36 RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 



boscis first became visible ; as these advanced the second circle of 

 tentaculae appeared, and when the proboscis was entirely protruded 

 the outer tentajulac were deeply reflected upon the outside of the 

 body, and the inner circle projected obliquely outward and upward. 

 The proboscis was clavate in form or cylindrical and moderately 

 dilated at its free end, and more so at its base. The following six 

 days no perceptible change was observable in the development of 

 the animal, and after this the egg showed evident appearances of 

 decay, and I gave them no further attention. 



[No. 58. See Bibliography.] 



TWO NEW SPECIES OF INFUSORIAL ENTOZOA. 



1. Nyctothcrus Oralis. — Body translucent oval, posteriorly obtuse. 

 Anterior granular areola three sided. Po.sterior fissure passing 

 downward. 



Length i-ioothinch; breadth i-33d inch (error).* 

 Habitation. — The intestinum tenue of the Blatta orienfalis, occa- 

 sionally in considerable numbers. 



2. Bodo Jididis. — Body translucent, faintly greenish, faintly' gran- 

 ular, with one or two large round vacuolae and numerous minute 

 ones; form changing, usually globular, oval, or pyriform. Caudae 

 twice the length of the body; ver}^ active, frequently twisted into a 

 ring at the extremit5^ Diameter of body i -3000th inch. 



Habitation. ~~^\\^ large intestine oi Jn/us niaroinatus, in company 

 with Nyctot/wrus velo.v, often in millions. 



[No. 59. See Bibliography.] 

 DESCRIPTION OF SOME NEMATOID ENTOZOA INFESTING INSECTS. 



Genus Aon/nis. vSub-genus Strcptostovia. Proc. Acad. Nat. Sci., 

 1849, p. 230. 



I. Streptostoma gracile. 



Oxyuris Diesingii. Hammerschmidt. Isis von Oken J. 183S, S. 

 354, Taf. iv. Fig. 6. 



Body attenuated from the middle anteriorly' and posteriorly, 

 white, translucent, shining. Anterior annuli ver}^ broad and mov- 

 able upon one another. Oral annulus short, truncate ; second 



* Lenj^th i-i87th inch; breadth i-25oth inch. See "Some Observations on 

 Nemaioidea imperfecta,'''' Trans. Amer. Philosoph. Soc, 1853, p. 244 (with 

 drawing). 



