ADDENDA 88. SPARIDJE ARGYROPS. 9 '2 9 



Page 557. The groups called Stcnotomus and Lagodon should 1;;> 

 recognized as genera distinct from Diplodm, and the prior Argyrops* 

 Sw. (Class'n Fish, etc., 1839, 221; type Sparus spinifer Forsk.) should 

 probably be used for the former. 



Page 557. The species called in the text Sparus chrysops and Sparux 

 aculcatus are identical. The species belongs to the genus Argyrops, 

 and should stand as: 

 8O. A. cBavysops (L.) J. & G. Southern Porgcc. 



Differing from the common northern scup, A. versicnlor\ (Mitch.) J. & 

 (T. ( = 8. argyrops Auct. not of Linn.), in the following respects: 



Body more elongate and less elevated anteriorly; molar teeth 

 coarser; size larger. Head 3j depth 2. D. XII, 12; A. Ill, 11; 

 scales 7-48-14. L. 18 inches. Cape Cod to Florida. The specimen 

 described iu the text (25170 U. S. Nat. Mus.) is unusually deep-bodied 

 for this species. ' 



Page 557. After Argyrops versicolor add: 

 881 (ft)- A. caprioius (Bean) J. & G. Goat's Head Porgce. 



Light olive; silvery below; the young with faint very narrow darker 

 bars. Body subovate, the back anteriorly much more elevated than in 



*The cranial characters of Argijrops are very different from those of Dij>lodiis, as 

 is shown by the following account of the skulls of the two genera, kindly furnished 

 to us !>y Professor Gill : 



In Diplodtts "the skull is extended downwards to the chevron of the vomcr, and is 

 notched on each side behind the forehead; the parasphenotd has a varying inferior 

 crest, which is entire near its posterior decurrent processes; forehead broad, well de- 

 fined, convex transversely above the orbits, abruptly terminated behind by the con- 

 vergence of the external lateral crests into the occipital, the occipital crest ending 

 abruptly behind the forehead, and thickened with vertical osseous striae; the inner 

 as well as outer lateral crests erect and laminar, and converging more or less forwards. 



"In Diplodus proper the forehead is moderately broad and the bones contracted 

 forwards, the parasphcnoid with a superficial inferior crest, convex forwards, arid 

 little developed posterior decurrent processes. 



"In Arcliosargns Gill, the forehead is very broad and the bones wide and almost 

 even "with the pref rentals in front; the parasphenoid with a deep inferior crest, and 

 omarginated anteriorly and with enlarged posterior decurrent processes. 



"In the genus Slenolomits (Argyrops) the skull is extended forwards to the head of 

 the vomer and notched on each side behind the forehead; the parasphenoid has the 

 inferior crest low, and little developed posteriorly-decurrent processes; the forehead is 

 narrow and ill-defined behind, its surface of compact texture, but with a few foramina; 

 and two longitudinal grooves on each side; the occipital crest moderate, extending but 

 little forward of the supraoccipital bone, and not overhanging backward; the crest 

 strengthened by a longitudinal lateral ridge on each side, terminating backwards iu 

 mamilliform projections, the inner and outer lateral crests not procurreut on the fore- 

 head." 



t Lalrus versicolor Mitch., Trans. Lit. and Phil. Soc., 1815, 1, 404. Sparus argyrop*- 

 L. is the young of A. chrysops, with 2d and 3d dorsal spines filamentous. 



