34 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 



type iu a given direction, I would provisionally propose that they be 

 designated as variety brevicaudata. 



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

 variable in every respect. Certain individuals show a tendency to 

 elongation 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 variety. 



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

 inclined to believe that their diflerences are very perceptible. 



Table of Measurements. 



CniTcnt uumber of specimen. 

 Locality 



10,405 = 709 

 C. A. S. 



Wood's HoU, 



10,405 = Grig. 

 No. 247. 



"Wood's Holl, 

 Mass. 



20,666 a. 



Wood's Holl, 

 Mass. 



Millim. lOOths. Millim. lOOths, 



Extreme lengtli i.. 



Bo.i.v: 



Gieatesi height 



Leant height of tail 



Leiigih ot caudal peduucle 



Head : 



Gieatest leiig'li ... 



Disiauce f roiu .suoiit to nape 



Gr aiest width 



Length of .snont from perp. from centre of orbit. 



Leujilh of opeioiilum 



Length of iiiaxi lary 



Length of mandible 



Uisiaiice from snont to centre of orbit 



D(ir«al : 



Uistanco from snout 



Length of base 



Oi igin of pti-toral to origin of dorsal 



End of dorsal to end of anal 



Length of lout;e t ray 



Len^^th of last ray 



Anal : 



Distance from snout 



Length of Oase 



Orig n of anal to origin of dorsal 



Length of longest ray 



Leugih of last ray ." 



Caudal : 



Length of middle rays 



Li'Dgth of external rays, snpf>rior 



interior 



Pector 1 : 



Distance from snont 



Distance of tip from snout 



Lmgth 



Li iigth uf longest axillary appendage 



Ventral: 



Distance from snout 



Leneth 



Origin of ventral to end of dorsal 



Dorsal inys ,. 



Aual rays' ... 



Tery fat. 

 251 



9 



9i 



32 

 20 

 15 

 10 

 9 

 Uh 



m 

 m 



54 

 19 

 41 

 25i 

 12.i 

 6 



73 

 14 

 39 



6i 

 5i 



5J 

 23 



19 



11 



53 

 38 



Millim. lOOths. 



Plump. 

 243 



■sn 



31 



20* 



10 



9 



14J 



lOi 



51 

 17* 

 3;!f 

 24 

 11 

 7 



33 

 5h 



4J 

 20J 

 23 



32 



48 

 17* 



53 



^ 



31 



130 



31 



20* 



10^ 

 9 

 14 

 17 

 lOi 



49 

 17^ 

 35* 

 25' 

 12* 

 6| 



72 



15i 



36 

 61 

 H 



H 



20 

 23 



30 

 46 



18 



