. Bonner zoologische Monographien. Zoology. 35 of head, flanks and ventral part of trunk somewhat orange; tips of pectoral, dorsal, anal and caudal fins darker. Description: Diplomystes of about 260 mm in total length as adult; maximum length known about 300 mm. (The type specimen [CAS 55423] is actually 261 mm in total length and 222 mm in standard length. Eigenmann [1927] gives 255 mm in stan- dard length for the specimen. I attribute the difference to shrinkage while in preserva- tion for about sixty-five years [1919 — 1984]; in Hfe the fish probably reached about 300 mm in total length, as
. Bonner zoologische Monographien. Zoology. 35 of head, flanks and ventral part of trunk somewhat orange; tips of pectoral, dorsal, anal and caudal fins darker. Description: Diplomystes of about 260 mm in total length as adult; maximum length known about 300 mm. (The type specimen [CAS 55423] is actually 261 mm in total length and 222 mm in standard length. Eigenmann [1927] gives 255 mm in stan- dard length for the specimen. I attribute the difference to shrinkage while in preserva- tion for about sixty-five years [1919 — 1984]; in Hfe the fish probably reached about 300 mm in total length, as reported to me by older residents of the area between Con- cepcion to Cautin, Chile. They state without exception that diplomystids over 300 mm in total length were commonly found in deep zones of rivers and lakes.) Body propor- tions variable, more or less overlapping those of other Diplomystes (Table 1). Eye diameter 40 to 65 % (x = 52 %) of preorbital length. Low adipose fin, its depth is 16 to 25 % (X = o/o) of its length. Snout shghtly rounded (Fig. IIB, C). Number of vertebrae and fin-rays in Table 2. The following description of the coloration is based on MCZ 61245 (in alcohol), two specimens recently collected. Dorsum of head and trunk is dark violet or blackish. Ven- tral part of head, flanks and ventral part of trunk is orangish in one specimen; in the other flanks are shghtly violet to blackish; tips of pectoral, dorsal, anal and caudal fins are darker (Table 3).. \4. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bonn, Zoologisches Forschungsinstitut und Museum Alexander Koenig
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