the pyloric appendages, found 

 in the species hitherto examined, and the elongate anal fin appear to 



