NEW COTTID FISHES BOLIN 33 



This species is apparently the smallest of the cottids, the series of 

 specimens evidently representing adults. The largest specimen, a 

 female 28.5 mm in standard length, contains well-developed eggs. 



Eight of the 11 specimens are infested by a copepod parasite of 

 the family Lernaeidae, which attaches itself to the eye. 



PHASMATOCOTTUS,' new genus 



Genotype. — Phasmatocottus ctenopterygius. 



Preopercle armed with four well-developed spines, the upper one 

 enlarged and antlerlike. Gill membranes united, joined to isthmus, 

 forming a fold across it. Branchiostegals 6. Cardiform teeth in a 

 double series on anterior part of premaxillary and dentaries, merg- 

 ing into a wide band posteriorly, widely spaced in a single series on 

 vomer, none on palatines. Gills 3I/2, no slit behind fourth arch; gill 

 rakers in the form of short tubercles. Dorsal spines unconnected 

 by membrane; a single minute spine (?) at origin of anal; pelvics 

 1-2. No scales other than those of lateral line. Lateral line pores 

 double. 



This genus probably represents an ancient offshoot from the 

 Zestdcelics line of development, 



PHASMATOCOTTUS CTENOPTERYGIUS.8 new species 



Figure 7 



Head and anterior part of body depressed, posterior part subcir- 

 cular in section ; body deepest at anterior end of first dorsal, distance 

 from origin of first dorsal to pelvic base 2,1 in head ; width at dorsal 

 end of pectoral base 1,9 in head. Ventral body contour gently 

 rounded anteriorly; dorsal contour and posterior part of ventral 

 contour forming almost straight lines from origin of first dorsal 

 and from anus, respectively, to caudal peduncle, the least depth 

 of which is 2.3 in orbit. 



Head 2.6 in standard length ; snout 1,3 in orbit, not steep, forming 

 an angle of about 58° with chin, of about 138° with frontoparietal 

 region; mouth terminal, lower jaw equal to upper; maxillary ex- 

 tending to slightly beyond anterior margin of pupil. Anterior and 

 posterior nostrils in short tubes the anterior ones almost as long as 

 nasal spines, posterior ones about half as long. Size of eye moderate, 

 diameter of orbit 3.0 in head, Interorbital space narrow, about) 

 1.3 in posterior width of maxillary; top of head gently concave. 

 Nasal spines small, sharp, erect, their length equal to about 0.7 

 interorbital space; a pair of very small but sharp spines on top 



* From <^a<rpa, specter + Coitus. 



• From KTtyi^oi, to comb + Trr^pOyio;-, fin. 



