174 



U. S. p. R. R. EXP. AND SURVEYS — ZOOLOGY — GENERAL REPORT. 



Formula of tlie fins : 



Male: Br. VI: V; D IX, 21 ; A III, 10 + 15 = 25 ; C 3, 1, 6, 6, 1, 2 ; V I, 5 ; P 20. 



The scales are a little higher tlian long, in that respect differing from those both of E. 

 jacksoni and U. cassidii, and, moreover, to be distinguished from the latter by a smaller number 

 of radiating furrows upon their anterior section. The dorsal furrow commences under the second 

 ray of the soft dorsal, terminating under the sixteenth ; the sheath above it is comj^osed of two 

 rows of scales anteriorly, and of one posteriorly. 



The ground color is dusky brown above, yellowish brown beneath, with cloudy patches of 

 reddish brown. The pectorals are yellowish, the dorsal, caudal, anal, and ventrals purplish 

 and yellowish ; a yellow streak is observed along the base of the soft portion of the dorsal. 



This species inhabits the bay of San Diego, together with the preceding species. 



Plate XXX, fig. 1, represents a male specimen o? Bmbiotoca ivebbi, size of life. 



Fig. 2 is a section across the line of greatest depth. 



Fig. 3, a scale from the dorsal region. 



Fig. 4, a scale from the lateral line. 



Fig. 5, a scale from the abdominal region. 



Figs. 3, 4, and 5 are magnified. 



List of specimens. 



Catal. 

 No. 



No. of 

 spec. 



Sex and 

 age. 



516 



Adult. 



Locality. 



When collected 



San Diego, Cal 



1S53 



Whence obtained. 



Lieut. Trowbiids'e . 



Nature of fpecimens. 



Collected by- 



Alcoholic . A. Cassidy. 



4. EMBIOTOCA LINE AT A, Grd. 

 Plate XXXI and Plate XXVI, Figs. 5 & 6. 



Spec. Chah. — Body sub-clliptically elongated. Anal fin elongated, with external margin nearly straight, diminishing gradually 

 in deptli posteriorly, its origin being opposite to the sixth articulated ray of the dorsal. Tip of pectorals reaching a vortical 

 line intersecting the base of last but one dorsal spine. Eyes of medium size. Posterior extremity of maxillary oven with the 

 vortical of anterior rim of orbit. Frontal region slightly depressed above the eyes. Branchios'.egals five in number. Sixty-two 

 scales in lateral lino. Ground color of upper region dark olive or reddish brown ; reddish yellow beneath. Sides of abdomen 

 with light longitudinal stripes intersecting the point of union of the rows of scales. Anal deep purple, with a yellowish vitti at 

 its base. 



St}i.—Kii\biolnca lineala, Grd. in Proc. Acad. Nat. Sc. Philad. VII, 1854, 134, and, 151 ; also, VII, 1855,320. 



The head constitutes the fourth of the length, excluding the forked portion of the caudal fin. 

 The snout is sub-conically rounded, the angle of the mouth, or rather the posterior extremity 

 of the maxillary extending to a vertical line drawn immediately in advance of the orbit. The eye 

 being of medium si!5c, its diameter enters four times in the length of the side of the head. The 

 nostrils are placed nearer to the eye than to the end of the snout. The scales on the cheeks 

 constitute three distinct sub-concentric rows, the innermost being the largest ; two scales 

 indicate a fourth row upon the concavity of the preopercle. The opercle is higher than broad, 

 and covered with about six obliquely vertical rows of scales extending downwards upon the 

 sub-opercle, which is closely united to the former. Upon the interoperclc the scales are much 



