216 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 9 



Kathetostoma ornatus, new species 

 Plate 29 



Holotype.—AUF no. 918. 



Type locality. — Station 1119-40, 5 miles south of San Benito Islands, 

 Lower California, Mexico, dredged in 87 fms, on sand bottom, February 

 19, 1940. 



Paratype. — AHF no. 919. 1 specimen, 72 mm, same locality as holo- 

 type. 



Measurements of holotype in mm. — Total length 113, standard 

 length 90.5, depth 28.6, body width behind pectoral base 24, head 35, 

 head width at preopercle 32, cheek depth 15, eye 7, interorbital 9.5, 

 snout 6, width between bases of humeral spines 23.9, maxillary 17, 

 length of premaxillary groove 7, width of premaxillary groove 5.5, 

 predorsal length 48, dorsal base 33, dorsal height 17.2, anal base 28.5, 

 pectoral length 27, ventral length 20. 



Diagnosis. — Dorsal 15 or 16, spinous dorsal absent. Anal 13 or 14, 

 pectorals 20 or 21, ventrals I, 5, caudal 20 or 21. Depth 3.17 to 3.28 in 

 standard length, head 2.66 to 2.96. Predorsal length 1.85 to 1.96 in 

 standard length. Maxillaiy 1.81 to 2.06 in head, eye 5 to 5.1, inter- 

 orbital 3.65 to 3.9, snout 5.83 to 6.02. 



Description. — Body heavy, robust, and depressed anteriorly, tapering 

 rapidly to the slender, slightly compressed caudal peduncle. Dorsal and 

 ventral outlines bluntly rounded anteriorly. Depth 3.17 to 3.28 in 

 standard length. Head large, 2.66 to 2.96 in standard length; broadly 

 flattened dorsally, width at preopercle almost equal to its length. 



Dorsal 15 or 16, origin slightly nearer caudal base than tip of snout. 

 Dorsal spines absent. Predorsal length 1.85 to 1.96 in standard length. 

 Greatest dorsal height more than depth of cheek. Anal 13 or 14, origin 

 under third or fourth dorsal ray. Anal base shorter than dorsal base. 

 Ventrals I, 5, inserted before pectoral base midway between eye and 

 humeral spine. Two small, antrorse spines on breast before base of 

 ventral fins. Caudal 20 or 21, edge of fin rounded. Pectoral rays 

 branched, 20 or 21, fin broadly rounded. 



Mouth large, vertical. Maxillary 1.81 to 2.06 in head, barely reach- 

 ing a vertical from anterior edge of eye. End of maxillary widely 

 expanded and not hidden under the edge of the preorbital. Premaxil- 

 laries slightly protractile; premaxillary groove longer than wide, equal 

 to or almost equal to diameter of eye. End of groove extending to 



