320 [April, 



ordinary proportions, which they again gradually lose so soon as free from 

 parental sheltering. The posterior portion of these fins is especially to be no- 

 ticed, as longer or deeper than the anterior portion (the reverse of what we ob- 

 serve in the adult,) and extending generally beyond the base of the caudal fin, 

 a character, therefore, not exclusively proper to the genus Rhacocheilus. The 

 spinous portion of these same fins, on the other hand, develop but slowly and 

 gradually, reaching their full growth at a late period. The ventrals and pec- 

 torals are likewise tardy in their appearance. The scales are fully developed 

 before the young leave the ovary. 



Genus EMBIOTOCA, Agass. 



Head of moderate development ; mouth small ; upper jaw slightly the longest. 

 Lips thick and fleshy ; lower one attached by a frenum to the symphysis of the 

 dentary (chin). Intermaxillaries protractile. Teeth in both jaws, short, conical, 

 blunt, slightly recurved and disposed upon one single row. Pharyngeal teeth 

 pavement-like. Spinous portion of dorsal fin generally lower than the soft ; the 

 greatest difference in height between the two being observed upon their conti- 

 guity. Five or six branchiostegal rays. Scales of medium development ; late- 

 ral line well marked, continuous from head to base of caudal, and concurrent 

 with the dorsal outline. No scales upon the fins. 



Syn. Embiotoca, Agass. Amer. Journ. of Sc. Second series, xvi. 1853, 386 ; and 

 xvii. 1854, 366. 



1. Embiotoca jacksoni, Agass. General form subelliptical. Anal broadly 

 rounded upon its ex ernal margin ; origin of latter fin situated opposite the sixth 

 or seventh articulated ray of the dorsal. Tips of pectorals reaching a vertical 

 line intersecting the base of the third articulated ray of dorsal fin. Eyes rather 

 of small than of medium size. Posterior extremity of maxillary reaching a ver- 

 tical line, passing in advance of anterior rim of orbit. Frontal region tlightly 

 depressed above the eyes. Branchiostegals five in number. About sixty scales 

 'in lateral line. Female, uniform dark purplish brown ; male, olive brown, with 



diffused darker blotches.* 



S.yn. Embiotoca jacksoni, Agass. Amer. Jour, of Sc. Second series, xvi. 1853, 

 387 ; and xvii., 1854, 366. Gikard, in Proc. Acad. Nat. Sc. Philad. vii. 1854, 151. 



Locality. San Francisco, Cai. Collected by Dr. A. L. Heermann. 



2. Embiotoca cassidyi, Grd. General form subellipsoid. Frontal region very 

 slightly depressed above the eyes. Anal undulated upon its external margin ; 

 its origin being opposite the third articulated ray of the dorsal fin. Tip of pec- 

 torals reaching a vertical line that would intersect the base of the last spiny ray 

 of the dorsal. Eyes above the medium size. Posterior extremity of the n. axil- 

 lary not reaching the vertical of the anterior rim of the orbit. Branchiostegals 

 six iu number. Fifty-seven scales in the lateral line. Purplish brown, with 

 about twelve transparent bands of a deeper hue. 



Syn. Embiotoca casddyi, Grd. in Proc. Acad. Nat. Sc. Philad. vii. 1854, 151. 

 Locality. San Diego, Cal. Collection of Lieut. W. P. Trowbridge, U. S. A. 



3. Embiotoca webbi, Grd. General form ellipsoid. Frontal region subcon- 

 cave ; 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 the vertical of anterior rim 

 of orbit. Branchiostegals, five on right side, six on the left. Fifty-four scales 

 in the lateral line. Olive brown, with indistiuct purplish blotches. 



Locality. San Diego, Cal. Collection of Lieut. W. P. Trowbridge, U. S. A. 



4. Embiotoca lineata, Grd. Body subelliptically elongated. Anal fin elon- 



* The coloration of this and of all the following species is described as extant 

 on specimens after a long immersion iu alcohol. 



