PHILIPPINE MACROUROID FISHES—GILBERT AND HUBBS. 507 
39. COELORHYNCHUS COMMUTABILIS Smith and Radcliffe. 
Coelorhynchus commutabilis typical form SmirH and RADCLIFFE, Proc. 
U. S. Nat. Mus., vol. 43, 1912, p. 128, text fig. 2 (part). ~ 
Coelorhynchus commutabilis form alpha SmMirH and RapcuiFFe, Proce. U. S. 
Nat. Mus., vol. 13, 1912, p. 180, text fig. 3. 
Coelorhynchus commutabilis form delta SmMiTrH and RaApcLIFFE, Proc. U. S. 
Nat. Mus., vol. 43, 1912, p. 182, text fig. 6. 
Coelorhynchus commutabilis form eta SMITH and RaApcrirre, Proce. U. S. 
Nat. Mus., vol. 43, 1912, p. 132, text fig. 7 (two specimens, exclusive of 
. type). 
After having described C. commutabilis, Radcliffe proceeded to de- 
fine certain “forms,” differing from the typical specimens in the 
presence or absence of scales on the underside of the head, and in 
the form and proportions of the snout and orbit. The discovery of 
certain diagnostic characters, such as those we emphasize in the 
analytical key to the species, has led us to a different grouping of 
these variants. In order to indicate the relation between these 
“forms” of Smith and Radcliffe and the species, as we define them, 
the following comparative table has been prepared: 
Identification by Smith and Radcliffe. Present reference. 
Coelorhynchus commutabilis. 
C. commutabilis. 
MUR VLC HAGE ONMIR etsy ett sae eee wre sake tere ieee ais Makers swh Misi aelacgaree OL capi 
LENG) ERIN ELIG AN) dees a ke Se ah a fe a a ee eR Da C. commutabilis. 
PHROTITAN ECL ee eee oa RB Bier TI era eo a ce Be C. radcliffe. 
UDR AAT CLE apc Rea BRS a SS nm Ne TE Lh arm LORE PA Raine C. radclijfei. 
PGR TAUELE LE Dace ne we ee Set eRe ee IE eee ta en eee ois Eis) See C. commutabilis. 
SOVETMCE Eee sear ese ed SL at NT eee ot ea ek bes ae ee ea C. weberi. 
LC. commutabilis. 
The statement that mutation has been demonstrated in this case? 
therefore appears to lose its significance. 
List of stations, 
. Bottom | Number : . 
Albatross a7 tf Depth in : Identification by 
station. Locality. fathoms. teeepere OF SDE: Smith and Radcliffe. 
a OE 
ol/(2 |) Vicinity Of Jolo Island. 223.225.2422 S185 |25sesas: 1 | Type, delta. 
5348 | Palawan Passage........-.-..--..--.- | 375 56. 4 1 | Type, commutabilis. 
D4445| (OfienstermMDzOm ie soc 94-2 2. 32S ket | 308 45.3 1 | Form eta. 
5445 |... GOEh- CGE Supe ae iano eae 383 44.3 1 Do. 
5589 | Near Sibuko Bay, Borneo............. 260 45.7 1 | Type, alpha. 
5589 |....- OO erase eicinstin eee Rams ese ce at | 260 45.7 4 | Form alpha. 
5590 |...-- (MOSES NT. SES dS ERE Eee 8 | 310 44.3 1 Do. 
5590 |...-. 10 Ee i Sere Neca cae meee | 310 44.3 2 | Commutabilis. 
This species, as we recognize it, is now redescribed in some detail. 
The description is based upon the type-specimen, 129 mm. long to 
anus, and is supplemented and verified in all points by an examina- 
tion of each of the other 11 specimens. 
1 See Radcliffe, p. 130. 
