354 ORDER CHOANO-FLAGELLATA. 



length ; enclosed animalcule elongate-ovate, occupying one-half of the 

 cavity of lorica. Length of lorica 1-2500". HAB. Salt water, solitary. 



A single example only of this species has as yet been met with, being then 

 obtained in company with 6". inquillata and S. curvipes on zoophytes originally 

 brought from Brighton. Excepting for its smaller size, the lorica in its form and 

 proportions corresponds so closely with that of the long-stalked variety of the fresh- 

 water Salpingaca gracilis, as delineated at PI. VI. Fig. 27, that its separate 

 illustration has been omitted. 



Salpingceca tintinnabulum, S. K. PL. V. FIGS. 21 AND 22. 



Lorica bell- or cup-shaped, somewhat variable in its proportions, widest 

 and everted at its anterior margin, the width usually nearly equal to 

 the total length ; pedicle varying from a less length to twice the length of 

 the lorica ; contained animalcule pyriform, tapering posteriorly, attached 

 to the bottom of its lorica by an attenuate prolongation of the body- 

 substance. Length of the lorica 1-3250". 



HAB. Salt water, solitary. 



This animalcule was obtained somewhat abundantly from sea-water derived from 

 the Brighton Aquarium, containing sponges and Ascidians in a semi-decayed state. 

 The variable length of the rigid pedicle forms a conspicuous feature of this species. 

 At PI. V. Fig. 22 the encysted condition of an example of the short-stalked variety 

 is represented. 



Salpingceca ringens, S. K. PL. V. FIGS. 17 AND 18. 



Lorica tapering posteriorly, one and a half times as long as broad, 

 ovate for the two-thirds forming its central and posterior portions, the 

 anterior third expanding outwards abruptly, the greatest width being 

 at the front margin. Pedicle straight, equal in length to the lorica ; 

 enclosed animalcule flask-shaped, attenuate anteriorly. Length of lorica 

 1-2000". HAB. Salt water, solitary. 



The lorica of this species presents a certain resemblance to that of both 

 S. inquillata and 6". urceolata. From the latter of these it may, however, be at once 

 distinguished by the greater breadth and abrupt widening out of its anterior border, 

 and by the non-contractility of the walls of this region ; a similar widening out of 

 the anterior region, together with the shorter and broader proportions of the lorica, 

 generally distinguishing it in a like manner from S. inquillata ; added to this, the 

 enclosed animalcule in the present instance is altogether distinct in shape, being in 

 its normal condition flask-shaped or pyriform, instead of simply ovate. A perfectly 

 quiescent or encysted condition of the animalcule, probably pending the propagation 

 of the species by multiple fission, after the manner already described of Salpingceca 

 fusiformis, was observed, and is represented at PL V. Fig. 18. This variety was 

 found attached to sea-weed imported to the fish-house of the Zoological Gardens 

 from Weymouth in April 1877. 



Salpingoeca inquillata, S. K. PL. VI. FIGS. 1-6. 



Lorica elongate-ovate, tapering posteriorly, widest in the centre, slightly 

 everted at the anterior margin, about twice as long as broad ; contained 

 animalcule simply ovate, occupying about one-half of the cavity of the 



