372 Illinois State Laboratory of Natural History. 



dorsum." The two carina? of the specimens taken at Havana 

 extend a trifle more than two thirds the length of the dorsum. 

 The carina are high, thick at base, and very conspicuous. 

 The length of the specimens averages greater than that given 

 by Mr. Gosse. I found them as long as .58 mm., includ- 

 ing the toe, which is nearly half the entire length. The 

 toe is slightly curved and ends in a spine, with two smaller 

 accessory spines. 



50. M. lata Jennings ('94). 



This species was met with in June and several times during 

 October, in surface towings, and also in towings taken below 

 the surface, from Quiver Lake. It is easily recognized by 

 the indentation on the right side of the body next to the foot 

 joint, and by the flattened truncate column of the corona. 



CCELOPTJS GOSSE. 



Body cylindrical, curved ; foot bulbous, inclosed ; toes, 

 one broad plate with another laid upon it in a different plane. 



51. C. porcellus Gosse. 



This curious and interesting form was found in towings 

 and among vegetation from Quiver Lake from June to 

 August, and in surface towings from the river in June. 



52. C. tenuior Gosse. 



This form was taken in Quiver Lake in the same months 

 as the preceding, and was generally found in company with 

 it, although in smaller numbers. 



Family DINOCHARID^J. 



DlNOCHARIS EhEBG. 



Lorica vase-shaped, faceted, with projecting plates, or 

 armed dorsally with spines ; head retractile within a chiti- 

 nous cap ; eye single ; foot and toes very long, the former 

 bearing spines. 



53. D. pocillum Ehrbg. 



The records of this species for both years show a seasonal 

 distribution quite the reverse of that characterizing its rela- 

 tives, which are generally commonest in the warmer months, 



