104 CAUKOliNIA ACADEMY OF SCIENCES 



W'l' liavo coin pa rod lliis species with .\. agtiKsizii from the (Jalapaj^os Tslaixls, 

 1111(1 lind it to (lilTor in haviiij; fewer scales, a larj^er eye ami a sliortcr pectoral liii. 

 A', aijdxsizii lias aS to (Jl scales; (he eye is conlaiiieil 3.\ to 3}; times in the licad; (he 

 pectoral reaches to heyond tlic orii^in nl llif ;in;il. 



Family 1 1 .K.M f Id 1 ).]■:. 



192. Haemulon scudderi Gill. 



Tlic most abundant species of the gcnns at Panama. 



In ci<;lit lialf-^rown specimens, five have 11 dorsal spines, three have 12 

 dorsal spines. In thirty-six young specimens, with the streaks and caudal spot 

 still conspicuous, thirty-three have 11 dorsal spines, three have 12 spines. The 

 articulated dorsal rays are K! or 17 in niinihcr; the anal rays 7 or 8. In twelve 

 specimens from Mazatlan, ten have 12 spines, two have 11. 



In young specimens, are three well-developed streaks and one itidimenlary 

 one. The uppermost starts on the median line of occiput, runs to the spinous 

 dorsal, and is continued along each side of the base of the dorsal, gnidually growing 

 fainter and disappearing before reaching the second dorsal. A pair begin just 

 inside the nostrils, run just above the eyes, diverging backward to a point opposite 

 the origin of the dorsal, thence converging to the base of the last dorsal ray, behind 

 which the iiair unite on upper median line of caudal peduncle, on which they reach 

 base of iijipcr cimdal rays. Another pair begin at tip of snoiil and cxleiid backward 

 through eye to middle of caudal peduncle, where they become faint or entirely 

 disappear. A faint streak extends backward from u])per margin of orbit to begin- 

 ning of lateral line, along the anterior part of which it may be faintly indicated. A 

 large black oval spot three-fourths the size of the eye is half on the caudal pcdniicle, 

 half on the base of the fin. Comparing these streaks, which disappear in adults, 

 with the permanent coloration in //. inncvoi^tnmum, we find them characterized by 

 the rudimentary condition of the streak along (or just below) the lateral line, and 

 the total absence of a streak, present in macro?,tomum, lunning from above eye along 

 sides ju.st above the lateral line. 



//. itrinhlcri differs from its Atlantic representative If. pnrra: (1) In having 

 usually 11 dorsal spines instead of 12; (2) In having longer falcate pectoral (ins, 

 which extend beyond the tips of the ventrals, and are nearly devoid of scales; (3) 

 In the greater compression of occiput and nape, forming a crest which may l)c traced 

 in adults to the interorbital space; (4) In the greater compression of the snout, 

 which is also produced upward at tip, so that in adults the upper profile of snout and 

 head as far as occiput is concave. In 11. i^arrn, the dorsal spines are normally 12. 

 In but one specimen of parra out of sixteen examined, have we found 11 spines, a 

 number which seems not to be recorded for the species. The pectoral fins are short 

 and rounded, not reaching tips of ventrals. They are very densely covered with 

 scales to their tips, both membranes and rays being comi)Iet(!ly invested. The 

 ventrals also are much more densely scaled than in i<cud.deri. The occiput, nape 

 and snout are transversely broadly rounded in Ixith young and old specimens, while 



