102 PROCEEDINGS OF THE ACADEMY OF 



Genus Sicyogaster Gill. 



Corpus alepidotum, antice subcylindricum, inde versus caudam lente at- 

 tenuatum. 



Caput oblongum depressum, altiore latius, antice rotundatuni. Oculi in 

 parte subanteriori positi. Os mediocre, horizontaliter fissum. 



Dentes in maxilla utraque serie regulare unica dispositi ; dentes circa 

 maxillae superioris partem anteriorem approximatae, apicibus lateraliter dila- 

 tatis, tricuspidatis, cuspa mediana majore, subrotundata ; dentes laterales 

 pauciores, remotiores, simplices, subcylindrici et paulo recurvati. Dentes 

 maxillae inferioris partis anterioris subcylindrici recurvatique, remoti. Dentes 

 labiales tenuissimi adsut. 



Pinnae dorsales duse, prima radiis valde flexibilibus ; pinna caudalis mar- 

 gine rotundata ; pinnae ventrales postice bene conjunctae, antice funiculo mus- 

 culari spinas connectente et membranae marginem formante praeditae. 



Hoc genus a Sicydio Val., valde differt corpore omnino alepidoto, dentibus 

 trilobatis crassis in maxillae superioris parte anteriore et dentibus maxillae in- 

 ferioris subaequalibus. 



Eo referenda est unica species. 



Sicyogaster c o n c o 1 o r Gill. 



Caput longitudinis totius partem quintam formans, altitudihe sui longitu- 

 dinis dimidiam superante. Maxilla superior circiter dentibus tricuspidatis 

 sexdecim et latere utroque circiter dentibus simplicibus quatuor vel quinque 

 armata ; maxilla inferior circiter dentibus simplicibus remotis decim praedita, 



D vi, 11 ; A 10 ; C + 15+ ; P 15 V i, 5 +5 i. 



Color subpurpureus ; pinnae analis et ventrales submargaritaceae, analis pur- 

 pureo marginata. 



Habitat cum Sicydio Stimpsoni in aquae dulcis rivulis saxis adhaei'ens. 



In specimine unico in collectione, labium inferior dentes graciles pancos 

 liabet. 



Honograph of the Genus LABROSOMUS Sw. 

 BY THEO. GILL. 



In the genus Clinus as proposed by Cuvier, and even as revised by Valen- 

 ciennes, there are dissimilar types which yet remain to be named and elevated 

 to the rank of genera. Among the species of this group, described by the latter 

 naturalist in the eleventh volume of the " Histoire Naturelle des Poissons," 

 there are several species which are distinguished by the presence of superciliary 

 tentacles, and of a transverse pectiniform series of filaments on the nape. 

 Those fishes provided with such appendages, have at the same time a much 

 less inequality between the spinous and soft portions of the dorsal than the 

 typical Clini, and the teeth in the outer row are much stronger. They would 

 therefore be correctly referred to a genus which is quite distinct from Clinus. 

 For this genus, the name Labrosomus, first proposed by Swainson, must be 

 adopted, but the characters given by that author to it are not the proper 

 generic ones, and the greater number of the species referred to it are not con- 

 generic with its type. 



The name of Labrosomus (or Labrisomus) was first published in 1839, in the 

 second volume of the "Natural History of Fishes, Amphibians and Reptiles." 

 At the seventy-fifth page of that volume, Swainson has divided the Cuvieran 

 genus Clinus into five genera : Clinus, of which the Clinus acuminatus 

 Cia\, is taken as the type; Labrisomus with Clinus pectinifer Val., as 

 type ; Tripterygion Risso, Cliniirachus Reese, which is typified by Blennius 



[April, 



