484 



PROCEEDINGS OF THE NA TIONAL MUSEUM. 



VOL. XXXI. 



iig. LYSODERMUS SATSUM^ Smith and Pope, new species. 



Head, o.T) in lenoth without caudal; depth, 3.5; eye, 4.75 in head; 

 niaxillaiy, 2.25; dorsal, vii, 12; anal, ii, 9. 



Fbrni elono-ate, conipi-essed, especially in dorsal region, so that body 

 in cross section is triangular; dorsal and ventral outlines similar, cau- 

 dal peduncle short, its least depth equal to snout; head pointed; mouth 

 moderate, maxillary extending as far as anterior margin of eye, lower 

 jaw strongly projecting; minute villiform teeth in bands in jaws and 

 in two separated patches on vomer, none on palatines; a row of, six or 

 more tentacles on cornea above pupil; numerous blunt, Heshy papilhu 

 on maxillary, mandible, cheeks, opercles, throat, and isthmus; a patch 

 of papilliform tentacles on under side of tip of mandible, a single 

 papilla about diameter of pupil posterior to the ]iatch on each side, 

 and more posteriori}^ another single papilla about half diameter of eye 

 on each side; bones of head rough iuid deeply sculptured; interorbital 



^y^ ^ ^ -%^^ 





Fig. 7.— Ly,-()1if.i:ml's satsum.k. (From the type, i 



space deeply concave, as wide as orbit, with 2 longitudinal ridges, 

 between which is a slight median ridge which divides and diverges 

 posteriorly; a long, sharp preorl)ital spine reaching to end of maxillary 

 and a smaller spine in front pointing downward; suborbitals wide and 

 deeply striated; nasals ending above in produced angles, but not in 

 spines; a transverse depression on to]) of head behind e}^; parietals 

 produced in wide, blunt ridges which end behind in blunt spines; a 

 postorbital ridge extending on posttemporal and ending in a spine; 

 opercle with 2 concealed spines; preopercle with a large, horizontal 

 spine reaching to branchial opening and 4 shorter spines below; 

 gill-rakers small and blunt, i) on lower limb of first arch; skin 

 smooth to the touch, containing rudimentary embedded scales and very 

 loosel}' attached to underlying tissue and investing all the fins more or 

 less completely except their tips; lateral line continuous but incon- 

 s})icuous, only 3 small pores developed anteriorly; a single dorsal 

 fin Without notch separating the two parts, beginning posterior to head; 



