46 



WILLIAM F. ALLEN 



EXPI. AXA'I'IOX OF FIGT'RES 



1 iiiul 1 lU wcic drawn to a scale from injected dissect ions of Scorpa^nichthj'^s 

 murmoratus tails. Fig. 11 is a microscopic view of a portion of the tail of a 30 mm. 

 living Phanerodon atripcs (Viviparous perch) embyro, and figs 3 and 12 are from 

 transverse sections taken through the caudal peduncle of a 28 mm. adult. C'lino- 

 cottus analis. In general the subcutaneous or lymphatic canals are drawn in 

 bhiik, the veins are cross-barred, and the arteries are stippled or draAvn in out- 

 line. A vessel represented in dotted outline signifies that it passes within or on 

 the opjiosite side of a muscle, bone, or other vessel. All microscopical outlines 

 were made with the aid of a camera lucida and the details were filled in afterward. 



LIST OF ABBREVIATIONS USED IN THE FIGURES 



A. or p. prefixed to an abbreviation signifiies anterior or posterior; R. or L. 

 right or left; the vertebrae are numbered from caudad to cephalad, and the caudal 

 fm ravs are numbered from the centre of the fin, dorsad or ventrad. 



C. F. A". 



C. F. A. (1) 

 C. F. A'. (1) 



C. F. A". (1) 



C. In. M. 



Anal tin extrinsic mus- 

 cle. 



Anal ray. 



Anal i-ay arterj-. 



Anal ray lJ^nphatic 

 trunk. 



Anai ray vein. 



Caudal artery. 



Minor caudal arterJ^ 



Branch of minor caudal 

 artery in the ha:'- 

 mal canal. 



Caudal fin artery. 



Dorsal caudal fin art- 

 ery. 



Ventral caudal fin art- 

 ery. 



Minor caudal fin artery. 



Dorsal minor caudal 

 fin artery. 



Ventral minor caudal 

 fin arter3^ 



Caudal fin nerve. 



Caudal fin vein. 



Dorsal caudal fin vein. 



Ventral caudal fin vein. 



Caudal fin intrinsic 

 muscle. 



C.R. 

 C. R. A. 

 C.R. A. (1) 



C.R. T. 



C.R. V. 

 C. S. 

 C. T. 



C. T. 



C. T. (1) 



C. T. (2j 



C. V. 

 Der. 



D. Ex. M. 



D. L. A. 

 D. L. V. 

 D.M. A. R. 



D. M. D. R. 



Caudal ray. 



Caudal ray artery. 



Minor caudal ray art- 

 ery. 



Caudal ray Ij'inphatic 

 trunk. 



Caudal ray vein. 



Posterior caudal sinus. 



Caudal lymphatic 

 trunk. 



Caudal lymphatic 



trunk. 



Dorsal or superior cau- 

 dal fin lymphatic 

 trunk. 



Ventral or inferior cau- 

 dal fin lymphatic 

 trunk. 



Caudal vein. 



Dermis. 



Dorsal fin I'xtrinsic 

 muscle. 



Dorsal lateral artery. 



Dorsal lateral vein. 



Depressor muscle of 

 an anal ray. 



Dei)ressor muscle of a 

 dorsal rav. 



