158 TELEOSTEI: ACANTHOPTERI. — XX. 



e. Canine teeth none Isesthes, 207. 



ee. Canine teeth in one or both jaws behind the other teeth. 



Hypleurochilus, 208. 

 aa. Teeth conic (not like comb-teeth); D. (in our genera) of spines only; 

 vertebra? very numerous; lateral line not bent; body scaly; species 

 chiefly Arctic. 

 f. Gill openings not continued forward below, the membranes broadly 

 united. V. minute or wanting. (Xiphidiince.) 

 g. Lateral line none; V. rudimentary; gill membrane free from isth- 

 mus; A. with 2 small spines; no pyloric caeca. Mur.t.noides, 209. 

 ff. Gill openings prolonged forward below, separated by a narrow 

 isthmus; P. long; V. well developed; oviparous; herbivorous. 

 (SHcJueiruB.) 

 b. Lateral line present. 



i. Lateral line forked or duplicated. . Eumesogrammus, 210. 



ii. Lateral line simple Stich^us, 211. 



hh. Lateral line wanting; teeth on jaws only. Leptoblennius, 212. 



206. CHASMODES Cuv. & Val. (yaoTKB&ns, yawning.) 



437. C. bosquianus (Lacepede). Orbital tentacle minute or 

 wanting ; maxillary reaching beyond eve : £ olive green with 9 blue 

 lines; head and 1st D. with orange; 9 dark green, reticulated and 

 barred. Head 3£ ; depth 3£. D. XI, 19. A. 20. L. 3. N. Y. 

 to La. (To M. Bosc, a zealous collector of the fishes of S. C.) 



207. ISESTHES Jordan & Gilbert, (uroy, equal ; iadia, to eat.) 



438. I. hentz (Le Sueur). Orbital cirrus bifid at tip, as long as 

 D. spines. D. high, the spines stiff. Olive, with vague bars ; head 

 with distinct black spots. Head 3$ ; depth 3£. D. XII, 15. A. 19. 

 L. 1\. Md. to La. (Bl. punctatus Wood; name preoccupied.) (To 

 Mr. Hentz, an early entomologist.) 



208. HYPLEUROCHIIiUS Gill, (£, upsilon ; nXevpov, side ; 



X*IXos, lip.) 



439. H. geminatus (Wood). Orbital cirrus branched, very high 

 in £ ; D. spines slender. Olive brown, back and fins with black 

 spots in $. Head 3 J ; depth 4. D. XI, 15. A. 18. L. 2J. Va. 

 to Texas, with the two preceding and others, among oyster shells 

 and clusters of tunicates; also about ballast piles. (Bl. multifilis 

 Girard, £ .) (Lat., twin.) 



209. MTJR.3EJNOIDES Lacepede. (pvpaiva, moray; eiSoy, form.) 

 o. Ventral* present, I, 1. 



440. M. gunnellus (L.). Butter-fish. Head naked. Brown 

 with darker bars ; black ocelli along base of D. Head 8 ; depth 9. 

 D. LXXVTII. A. II, 38. Yert. 85. L. 12. Labrador to Ya., 

 common in sea weed, N. (Eu.) (From " gunnel," gunwale, wrongly 

 supposed to be its English name.) 



