FAMILY LABRIDAE — SCHULTZ 229 



adult hortulanus. The most remarkable change is that of the dark 

 ocellate spot in the soft dorsal fin which breaks up to help form the 

 light round spots surrounded with dusky pigment in the basal half 

 of the dorsal fin. 



In attempting to straighten out the nomenclature as the result of 

 the discovery that notophthalmus is the young stage of hortulanus, 

 specimens were examined from numerous localities in the Indo- 

 Pacific. It was observed that our specimens from Mauritius differed 

 from those of the tropical Pacific in having a small but distinct dark 

 caudal spot, beautifully illustrated by Riippell (Neue Wirbelthiere 

 zu der Fauna von Abysinnian gehorig, Fische, p. 16, pi. 5, fig. 1, 

 1835) under the name Halichoeres epimius, for a Red Sea specimen. 

 Since Lacepede was the first to describe Labrus centriquadrus (Histoire 

 naturelle des poissons, vol. 3, pp. 437, 493, 1802; type localities, Mada- 

 gascar, Mauritius, Reunion) I herewith restrict the species to the 

 form with the dark spot in the dorsal part of the caudal fin base, on 

 the basis of 3 specimens from Mauritius, USNM 19994 and 130984. 



The two species, centriquadrus and hortulanus may be distinguished 

 by the key on p. 224. 



The smallest specimen I have seen of this species is 16 mm. long, 

 from Morotai Island. It has the same coloration as those 26 to 27 mm. 



HAUCHOERES TRIMACULATUS (Quoy and Gaimard) 

 Plates 102,E; 106,C 



JmZ^s frt'macuZoto QuoT and Gaimard, Voyage de . . . V Astrolabe . . . , Zoologie, 

 vol. 3, p. 705, pi. 20, fig. 2, 1834 (type locality, Vanikolo). 



Guntheria trimaculata Bleekeb, Atlas ichthyologique . . . , vol. 1, p. 138, pi. 32, 



fig. 1, 1862 (Cocos, Celebes, Sangi, Flores, Buru, Amboina, Haruko, Banda, 



Goram, Letti). 



SPECIMENS STUDIED 



Bikini Atoll: 25 stations, 385 specimens, 10 to 130 mm. in standard length. 



Rongerik Atoll: 5 stations, 31 specimens, 20 to 118 mm. 



Eniwetok Atoll: 6 stations, 77 specimens, 16 to 98 mm. 



Rongelap Atoll: 13 stations, 216 specimens, 26 to 219 mm. 



Likiep Atoll: 1 lot, Univ. Washington, 6 specimens, 30 to 53 mm. 



Guam: 6 lots, 67 specimens, 28 to 93 mm. 



Rota: 2 lots, 13 specimens, 20 to 58 mm. 



Description. — Certain counts are recorded in table 105. 



Head 2.7 to 3.0; greatest depth 3.2 to 3.3; longest pectoral ray 4.3 

 to 5.0; snout tip to anus 1.7 to 1.8; to dorsal origin 2.8 to 3.1; all in 

 standard length. Snout 2.7 to 3.6; eye 4.1 to 6.0; postorbital length 

 of head 1.9 to 2.0; interorbital space 4.7 to 5.6; longest pectoral ray 

 1.6 to 1.7; least depth of body 2.0 to 2.1; all in length of head. Dis- 

 tance between anterior and posterior nasal openings 5 to 8 in snout. 

 Eye 0.8 to 1.4 in interorbital space. 



