22 



EEPOET OF COMMISSIONER OF FISH AND FISHERIES. 



connecting forms. Premising, then, that in giving to the IlToank speci- 

 mens a subspecific name, my object is simply to define the limits of 

 variation from the normal type in a given direction, I would provis- 

 ionally propose that they be designated as subspecies hrevicauclata. 



The specimens from the Saint John's Kiver, Florida, are extremely 

 variable in every respect. Certain individuals show a tendency to elon- 

 gation of the head and tins, and also a slenderness of the posterior part 

 of the body, and nearly all the individuals from that region are more 

 lightly and gracefully shaped ; they all have a tendency to a yellow 

 coloration, especially upon the caudal lobes. 1 have not felt justified, 

 however, in calling it a subspecies. 



1 have not had an opportunity to study the Maine schools, but am 

 inclined to believe that their difi:erences are very perceptible. 



In plate VI are shown the chief variations of form. Fig. 1 shows the 

 typical form; fig. 2 the subspecies brevicaiidata ; fig. 3 the average form 

 from the Saint John's Kiver, Florida ; fig. 4 the subspecies aurea. 



Table of measuremenis. 



Current number cf specimen. 

 Loealit J' 



Extreme length 



BoUy : 



Greatest height 



Least height of tail 



Length of caudal peduncle 



Head : 



Greatest length 



Distance Irom snout to napo 



Groat est width 



LeuiTlh of snout from perp. from centre of orbit 



Length of opercuLim 



Length of maxillary 



Length of mandible 



• Distance from snout to center of orbit 



Dorsal : 



Distance from snout 



Length of base 



Origin of pectoral to origin of dorsal 



End of dorsal to end of anal 



Length of longest ray 



Length of last ray 



Anal : 



Distance from snout 



Length of base 



Origin of anal to origin of dorsal 



Lengt li of longest ray 



Length of last ray 



Caudal: 



Length of middle rays 



Length of external iays, superior 



inferior 



Pectoral: 



Distance from snout 



Distance of tip Irom snout 



Length 



Length of longest axillary appendage 



Ventral: 



Distance from snout 



Length 



Origin of ventral to end of dorsal 



Dorsal 



Anal. 



Is' umber of scales in lateral lino 



10,405=709 

 U. A. S. 



Wood's Holl. 



Millim. lOOlhs. 



Very Jut. 

 251 



3Si 

 9 



32 



20 

 15 

 10 

 9 

 Ui 



m 



54 

 19 

 41 



I'-'i 

 C" 



73 

 14 



39 



5| 



5i 

 2r!" 



2f):V 



30 



4e'i 

 19" 

 11 



53 



33 



10,405 =orig. 

 2Sro. 247. 



Wood's Holl. 



Millim. lOOths 



Plump. 

 243 



20 

 20 

 107 



31 i 



31 



20A 



14* 



it! 



lOJ 



51 



171 

 3:if 

 £4 

 11 



33 



5i 



4 



20* 

 23" 



32 



43 

 17* 



20,666 a. 

 Wood's Holl. 



Millim 



lOOths. 



341 



31 



20i 



lOJ 



9 

 14 



17 



lOJ 



49 

 17i 

 35i 

 25 



GJ 



72 

 15J 

 36 

 6J 



20 

 23 



30 

 46 



18 



