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. 



56 scales and 52 

 pores. The 93 

 mm. specimen 

 and all otbers 

 bave 53 scales. 



47 mm. 



18 mm. 



1.5 to 2 mm. 



150 mm. 



About 1 1 longi- 

 tudinal folds. 



81.5 mm. 



19 mm. 



4.5 mm. 



16 mm. 



12 mm. 



13 mm. 

 15.5 mm. 



7 mm. 



8. 



7. 



53 scales and 51 

 pores. 



47 mm. 



20 mm. 



1 mm. 



360 mm.* 



About 20 circu- 

 lar folds. 



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

 530 mm. long. 



The chief differences between this species and anomalum are the 

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

 named brevis in allusion to its comparatively short alimentary tract. 

 The intestines of anomalum are always dark and break 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 

 many times, while the alimentary (anal of brevis does not go around the 



