1851.] 241 



tions ; the first, elongated pyriform; the second cylindroid, a little dilated at its 

 lower end. Intestine sinople, cylindrical, a little narrower than the ceso- 

 phagus. 



Male. 3 lines long, l-200th to l-160th in. broad at middle. Posterior ex- 

 tremity curved, acute, furnished on each side ventrally, with an expansion of the 

 integument, of nearly uniform breadth, ]-S00th in., to its termination, com- 

 mencing l-50th in. above the end of the tail, and perforated by 6 nearly equi- 

 distant respiratory canals. Tail l-300th in. long from anus. Anal and gene- 

 rative apertures indicated by a prominent lip, and separated by a small conical 

 papilla. Penis consisting of two corneous, curved spiculae; one l-56th in. long, 

 the other l-200th in. long. 



Female. Viviparous, 6 lines long, 1-lOOth to l-90th in. broad. Tail straight, 

 long conoidal, 1-lllth long from anus, obtuse, terminated by 3 minute points 

 l-4000th in. long. Generative aperture surrounded by a very prominent lip, a 

 little posterior to the middle. First portion of oesophagus l-66th in. long; 1 -200th 

 in. at broadest part ; second portion, l-56th in. long. 



Habitatio7i. Small intestine of Emys guttata. 



T^NIA, Linn. 



3. TjENIA PtJLCHELLA, n. S. 



White, without any admixture of any other color, variable, usually broadest 

 anteriorly. Head quadrilateral, sub-clavate, obtusely rounded, broader than the 

 neck. Acetabula circular, cup-shaped, lateral and opposite, sessile, protractile. 

 Neck very long, cylindroid. Articuli containing several colorless globules ; an- 

 teriorly subglobular or transversely oval; posteriorly moniliform, longitudinal- 

 ly oval, or cylindroid and centrally incrassate. 



Measjiremeiits. Longest 9 in. Articuli commencing to be distinctly separate 

 4 in. from the head. Breadth anteriorly I line; posteriorly l-6th line. Anterior 

 articuli l-6th line long; posterior \ line. Acetabula, l-166th in. diameter. 



Smallest 2 in. Head, l-75th in. broad. Articuli commencing distinctly sepa- 

 rate J in. from the head. Broadest part of neck, l-90th in. ; short distance pos- 

 terior to the head, l-125th in. Anterior articuli 1-lOOth in. diameter ; posterior 

 l-44th in. long; l-200th broad at extremities, l-133d in. broad at middle. Ace- 

 tabula, l-200th in. diameter. 



Habitation. Small intestine of Bufo americanus. 



Remarks. Closely resembles the Taenia dispar, Goeze, found in the Bufo viri- 

 dis, etc., but it is relatively longer and narrower, and is never colored. 



PLANARIA, Muller, 



4. PlaNARIA SYIVATICA, 71. S. 



Body elongato-fusiform, thick, becoming narrowed forward, smooth, shining ; 

 superiorly convex, grayish with a fuliginous stripe down each side of the dorsal 

 line, and a transverse spot of the same color, at, or just posterior to the centre : 

 inferiorly compressed, whitish ; anteriorly attenuated, proboscidiform ; tip re- 

 curved, fuliginous, obtuse; posteriorly broadest, terminating acutely. Eyes 

 two, black, globular, lateral, slightly prominent. 



Length 2 to 5 lines ; breadth at the anterior fourth, |th of a line ; at posterior 

 fourth, |th of a line. 



