NO. 214d.. JAPANESE MACROUROID FISHES— GILBERT AND HUBBS. 147 



Ateleobrachinae, new subfamily. 



Germs Ateleohrachium Gilbert and Burke {pterotum)} 

 A. pterottim Gilbert and Burke.t 



LIST OF DOUBTFUL FORMS. 



1. Genus uncertain. 



Macrourus serratus Lowe. 



Macrurus macrolepidotus Kaup. 



"Optonurus" denticulatus (Richardson). 



Macrurus labiatus Koehler. 



Macrurus caudani Koehler. 



Macrurus zanioplwrus Vaillaut. 



Macrurus violaceus Vaillaut. 



Macrurus microps Vaillaut. 



Most of these species are probably referable to Lionurus. 



2. Larval forms. 



The larval forms of certain INIediterranean Macrouroid fishes have been 

 described by Italian ichthyologists under the name Krohnins.' These 

 larval forms have been referred to other genera, but the identifica- 

 tion must be regarded at present as very doubtful. Thus the type- 

 species of KroJmius, K. fllamentosus, has been placed in the synonomy 

 of Coelorhynchus coelorhynchus. 



3. Fossil forms. 



Fossil otoliths ^ have been named as species of Macrurus and Hymeno- 

 ceplialus, but the references must be regarded as extremely doubtful. 



METHODS OF MEASUREMENTS AND COUNTS. 



In the following descriptions the proportions in each species are 

 given as obtained by measurement on the specimen! ; for example, the 

 orbit is measured over the lateral curve of the head. In the tables the 

 measurements are expressed in hundredths of the length from the 

 tip of the snout to the center of the anus. The tail is so frequently 

 injured, with or without the regenerated pseudocaudal, that the total 

 length can not be used satisfactorily. These measurements were 

 made with dividers and a proportional scale, and are valuable in 

 discriminating between closely allied species. 



The measurements were made and recorded as follows: The total 

 length in millimeters (the fact mentioned in a footnote when 

 a pseudocaudal is developed, and followed by a + mark when the 

 tail is broken) ; length of head from tip of snout to end of membrane 

 behind upper angle of opercle; greatest length of orbit, whether 

 the longest diameter is horizontal or oblique ; the least width of the 

 interorbital ; the least width of the entire bony suborbital region ; the 

 distance between the posterior margin of the orbit and the angle of the 



1 Possibly a larval form (see Murray and Iljort, Depths of the Ocean, 1912, p. 745, 

 flg. 537). 



- Cocco, Lettera al Sig. Augusto Krohn, Pesci del Mare de Messina, vol. 1, 18S-1. 



Emery, Note ittiologiche : Atti della Soc. ital. di Sci. nat. Milano, 1878 ; Contribuzioni 

 air Ittiologia, II, Mitlheil. a. d. Zool. Stat, zu Neapel, 1S79, vol. 4, p. 588 ; Contrib., vol. 9, 

 Mittheil. 3, 1883, p. 417 to 418. 



3 Schubert, Jahrb. geol. Reichs., vol. 55, p. 615. 



Kokeu, Z. geol. Ges., vol. 43, p. 77 (and other papers). 



