28 



PROCEEDINGS OF THE NATIONAL MUSEUM 



mandible and always visible, even in closed mouth ; rami of mandible 

 well elevated inside mouth; no teeth on palate; tongue small, entire, 

 rounded and free in front; intcrorbital narrow, bony width two-fifths 

 of eye, flattened. Preopercular spine curved back and up terminally, 

 ends in strong spine, and two spines curved up and back on its upper 

 edge. Opercular flap extends well back on pectoral base. 



Lateral line complete, little high at first, becomes axial along side of 

 tail. 



D. IV-9, I, spines not free, short, flexible, first 2% in total head 

 length, first ray 2; A. 10, i, first ray 2%; caudal 3K in rest of fish^ 



H.W.F.del 



Figure 16. — Eleutherochir mccaddeni, new species. Type. 



rounded convexly behind; least depth of caudal peduncle 3^5 in headp 

 pectoral 1%, rays 20; ventral rays I, 5, fin 1}^ in total head length. 



Color in alcohol, back and upper surfaces dull brown, everywhere 

 more or less finely specked, dotted and spotted with darker, though 

 markings nowhere- much contrasted. On sides of head and opercle 

 they are larger, coarser, and fewer. All over back above traces of 

 dark arcs and circles, nowhere prominent. Entire under surfaces 

 whitish, with dull-gray or brown tints. Eyes dark gray above, with 

 dark blotches and mottling, pale to whitish below. First dorsal gray 

 black, with some obscure pale blotches on first membrane. Second 

 dorsal pale, with two dark spots on each ray. Caudal pale or light 

 brown, with five transverse dark bars, last subtenninal and empha- 



