Occasional Papers of the Museum of Zoology 13 



shorter alimentary canal, which in a specimen >^2 mm. long 

 (without caudal j had the intestines 150 mm. long. In C 

 anomalmn 81.5 mm. long (without caudal j the intestines were 

 360 mm., while in another yz mm. long they were 530. A 

 breeding male from western Pennsylvania 145 mm. long shows 

 the intestines 515 mm. That the length of the intestines is 

 quite variable is unquestionable. In C. anomaliDii it is claimed 

 that the intestines are always dark and break quite easily, while 

 those of C. brevis are white and not so fragile. My examples 

 of C a no main III certainly show^ both conditions, and also many 

 were more or less wrapped in fatty tissue. Also in C. anom- 

 aliim the alimentary canal wraps around the air-bladder many 

 timeS; though my material shows it variable in this respect. 

 Sometimes half the number of folds, or a half dozen or more 

 may encircle the air-bladder. In no case could only one or 

 two coils about the air vessel be detected. Possibly an exam- 

 ination of a large amount of material may disclose such a con- 

 dition. It is also claimed for C. brevis that the other folds 

 are not spiral but longitudinal, and in this both conditions were 

 noticed, though the lengthwise folds variable. Further, my 

 material often showed the anterior folds variable, as several 

 were even noticed encircling the hind portions of the liver, 

 and others showed them loose or inclined. Some dissections 

 revealed the alimentary canal like a continuous even coil, even 

 posteriorly or where the air-bladder did not extend. Often 

 the coils were between a dozen and eighteen to twenty in 

 number. 



An examination of the above typical nominal species de- 

 scribed by Cope shows that they fall within the limits of C. 

 anomalum in the arrangement of their alimentary canals, which 

 have a dozen or more coils and half at least around the air- 



