3. coTYLis. 497 



The vertebral column is composed of fourteen abdominal and 

 twenty-two candal vertobrse, the abdominal portion being somewhat 

 the shorter. The neural spines of the abdominal vertebrae are 

 somewhat stronger and shorter than in ChorisocMsmus ; otherwise 

 there is no essential difference between the skeletons of the two 

 genera. 



lines. 



Length of the fii'st vertebra 2 



Width of the first vertebra 4| 



Length of the second vertebra 2 



of the seventh vertebra 2| 



of the fifteenth vertebra \^ 



of the twenty-seventh vertebra 1| 



of the abdominal portion 29 



of the caudal portion 32 



2. Sicyases fasciatus. 



Pete)-s in 3Ionatsher. Berl. Acad. 1859, p. 412. 

 D. 7. A. 7. 



Head and body with alternate dark-green and yellowish cross- 

 bands. The commencement of the dorsal is before that of the anal, 

 and its distance from the caudal equals the length of its base. {Pet.) 



Puerto Cabello. (50 mm. long.) 



3. Sicyases chilensis. 



Tomicodon chilensis, Barnev. Rev. Zool. 1846, p. 144. 

 Gobiesox chilensis, Giiichen. in Gay's Chil. Zool. ii. p. 334. 



D. 7. A. 6. 



Both jaws with incisors, those in the upper somewhat bent out- 

 wards, those in the lower subhorizontal ; one or several canine-like 

 teeth posteriorly on each side of the jaws. Head longer than broad. 

 Subopercular spine very short. Dorsal and anal fins exactly opposite 

 each other. (Barnev.) 



Valparaiso. 



3. COTYLIS. 



Cotylis, pt., 311(11. ^- Trosch. Wicym. Arch. 1843, p. 297, and Hor. 

 Ichthyol. iii. p. 17. 



Anterior part of the body very broad and depressed ; skin tough. 

 Dorsal fin short, situated on the tail. Posterior portion of the ad- 

 hesive disk ^vithout free anterior margin. Teeth of the upper jaw 

 small, not cutting, in several series; no incisors in the lower jaw. 

 GUIs three ; branchiostegals six ; gill-membranes united imder the 

 throat, and not attached to the isthmus. 



Red Sea. Indian Ocean. 



In the greater portion of the species of the genus Cotylis, Miill. & 

 Trosch., the teeth of the lower jaw are not conical and cardiform, 



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