rakers as 11 or 12 + 22 or 23, total 33 to 35, 

 the holotype has 11 + 24, total 35.) 



Another of the specimens (YU uncataloged) 

 mentioned by Kamohara and Katayama (1959) 

 was made available to me on loan. This is the 

 specimen on which Katayama (1968) based an 

 osteological study. Because it had been dissected, 

 little of its external morphology could be studied. 

 However, in its extant characters it appears to 

 be conspecific with the holotype of S. katayamai 

 (ZIKU 8206) . Katayama reported small teeth on 

 the mesopterygoid of this specimen (YU un- 

 cataloged) . I did not see teeth on the mesoptery- 

 goids of the holotype (ZIKU 8206), and the 

 skull was missing from the dissected specimen. 

 Katayama (1968) recorded the number of verte- 

 brae in the dissected specimen as 11 + 14 ^ 25. 

 My count of the vertebrae from a radiograph of 

 the same specimen is 10 + 15 = 25. This discrep- 

 ancy is due to differences in determining which 

 vertebra is the first caudal vertebra. (I con- 

 sidered the most anterior vertebra possessing a 

 hemal spine associated with pterygiophores of 

 the anal fin as the first caudal vertebra.) 



The third specimen mentioned by Kamohara 

 and Katayama is in the collections of the Zoo- 

 logical Institute, Kochi University (Kochi, 

 Japan). Although I have not seen this specimen, 

 I presume it to be a representative of S. kata- 

 yamai. 



SEXUAL DIMORPHISM 



Sexual dimorphism is unknown in Symphy- 

 sanodon katayamai. 



COMPARISONS 



Symphysanodon katayamai may be readily 

 distinguished from other species of the genus by 

 its longer depressed anal fin. The relation of 

 numbers of total gill rakers on the anterior gill 

 arch to pored lateral-line scales may be used to 

 separate S. katayamai from all other species of 

 Symphysanodon except S. berry i (table 1). 



DISTRIBUTION 



Symphysanodon katayamai is known only from 

 off Kashiwajima, Kochi Prefecture, Japan. No 

 data on the depths inhabited by this species are 

 available. 



ETYMOLOGY 



This species is named for Masao Katayama, 

 Yamaguchi University, Yamaguchi City, Japan, 

 who made it possible for me to examine speci- 

 mens of Symphysanodon from Japan. 



MATERIAL EXAMINED 

 Holotype 



ZIKU 8206 (163 mm. SL) , collected off Kashi- 

 wajima, Kochi Prefecture, Japan, by S. Noda, K. 

 Amaoka, and T. Hirata, October 15, 1957. 



Other Material, Not Considered as Type Material 



YU uncataloged (one dissected specimen) , data 

 the same as those for holotype. Because this 

 specimen was extensively dissected, I do not 

 consider it a type specimen. 



SYMPHYSANODON MAUNALOAE 

 NEW SPECIES 



Figure 3 ; tables 1 to 4 



Rhyacanthias species, Jordan, 1921 : 648-649, 

 fig. 4 (description of a small specimen, 3% 

 inches in total [?] length, assumed to be the 

 young of Rhyacanthias carlsmithi; comments 

 on three other specimens, 21/4 to 4 inches in 

 total [?] length, referred with doubt to R. 

 carlsmithi; illustration, labeled as Rhyacan- 

 thias carlsmithi (young), presumably of one 

 of the aforementioned specimens; killed by 

 lava flow from Mauna Loa off Alika, Kau 

 District, Hawaii). 



Symphysanodon typus (non Bleeker, 1878), 

 Fowler, 1928: 186 (synonymy of S. typus; 

 description of a small specimen, 58 mm. total 

 [ ?] length, from Alika, Kau District, Hawaii, 

 erroneously considered as a paratype of Rhya- 

 canthias carlsmithi) Weber and de Beau- 

 fort, 1936 : 309, fig. 65 (synonymy referring in 

 part to S. typxis and in part to S. maunalox, 

 compiled description [probably representing 

 S. typus], illustration [of Propoma roseum 

 (= S. typus) after Giinther, 1880], and distri- 

 bution referring to S. typus and in part to S. 



maunalom) Gosline and Brock, 1960: 



183-184, 327 (probably in part; partial syn- 

 onymy of S. typus; characters which can be 

 used to identify Symphysanodon; Hawaii). 



Anderson, 1967 : 2, 11 (compiled meristic 



data referring in part to S. typiis, in part to 



REVISION OF THE GENUS SYMPHYSANODON 



335 



417-060 O - 71 - 11 



