332 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



4. But two suprascapular spines, the lower anterior spine wanting 

 in this species but present in all specimens of S. saxicola. 



5. Second anal spine much longer and more curved. 



6. Pectorals shorter, not extending beyond tips of ventrals. 



7. Two conspicuous dark bars diverging backwards from orbit. 



8. Dark bars on body more pronounced. 



Length of head from tip of upper jaw to the margin of opercular 

 membrane 2.7 in total length without caudal; greatest depth of body 

 3. Length of snout 4 in head, equal to the least interorbital width; 

 diameter of orbit 3; length of maxillary 2.2; length of second anal 

 spine equal to length of snout and eye. 



Dorsal, XIII, 14, the last ray cleft to base; anal, III, 7; pectoral 

 normally of 9 divided and 8 lower simple rays, the type with 9 simple 

 rays on one side. Pores in lateral line 41 on one side, 44 on the other. 



Mandible strongly protruding, entering the profile, with a well-de- 

 veloped symphyseal knob; maxillary broad, subtending anterior 

 three-fourths of the pupil; interorbital region broad, nearly flat, the 

 supraorbital ridges but little elevated, the inner pair of frontal ridges 

 inconspicuous, diverging backwards. Preocular spine strong; supra- 

 ocular ridge short, depressed, ending in a well-marked postocular 

 spine; tympanic spine present, inconspicuous; parietal ridges sharp 

 but low, moderately diverging, ending in slender spines. Preoper- 

 cular spines flattened, triangular, the upper three directed backwards, 

 the fourth and fifth somewhat obliquely downwards. Suborbitals 

 extremely narrow; preorbital with two rounded lobes, the posterior 

 lobe with an obsolescent spinous point, or with none; subopercle 

 and interopercle with spines obsolescent or wholly wanting. Teeth 

 in narrow bands, those on palatines in about two rows; the anterior 

 series in the premaxillaries a trifle enlarged. 



Gill-rakers long and very slender, the longest half the orbital diam- 

 eter, 10 or 11 on vertical limb, 24 on horizontal limb of outer arch; 

 no immovable rudiments present. 



Scales weakly ctenoid, those on head, breast, and along bases of 

 vertical fins much reduced in size. Bands of very fine scales accom- 

 pany the dorsal spines; fine scales envelop all the other fins nearly or 

 quite to their margins. Top and sides of head wholly scaled, includ- 

 ing snout, preorbital, maxillary, mandible, median portion of gular 

 membrane, and the upper 4 branchiostegal rays. Pores in lateral 

 line corresponding with the series of scales running very obliquely 

 downward and backward from dorsal outline to lateral line. 



Spinous dorsal low, evenly rounded, the membranes not deeply 

 incised, the fourth and fifth spines about equal, 2.4 in length of 

 head; outline of fin not deeply notched, the thirteenth spine equaling 

 diameter of orbit, the twelfth more than two-thirds its length. Sec- 

 ond anal spine very long and strong, much heavier and longer than 



