FISHES OF THE PHOENIX AND SAMOAN ISLANDS 261 



KEY TO THE FAMILY TRICHONOTIDAE 



la. Lateral line present, below midaxis at least posteriorly ; lower jaw shortest, 

 snout projecting in front of thin and weak lower jaw ; tip of tongue free, 

 narrow and pointed, not bilobed ; gill membi'aues extending far forward, 



free from istlimus (Limnichthyinae) 



2a. Lateral line along midaxis anteriorly, below it posteriorly, and meeting 



or nearly meeting its fellow behind anal fin ; snout much projecting in 



front of lower jaw ; tip of snout fleshy, protractile lips of lower jaw 



with cirri on sides. 



3(7. Sides of body fully scaled; pelvic rays I, 5, dorsal fin rays fewer than 



30; fewer than 4.") scales in lateral line. 



4a. Dorsal fin rays about 25 or 26; anal 27 to 29; pectoral 13, lower rays 



not separated and different from upper rays; scales in lateral line 



about 40 Limnichthys "" Waite 



4&. Dorsal rays 19; anal 29; pectoral 8+9=17, lower rays longer than 

 and somewhat separated from upper rays ; scales in lateral line 37 



Schizochirus "' Waite 

 2b. Lateral line below midaxis anteriorly abruptly decurved behind pectoral 

 fin, then continuing about halfway from midaxis to base of anal fin 

 along lower side but not meeting its fellow behind anal fin ; snout a 

 little longer than lower jaw and somewhat fleshy ; dorsal origin behind 

 that of anal, over third to fourth anal ray; dorsal rays 35; anal 42; 



pectoral 15; pelvics I, 5 Tewara^ Griffin 



3&. Sides of body not fully scaled, naked at least above and below lateral 



line anteriorly; dorsal fin rays more than 30; about 53 to 00 pores 



and scales in lateral line. 



5«. Pelvic rays I, 4 ; a row of isolated scales in front of dorsal fin along 



middorsal line: a row of scales along base of dorsal fin and along 



base of anal fin posteriorly ; region of caudal peduncle with scales ; 



dorsal rays 34 to 37; anal 35 to 38; pores in lateral line 54 to 57 



Chalixodytes tauensis, new genus and species 



5b. Pelvic rays I, 5; only scales present occur along lateral line. 



6«. Dorsal rays 40 to 43; anal 37 to 39; pores in lateral line 56 to 



00 Crystallodytes cookei enderburyensis, new subspecies 



Gb. Dorsal rays 37 or 38 ; anal 35 to 37 ; pores in lateral line 54 



Crystallodytes cookei cookei '^ Fowler 



1&. Lateral line present or absi'iit ; if pi'^-sont its course is along midaxis and 



not below it; snout either shorter than lower jaw (the latter strongly 



projecting) or lower and upper jaws about same length. 



7a. Body naked ; gill membranes narrowly attached to isthmus free for 



some distance forward ; tongue bilobed ; dorsal rays about 19 or 20, 



about first five simple ; anal about 13 to 15, first ray probably simple ; 



^ Llmnichthus Waite, Rec. Au.str. Mus., vol. ,'5, pt. 3, p. ITS, 1904 (genotype, lAmnichthys 

 fasciatus Waite, ibid., pp. 178-179, pi. 23, fig. 4, 1904, monotypic). — McCulloch, Austr. 

 Zool., vol. 2, pt. ."., p. 102, fig. 27Ga, 1922. 



^ Schizochirus Waite, Rec. Austr. Mus., vol. 5, pt. 4, p. 240, 1904 (genotype, Schizochirus 

 in.'<olens Waite, ibid., pp. 242-243, figs. 33, 34, pi. 2G, fig. 3, 1904, monotypic).— MeCulloch, 

 Austr. Zool., vol. 2, pt. 3, p. 102, fig. 277a, 1922. 



^Tcicara Griffin, Trans. Proc. New Zealand Inst., vol. G3, pt. 2, p. 174-176, pi. 25, upper 

 fig., 1933 (genotype, Tewara cranwelli Griftin). 



2» Crystullodtites cookei Fowler, Ore. Papers B. P. P.ishop Mus., vol. 8, p. 390-392, 1923 

 (type locality : Laie Beach, Oalui) ; Mem. B. P. Bishop Mus., vol. 10, p. 426, fig. 60, 1928. — 

 Pietschmann, B. P. Bishop Mus. Bull. 156, p. 44, pi. 1GB, 1938. 



