220 The Philippine Journal of Science 1923 



This specimen was collected at either Puerto Galera or Cala- 

 pan, Mindoro. 



This eel has the dorsal margin characteristic of Gymnothorax 

 hepaticus or albimarginatus, and of some specimens of Gymno- 

 thorax flavimarginatus, but lacks the very high dorsal character- 

 istic of the first two while the relative proportions of depth and 

 length are very different. 



It is probable that the Mursena hepatica of Weber and Beau- 

 fort and their Mursena boschi overlap and include five nominal 

 species, and that a full series of living material would result in 

 the recognition of three distinct species. 

 Gymnothorax undulatus (Lacepede) . Plate 9, fig. 1. 



Murssnophis undulata Lacepede, Hist. Nat. Poissons 5 (1803) 629, 



644. 

 Mursana fimbriata Bennett, Proc. Comm. Zool. Soc. 1 (1831) 168. 

 Mursena bullata Richardson, Zool. Voyage Erebus and Terror, Fishes 



(1844-48) 86. 

 Mursena caneellata Richardson, Zool. Voyage Erebus and Terror, 



Fishes (1844-48) 87, pi. 46, figs. 1-5. 

 Gymnothorax isingUenoides Bleeker, Atlas Ichth. Murasn. 4 (1864) 



91, pi. 35, fig. 1; pi. 36, fig. 1. 

 Gymnothorax bullatus Bleeker, Atlas Ichth. Murasn. 4 (1864) 91, 



pi. 27, fig. 2; pi. 43, fig. 3. 

 Gymnothorax cancellatus Bleeker, Atlas Ichth. Mursen. 4 (1864) 93, 



pi. 32, fig. 3; pi. 33, fig. 2; pi. 39, fig. 1. 

 Gymnothorax agassizi Bleeker, Atlas Ichth. Muraen. 4 (1864) 95, pi. 



41, fig. 2. 

 Mursena fimbriata Day, Fishes of India (1878-88) 670, pi. 172, fig. 1. 

 Gymnothorax undulatus Jordan and Evermann, Bull. U. S. Fish 



Coram. 23 (1903) (1905) 98, pi. 16. 



Mursena undulata GiJNTHER, Fische d. Sudsee 3 (1910) 413, pi. 164, 



165; Weber and Beaufort, Fishes Indo-Austr. Arch. 3 (1916) 376, 



fig. 186. 



Depth 8.25 to 19.5 in length over all; head 2 to 2.6 in trunk 



and 6.5 to nearly 8 in total length ; tail varies from slightly more 



to half a head length more than length of head and trunk 



together; eye moderately large, 8.4 to 8.75 in head and 1.5 to 1.75 



in snout, which is usually rather long and narrow, with rounded 



tip and 4 to 5.6 in head ; mouth large, usually closing completely, 



2 to 2.24 in head; origin of dorsal 0.22 to 0.19 the length of head 



before gill opening, which is as large or three-fourths as large as 



eye ; interorbital space varies from diameter of eye to length of 



snout; greatest width of head from 2.25 to 4.25 in its length; 



vertical fins well developed, dorsal less than half the depth of 



body, anal much lower ; maxillary teeth in a single row of about 



