1883.] NATURAL SCIENCES OF PHILADELPHIA. 163 



and is curved upwards, and compressed at the base. Both ex- 

 ternal and internal faces are flat. 



Measurements. M. 



Length from base of superior to base of exterior 



inferior spines, inclusive, '008 



Length of superior spine above, .... '003 

 From Willow Creek, Oregon. J. L. Wortman. 

 Cottus pontifex sp. nov. 



The preopercular bone of this species is robust, especially in 

 the transverse diameter. Instead of being flat as in C. divaricatus, 

 it presents two faces on the side which is perforated by foramina, 

 which are separated by a vertical angle. The anteroexterior face 

 is flat, while the posteroexternal is somewhat irregular. The 

 foramina which pierce it are larger than in any other species, 

 especially the one between tihe second and third spines. The 

 foramina communicate below the surface, the canal thus formed 

 being spanned by a narrow bridge from the base of each spine. 

 The opposite side of the preoperculum is a little concave, and 

 plane at the base of the spines. The bases of the superior and 

 the angular spines are closer together than in any other species, 

 being absolutely in contact. 



Measurements. , M. 



Length of three upper spines on bases, incl., . '008 

 Length of joined bases of two upper spines, . '005 



It is not possible to be certain whether there is any anterior 

 inferior spine. One specimen was obtained by Mr. Wortman, 

 probably from Willow Creek, Oregon. 

 Cottus. cryptotremus sp. nor. 



A larger species, very different from the last, and nearer the G. 

 divaricatus. Three preopercula are in my collection. In all the 

 specimens the superior limb is broken off", so that it is impossible 

 to state the character of the superior spine. The angular spine 

 has a round section and is directed backwards, and in line with 

 the inferior border. The two inferior spines are at a little dis- 

 tance from its base, and are well developed, acute, and of equal 

 size. They are directed forwards and inwards. The external 

 face of the inferior limb is divided by a prominent obtuse angle 

 on its entire length. There is a small foramen at the posterior 



