162 



Comparison of Brevis and Anomalum. 



Campostoma 



brevis. 



Campostoma 

 anomalum. 



Length of body to base of caudal . 



Length of head 



Diameter of eye 



Length of pectoral 



Length of ventral 



Length of anal 



Length of dorsal 



Length of snout 



Rays in dorsal 



Rays in anal 



Scales along lateral line 



Back of eye to origin of anal 



Greatest depth of body 



Diameter of alimentary canal 



Length of alimentary canal 



Folds on or about alimentary canal 



b2 mm. 

 19 mm. 



4.5 mm. 

 14.5 mm. 

 11.5 mm . 

 13 mm. 

 15.5 mm. 



7 mm. 



8. 



7. 



56 scales and 52 

 pores. The 93 

 mm. specimen 

 and all others 

 have 53 scales. 



47 mm. 



18 mm. 



1.5 to 2 mm. 



150 mm. 



81.6 mm. 



19 mm. 



4.5 mm. 



16 mm. 



12 mm. 



13 mm. 

 15.5 mm. 



7 mm. 



53 scales and 51 

 pores. 



47 mm . 



20 mm. 



1 mm . 



360 mm.* 



About 11 longi- About 20 circu- 

 tudinal folds. lar folds. 



"In a 72 mm. specimen I got the entire intestines in a continuous string, which was 

 530 mm. long. 



The chief differences Ix'tween tlii.s .species ami anoniahun are the 

 length, character and arran.uemcnt of the alimentary canal. It may be 

 named brevis in allusion to its coiuparatively short alimentary tract. 

 The intestines of anomalum are always dark and l)rcak quite easily, while 

 those of the new species are white and not so fragile. The intestines of 

 anomalum contain principally mud, while those of the new species contain 

 practically no mud; they are also more solid and wrapped up in fatty 

 tissue.- The alimentary canal of anomalum wraps around the air bladder 

 manv times, while the alimentary canal of brevis does not go around the 



