GENUS SCYPHIDIA. 659 



According to the figures given by Claparede and Lachmann, the annulate and 

 flexible body presents an almost worm-like contour, and is capable of assuming a 

 variety of gracefully curved positions. Excellent illustrations of this type, as repro- 

 duced at PL XXXI. , are given by Quennerstedt.* 



Scyphidia rugosa, Duj. PL. XXXIII. FIG. 33. 



Body pyriform, the attached posterior extremity most attenuate, surface 

 of the integument obliquely and coarsely furrowed, pharyngeal cleft deeply 

 prolonged. Length when extended 1-280". 



HAB. Pond water, among vegetable debris. 



This form, in addition to the Vorticella ringens, inclinans, and pyriformis of 

 Miiller, included in this genus by Dujardin and Perty, as also the Scyphidia patula 

 of the latter writer, are regarded by Claparede and Lachmann as representing 

 merely recently attached and imperfectly observed Vorticellce. Scyphidia rugosa, 

 however, seems to possess claims for recognition as a good species, and is therefore 

 retained. 



Scyphidia Fromentellii, S. K. PL. XXXIII. FIG. 53. 



Body elongate-clavate, anteriorly truncate, the posterior extremity con- 

 tracted, stalk-like, longitudinally plicate ; the remainder of the body smooth ; 

 possessing apparently two or more contractile vesicles. Length of extended 

 bodies 1-300". HAB. Fresh water. 



This form is referred with some doubt to Scyphidia rugosa Duj., by De Fromentel,t 

 from which, however, it is found to differ in every essential detail. De Fromentel 

 describes it as having a very short, stout, separate footstalk, but according to his 

 drawings there is no such distinct organ, the attenuate, stalk-like posterior extremity 

 being soft and fleshy, and becoming entirely obliterated or amalgamated with the 

 general substance of the body when the animalcule is contracted. His delineations 

 of this species also indicate this form as possessing several contractile vesicles; 

 one zooid delineated has two such structures situated anteriorly, and another 

 specimen one vesicle anteriorly and the other posteriorly placed. A third example 

 is represented as possessing no less than three contractile spaces, a circumstance 

 so anomalous in the Peritrichous order that the student is bound to infer that a 

 misinterpretation of these organs has been made. 



Very recently, May 1880, the present author has received, through Mr. Thomas 

 Bolton, specimens of the Entomostracon Daphnia pulex extensively infested with a 

 minute sessile Vorticellidan agreeing in all respects, except for the presence of a 

 single and normally located contractile vesicle, with the species now under discussion 

 as figured and described by De Fromentel. It was noted in several instances that 

 the parenchyma was more or less conspicuously vacuolate, the separate vacuoles 

 presenting much the same size and contour, but not exhibiting the pulsatory motions 

 of the single anteriorly located contractile vesicle. 



Scyphidia inclinans, D'Udk. sp. PL. XXXIV. FIG. 2. 



Body elongate-gibbous, highly contractile, rather over twice as long as 

 broad, dilated centrally, tapering posteriorly and terminating in a small 

 adherent disc ; peristome-border even, thickened, ciliary disc elevated 

 obliquely above the peristome ; vestibular cleft produced backwards to the 

 centre of the body ; parenchyma transparent, granular ; cuticular surface 

 smooth ; contractile vesicle spherical, situated close to the vestibulum, 

 * ' Sveriges Infusoriefauna,' 1869. t ' Etudes sur les Microzoaires,' 1876. 



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