322 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



Measurements of D'trcmu furcatum and Diirema airipes in lOOths of length to hase of cau- 

 dal fin. 



Ditrema 

 furcatum. 



Extreme Icugtli 



Lencth to base of caudal 



Bodv : 



ileiglit 



Least height of tail 



Length of caudal peduuclo from end of anal fin 



Head: 



Length 



"Width of interorbital area 



Length of snout 



Length of gill-rakers 



Length of maxillary 



Lengtli of mandible 



Diaiueter of orbit 



Dorsal : 



Lengtli of base 



Length of tifth spine 



Length of highest spine 



Length of highest ray 



Anal: 



Length of base 



Longest ray 



Caudal : 



Middle rays 



Upper lobe , 



Lower lobo 



Pectorals, kngth 



Ventrals, length 



Dorsal ,. 



Anal: \ 



Tubes in lateral line 



Kows of scales above lateral line 



Rows of scales below lateral line 



Inches. 

 10.3 

 8.18 



.39 

 .12 

 .l(i7 



.263 

 

 .07 

 .01 

 .075 

 .075 

 .075 



.512 



.085 



.09 



.12 



.30 

 .06 



.09 

 .256 

 .24 

 .25 

 .155 

 S,25 

 nT,33 

 70 

 5 

 13 



Ditrema 

 atripes. 



Inches. 

 9.15 

 7.35 



.38 



.113 



.23 



.285 

 .082 

 .078 

 .018 

 .075 

 .092 

 .072 



.48 

 .085 

 .010 

 .113 



.275 

 .058 



.095 

 .23 

 .24 

 .26 

 .176 

 X,24 

 in, 29 

 71 

 5 

 13 



The present species was described from two specimens, similar in size, 

 obtained in the San Francisco market, and probably caught in Monterey 

 Bay. Later, about 200 others were obtained at Monterey and Santa 

 Cruz, but the species has not yet been noticed elsewhere on the coast. 



Wc refer this species for the present to the genus Ditrema, of which 

 Phanerodon Girard is considered by us a synonym. 



We have not seen the Japanese type of the genus, Ditrema temmincJci, 

 but in external characters at least it agrees with Phanerodon. 



San Francisco, Oal., March 14, 1880. 



IDESCRSPTIOIV OF A IVJEW SCORPiEI\OII> FISH (SEBASTICHTHYS 

 ilIALiIOER). FROITI THE COAST OF CALIFORNIA. 



By ©AVID S. JORDAN and CHARI>ES H. GII.BERT. 



Allied to Sebastichthys nebulosns and more remotely to Sebastichthys^ 

 vexillaris. Body oblong, moderately robust, the profile with a regular 

 but not very steep slope. Mouth moderate, nearly horizontal, the jaws, 

 equal when closed, the upper jaw somewhat emarginate. Maxillary 

 reaching to near the posterior border of the eye ; premaxillary in front 

 below the level of the eye. Preorbital moderate, its nect about one- 

 third the width of the large eye, with an angular lobe. 



