FISHES — EMBIOTOCOIDAE — EMBIOTOCA WEBBI. 



173 



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. 



Plate XXVI, fig. 12, represents the young, taken in the open water of the Bay of San Diego, 

 California. 



List of specimens. 



3. EMBIOTOCA WEBBI, G r d . 

 Plate XXX. 



Spec. Char. — General form ellipsoid. Frontal region sub-concave ; occiput prominent. Anal undulated upon its external 

 margin, its origin being opposite the fifth articulated ray of the dorsal. Tip of pectorals reaching the vertical of the third 

 articulated ray of dorsal fin. Eyes above the medium size. Posterior extremity of maxillary extending to a vertical line 

 drawn at the anterior rim of orbit. Branchiostegals, five on right side, six on the lefl. Fifty-four scales in the lateral line. 

 Olive brown, with indistinct purplish blotches. 



Syn.— £m6to(oc(z weWi, Grd. in Proc. Acad. Nat. Sc. Philad. VII, 1855, 320. 



This species is closely allied to the preceding, the differences consisting in the shape of the 

 head, the cleft of the mouth, the proportional height of the dorsal fin, the insertion of ventrals 

 and anal, the extension of pectorals, and shape and structure of the scales. 



The snout is obtuse ; the posterior extremity of the maxillaries corresponds to a vertical line 

 intersecting the anterior rim of the orbit. The eye is large and circular, a little smaller than 

 in E. cassidii, being intermediate in size between the latter and U. jacksoni. The posterior 

 convexity of the opercle is less prominent than in E. cassidii, being also provided with one more 

 row of scales upon its surface. The rows of scales upon the cheeks do not vary in either of 

 the species so far described. 



The origin of the dorsal fin is exactly opposite the anterior extremity of the base of the 

 pectorals. The spinous portion constitutes three-sevenths of the length of the base of the 

 whole fin. The membrane uniting the spines is more emarginated than in E. cassidii, and the 

 soft portion is anteriorly more elevated than in the latter. The articulated rays of the fin 

 bifurcate but twice. The caudal holds the same relations towards the total length as in E. 

 cassidii, but its rays bifurcate only three times. The anal has the same structure : three spines, 

 ten undivided, and fifteen divided rays, the divisions observed being of the first, second, and 

 third degree. The anterior spine is situated opposite the fifth articulated ray of the dorsal fin. 

 The insertion of the ventrals is under the fourth dorsal spine. The articulated rays of these 

 fins sub-divide three times. The tips of the pectorals extend backwards as far as the third 

 articulated ray of the dorsal ; their rays are thrice bifurcated. 



