RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 45 



vibrillse measure about i -3500th inch long. Each segment of the 

 animal's body at its posterior part contains a globular transparent 

 nucleus measuring 1-2333(1 inch in diameter, with a globular, re- 

 fractile nucleolus i -7000th inch in diameter. This latter body, with 

 the form of the apparent segments, makes the animal resemble a row 

 of gregaringe attached together. 



[February, 1851. No. 70. See Bibliography.] 



DESCRIPTION OF A NEW SPECIES OF ENTOZOA. 



1. CiiciiliDius Roseiis. — Body rose-red with whitish tips, translu- 

 cent, cylindrical, robust, narrowed at the extremities ; anteriorly 

 obtuse ; posteriorly acute. Mouth elongated, surrounded by a 

 papillated lip, and enclosing a complex, corneous, yellow-colored 

 apparatus. CEsophagus consisting of two portions — the first long, 

 cylindrical ; the second short, narrow, pyriform. Ventriculus 

 broad, cjdindrical. Anus very near the posterior end. Tail i-5th 

 of a line long. 



Female. — Length i inch to 1^2 inches; breadth 3-5ths of a line. 

 Generative aperture 4 lines from end of the tail. Ovaries two, 

 white, very tortuous. 



Male. — Length 6 to 10 lines ; breadth yi line. Penis composed 

 of two, white curved, spiculae, 4-5ths a line long, protruding close 

 to the anal aperture. 



Habitation. — I found 580 adult specimens and many thousand 



young of this species in the intestine of a Tortoi.se ( Testiido ?) 



from Java. About one-fourth of the number were males. 



2. Asearis Felis disco/oris. — Body yellowi.sh white, subcyliudrical, 

 with prominent longitudinal lines ; posteriorly acute ; anteriorly 

 moderately narrowed with the extremity furni.shed with a narrow 

 lateral alaform expansion undulated at the free edge. Mouth dis- 

 tinctly trilobed. Tail short ; anus just anterior to the point of the 

 latter. 



Length i inch to i ^ j inches ; greatest breadth at the posterior 

 third ^2 a line ; posterior to alaform expansion % of a line ; length 

 of latter i line; greatest breadth at base i-ioth of a line. Annu- 

 lations i -570th inch wide. 



Habitation. — Six females obtained from small intestine of Felis 

 discolor. 



3. Spiroptera Didelphidis virginianff. — Body whitish, cylindrical ; 

 anteriorly narrowed, sub-acute ; po.steriorly curved, acute, furnished 



