NO. 1115. PROCEEDINGS OF THE NATIONAL MUSEUM. 449 



specimen); coiispicuons (large) palmated supraocular flaps; eleventh 

 dorsal spine a little longer than the first; -0 pectoral rays, the 10 lower 

 simple, the next 9 branched, the uj>permost one simi)le. Mis two speci- 

 mens exactly agree in number of tin rays. The plate accompanying his 

 description (both description and plate based on same specimen) gives 

 the V2 lower pectoral rays simple. 



LTnfortnnately, the writer has had only one specimen of Scorpama 

 liistrio from Galapagos Islands and one of ;S^. 2^annosa fioni Panama for 

 comparison. It would be very desirable to have a series for comparison 

 in order to determine the amount of variation in the color and in the 

 other points in which the two species differ from each other. 



SEBASTODES SEMICINCTUS, Gilbert, new species. 

 (Plate LIII, tig. 1.) 



Very closely related to S. .saxicola, from which it differs conspicu- 

 ously in its smaller size, its shar})ly defined cross bars, the smaller head, 

 smaller mouth, and smaller eye, and in the longer and more numerous 

 gill rakers. 



Size small, a female with fully developed ova measuring but 130 mm. 

 in total length ; our largest specimen, 170 mm. Head 2-j^j to 3 in length 

 to base of caudal. Body slender, the depth 3f to 3^ in length. Mandi- 

 ble with a moderate symphyseal knob, which projects to enter the 

 profile. Maxillary scarcely reaching vertical from middle of pupil, L*-| to 

 2| in head. Eye averaging smaller than in & saxicola, 3^ to 3J in head 

 (rarely 3 in head). Interorbital space of moderate width, flat, with a 

 slight median lengthwise groove bounded by a pair of low, rounded 

 ridges, the groove and ridges sometimes not evident. Preo(;ular, supra- 

 ocular, and occipital ridges low, but sharp and evident, terminating in 

 strong though slender si)ines. I^asal, preocular, postocular, tympanic, 

 and occipital spinesjn^esent, the preocular the strongest, directed outward 

 and backward so as to project over the oi bit, Parietals not in contact. 

 Preorbital narrow, with two triangular or rounded lobes with or without 

 slight spinous tips, Preopercular spines with compressed triangular 

 base, the upper two usually nearest together, directed backward or 

 slightly upward, the others backward and downward. A subopercular 

 and an interopercular s]>ine closely approximated. Three "humeral" 

 spines. Gih rakers long, slender, very numerous, developed as movable 

 rakers to the extreme anterior end of the arch. Ten or eleven rakers 

 on vertical limb of anterior arch, 27 on horizontal limb, the longest 

 slightly less than half diameter of eye. In K saxicola, the gill rakers 

 number or 10+22 or 23. D. XII, I, 13; A. Ill, 7. 



Fifth dorsal spine highest, 2^ to 2^ in head, longer than the soft 

 rays, the membranes between spines not deeply incised; the notch 

 between dorsals rather shallow, the twelfth si)ine three fourths to four- 

 fifths length of thirteenth. Caudal emarginate. Second anal spine 

 strong, longer than third, usually not reaching tips of soft rays when 

 Proc. N. M. vol. xix 29 



