178 



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



dorsal. The tip of tlie ventrals is black. The upper edge of the spinous dorsal fin is also 

 black. 



Plate XXVI, fig. 11, represents the young of Emhioloca ornafa, size of life, as taken within 

 the body of its parent, from the bay of San Diego, California. 



List of specimens. 



Catal. No. of 

 No. , spec 



541 I 1 



542 ; 1 



543 1 



Sex and 

 age. 



Locality. 



When 

 collected. 



Whence obtained. 



Nature of 

 specimens. 



Collected by — 



Adult...: San Diego, Cal 1853 j Lt. W. P. Trowbridge.. Alcoholic ..' A. Cassidy 



.do.... S. Farallones, Cal 1854 ! do ....do ' Lt. Trowbridge. 



.do I do 1854 do do I do 



G. EMBIOTOCA PERSPICABILIS, Grd. 

 Plate XXXII & Plate XXVI, Figs. 1 & 2. 



Spec. Char. — Body sub-elliptically elongated. Frontal region gently declivous. Eyes of medium size. Posterior extremity 

 of maxillary not quite reaching the anterior rim of the orbit. Anal fin long, its anterior undivided rays longer than the rest, 

 and its origin situated opposite the twelfth articulated ray of dorsal. Tips of pectorals reaching vertical line intersecling base 

 of last dorsal spine. Five branchiostegal rays. Sixty-three scales in lateral line. Deep purplish brown above, lighter beneath. 

 Flanks with light narrow longitudinal stripes i)itersecting the point of union of rows of scales. Dorsal, caudal, anal, and 

 ventral fins reddish purple ; pectorals yellowish. 



Syn. — Embiotoctt perspicabilis, Grd. in Proc. Acad. Nat. Sc. Philad. VII, 1855, 321. 



There is still another species most closely allied to E. lineata, differing from it by a more 

 elongated body, a longer anal fin which is inserted more posteriorly in its relations to the 

 dorsal. The shape of the anal fin, again, is likewise different, being concave upon its outer 

 margin and much deeper anteriorly where only nine undivided rays are observed. The eyes 

 are proportionally larger and the ventral fins situated more backwards. The same general 

 features will distinguish this species from E. ornaia. 



The frontal region forms a continuous curve with the dorsal outline, being, consequently, 

 much less prominent than in both E. lineata and E. ornaia. The head constitutes a little less 

 than the fourth of tbe entire length. The eye, which is large and circular, enters four times 

 and a half in the length of the side of the head. The posterior extremity of the maxillary 

 almost reaches a vertical line drawn in advance of the orbit. There are five branchiostegal 

 rays on either side. 



The greatest depth of the body is rather more than one third of the entire length. The 

 peduncle of the tail is of medium development. A line drawn vertically downwards from the 

 origin of the dorsal fin would inter.sect tlie middle of the base of the pectorals. The .spinous 

 portion of that fin (dorsal) is gradually rising from the first to the eightli spine, and occupying 

 three sevenths of the base of the whole fin. The articulated portion is anteriorly twice the 

 heightof tlie last spine; it gradually diminishes posteriorly. The rays composing it bifurcate 

 twice. The caudal is broadly develoiied, forked, and its rays highly subdivided, since divisions 

 of the sixth degree may readily be observed. The origin of the anal is situated opposite the 

 twelfth articulated ray of the dorsal ; its anterior undivided rays being longer than the rest and 

 gradually diminishing from forwards backwards ; the external margin of that fin assumes a 

 concave outline. Its base is comprised a little over six times in the entire length, instead of 



