Starks: Ichthyoi.o ncAi, Sirvev Anour San Juan Islands. 179 



aiitrriorU, and with a wrll (l('\i'l()i)(_'(l knoh in Iroiit, which closes 

 entirt'U- in front of the prcniaxiUary teeth, and parti>- in front of the 

 ujiiier lip. The preniaxillar\- teeth are in very narrow bands, but in 

 more tlian one series at the side. Anteriorh' the band curves inwardly 

 very strongly, and forms a deep notch; the curve is greater and the 

 notch is much deeper than in Scbaslodes saxicola. The vomer and 

 the front of the palatines ha\e a very few fine teeth, much finer and 

 fewer than in Scbaslodes saxicola ; and their presence is rather diflicult to 

 detect. The interorbital space is considerably more deeply concave; 

 it is without ridges, and its width, including the scaly rim that pro- 

 jects over the eye, and measured just behind the preocular si)ine, is 

 contained 2.1 in the postocular part of the head; 

 the bone is only 2.66 in the same space. The ocu- 

 lar ridges, though rather high, rise very gradually 

 from the interorbital space. The ocular and tym- 

 panic spines are sharp, but not at all slender, and 

 are very much larger and higher from their base 

 than in Sebastodes saxicola. The preocular spines 

 extend outward over the eye much more; the width 

 of the interorbilal (bone only) just behind them is 

 two-thirds of the interorbital width across the tips 

 of the spines. Xo supraocular spine is present. The 

 occipital ridges are very high and sharp, shorter, 

 higher, much more curved as viewed in profile, and 

 the space between them much deeper than in Sebas- 

 todes saxicola; the ridges end behind in rather sharp, 

 but low spines. The preorbital plate is armed below 

 with two sharp angles, but these are not hooked 

 backwards as sharp spines as is the case in Sebasto- 

 des saxicola. The suborbital ring is very narrow, not wider than the 

 first dorsal spine, and narrow^er even than in Sebastodes saxicola. 

 The eye is much larger and the postorbital part of the head shorter; 

 the orbit is much longer than the snout, including the projecting 

 mandible, and ecjual to the distance from its posterior margin to the 

 tip of the upper opercular spine. The preopercular spines are not 

 so slender, and the gill-rakers are slenderer, and anteriorly longer; 

 the longest is contained 2.5 in the postocular part of the head; they 

 number 9 -f 25. The maxillary reaches barely to the middle of the 

 eve. 



Fig. 9. Sebasto- 

 des deani. Top of 

 head. To show 

 spines. 



