390 



BULLETIN" 100, UNITED STATES NATIONAL MUSEUM. 



with black ; the walls of the stomach are black, and those of the in- 

 testines are also pigmented. 



Tabic of measurements in hundredths of length to onus. 



A Ibatross station 



Total length in mm 



Length to anus in mm 



Length ofthead 



Length of orbit 



Width of interorbital 



Width of suborbital 



Orbit to preopercle 



Length of snout 



Length of upper jaw 



Depth of bodv 



Width of body 



Anus to anal 



Anus to ventral 



Ventral to anterovent ral end, pectoral girdle . 



Height of second dorsal spine 



Length of first dorsal base 



Length of first pectoral ray 



Length of second pectoral ray 



Length of outer ventral ray 



Length of gill-rakers 



Number of gill-rakers, left 



Number of gill-rakers, right 



Soft rays, first dorsal 



Pectoral rays 



Ventral rays (both sides) 



5460 



'iis' 



28 

 18 

 33.5 



7.5 

 42 

 23.5 



19 



10 

 35 + 



8.5 



x+19 



6+19 



8 



20 



9-9 



5515 

 271 

 72 

 63 

 15 

 18 



8 

 31 

 17 

 36 

 45 

 24 



9 

 38 

 29 

 31 

 18 



40 + 

 42 + 



6+20 

 6+19 



15 

 9-9 



5526 

 235 

 62 

 64 

 15 

 18 

 8 

 32.5 

 18 

 37 

 47 

 23 

 11 

 37 

 28 



19 



10 



6+20 



6+20 



7 



16 



9-9 



5495 

 203 

 51 

 65 

 16 

 19 

 9 

 31 

 19 

 37 

 46 

 21 

 11 

 39 

 29 



21 



40 + 

 40 



9 

 "9-9' 



5601 

 85 + 

 30 

 66 

 15 

 20 



36 



(furvescens, in reference to the dark color). 



5. BATHYGADUS SULCATUS (Smith and Radcliffe). 



Regania sulcata Smith and Radcliffe, Proc. U. S. Nat. Mus., vol. 43, 1912, 

 p. 108, text fig. 1 and pi. 22, fig. 3. 



List of stations. 



A Ibatrosx 

 station 



5423' 

 5219 

 5423 

 5424 

 5510 

 5527 

 5528 

 5529 

 Lost 



Locality. 



Near Cagayan Island, Jolo Sea . . . 

 Between Marinduque and Luzon 

 Near Cagayan Island, Jolo Sea . . . 



do 



Off northern Mindanao 



Between Siquijor and Bohol 



....do 



....do 



Depth 



in 



fathoms. 



508 

 530 

 508 

 340 

 423 

 392 

 439 

 441 



Bottom 

 tempera- 

 ture. 



°F. 



49.8 

 50.8 

 49.8 

 50.4 

 53.0 

 53.3 

 53.3 

 53.0 



Number 

 of speci- 

 mens. 



1 Type. 



A feAv additions to the original description have been compiled. 



Pseudobranchiae are present, but concealed beneath the skin. 



The inner shagreen-like portion of the premaxillary band of teeth 

 is very definite, and forms a narrow margin along the entire band 

 in the smaller specimens, but disappears anteriorly in the larger 

 type; both portions of the band are widest at the end of the second 

 third of its length; the teeth forming the outer portion are rather 

 coarse, and expanded distally ("arrow-shaped"), but they become 

 much smaller and more crowded posteriorly. 



The form of the interopercle distinguishes B. sulcatus from the 

 other Philippine species of the genus; the lower margin of that 



