NO. 3 TELEOSTEAN FISHES — GOSLINE 39 



A final grouping of orders may be suggested on the basis of a 

 number of minor features : the presence of a protrusile jaw and of a 

 single pelvic spine developed from a soft ray, general similarity of 

 caudal skeleton, and others. This group includes the berycoids, 

 zeoids, and percoids. 



The general relationships hypothesized in the above paragraphs 

 are summarized in diagram 4 (which, incidentally, incorporates the 

 string-of -beads concept objected to earlier in the paper). A number 



Perclformes 

 Hotaoaathiformea Zeiformes 



Anguilllformes Boloniforiaes Beryoiforraes^ 

 Ealosaurlformec 



Uormyriformea 



\ 



Clupsiforiaes Clupeiformes' 

 (Division OsteoGlossi) {Dlvisioa Clupei) 



Diagram 4. 



of minor and several major groups have been left out of this diagram 

 (which is after all only a sort of temporary clothes rack to work with 

 and from). The most important of these are the anacanthine, syng- 

 nathiform, gasterosteifonn, cyprinodontiform, and lampridiform 

 groups. Where any of these came off from what appears to be the 

 main isospondylous-iniomous-berycoid-percoid route of teleostean 

 evolution, the present author is not prepared to say. 



REFERENCES 

 Allis, E. p. 



1903. The lateral sensory system in the Muraenidae. Intern. Monats. Anat. 

 Physiol., vol. 20, pp. 125-170, pis. 6-8. 

 Barrington, E. J. W. 



1937' The structure and development of the tail in the plaice (Pleuronectcs 

 platessa) and the cod (Gadus morrhua). Quart. Journ. Micr. Sci., 

 London, n. s., vol. 79, pp. 447-469, 25 figs. 

 Beeg, L. S. 



1940. Qassification of fishes, both recent and fossil. Trav. Inst. Zool. Acad. 

 Sci. U.R.S.S., Leningrad, vol. 5, pp. 87-517, 190 figs. 

 Chapman, W. M. 



1942. The osteology and relationships of the Argentinidae, a family of 



oceanic fishes. Journ. Washington Acad. Sci., vol. 34, pp. 104-117. 



1948. The osteology and relationships of the Microstomidae, a family of 



oceanic fishes. Proc. California Acad. Sci., ser. 4, vol. 26, pp. 1-22, 



12 figs. 



