62 PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXVI. 



mailed specimens from Yamashiro ^vol•o presented ]>y the Imperial 

 Museum from the many examples collected ))y Dv. Ishikawa. 



Steindachner^s specimens seem to have been more slender and to have 

 had higher spines than ours. 



(Named for Dr. Franz Steindachner.) 



3. PYGOSTEUS UNDECIMALIS Jordan and Starks, new species. 



Head '6\ to 3| in length; depth 5 to 5i. Dorsal XI or XII (in an 

 equal number of specimens)— 10 or 11; anall-9. Eye 3iin head; snout 

 4; interorl)ital slightly less than diameter of eye. Maxillary reaching 

 slightly past tmterior margin of eye. Depth of head li to If its length. 



Ventral spines yery short and slender, equaling in length two-thirds 

 to three-fourths diameter of eye. The dorsal spines are subequal in 

 length to the next to the last and are scarcely half the diameter of the 

 eye'in length. The last one is about a third higher and is equal in 

 length to the anal spine. 





,-r 



Pig. 1.— Pygosteus undecimalis. 



The body is entirely deyoid of bony plates in our specimens, except 

 in one example where a few plates form a keel on the caudal peduncle. 



Color dark brown above, lighter below, all of the tins dusky. 



lliis species differs from Pygodeus demdachnerl in having a more 

 slender form, a slightly longer head, shorter and more slender ventral 

 spines, and particularly in having more numerous and shorter dorsal 

 spines. The mouth appears to be larger and the caudal peduncle to be 

 thicker. The color is darker. 



Six specimens, the longest 53 mm. in length, presented by the bap- 

 poro Museum, were taken at Chitose in Hokkaido by Mr. Nozawa. 

 The type is No. 7119, Leland Stanford Junior University Museum. 



{undecim, eleven.) 



Family 11. AULORHYNCHID.F:. 



3. AULICHTHYS Brevoort. 



Aidkhthy^ (Brevoort) Gill, Vvov. Aca.l. Nat. Sci. Phila., 1862, p. 234, 

 {ja'po}ilcus). 

 Lateral line with a series of sharply keeled plates, each ending in a 

 spine; pectoral tin not emarginate; ventrals inserted under middle of 

 length of the pectoral tin. 



