GENUS SALPINGCECA. 7,47 



accords so closely with that of S. fusi/ormis, previously described, that but for its 

 marked gregarious habits of growth it would be difficult to distinguish it from that 

 species. By Stein, it is represented as forming more or less considerable stellate 

 or rosette-shaped clusters upon the branching pedicle or zoodendrium of the 

 Peritrichous type Epistylis anastatica ; it has recently been met with by the author 

 forming similar clusters on the retractile pedicles of Vorticclla ncbulifera, collected in 

 the neighbourhood of Acton. The author has much pleasure in associating with 

 this species the name of its eminent discoverer. 



Salpingoeca minuta, S. K. Pl. III. Figs. 10-12. 



Lorica sessile, ovate or conical, rounded and widest basally, taperino- 

 evenly towards the apical extremity, but not prolonged in a neck-like 

 manner ; the anterior aperture not everted. Length of lorica 1-4000". 



Hab. — Fresh water, attached to the loricse of other flagellate animal- 

 cules ; solitary or sparsely scattered. 



This diminutive type has up to the present time been met with attached only 

 to the conjoint loricse or polythecium of the minute Flagellate form Binobryon 

 sertularia, hereafter described, and under which conditions it has been obtained 

 in tolerable abundance. On account of its extremely small size, the body within 

 the lorica frequently not exceeding in length the 6000th part of an English inch 

 a more than ordinarily high power is required for its satisfactory examination. 

 An interesting process of gemmation similar to that recorded of two former species 

 has been observed also in this pigmy representative of the genus. At Fio-. 12 of 

 PI. III. an example is afforded of a zooid with the sarcode flowing out of the aperture 

 of the lorica, the flagellum being as yet unretracted, while at Fig. 10, which repre- 

 sents two animalcules growing upon an empty cell of Di;iob?yon sertularia, a small 

 rounded body attached below and indicated by the letter a, is evidently the result 

 of the budding-ofif of one of these zooids, requiring but a brief interval for its 

 development into the characteristic parent form. 



Salpingoeca pyxidium, S. K. Pl. III. Fig. 16. 



Lorica sessile, obovate, attached by the more pointed posterior ex- 

 tremity, the larger and distal end slightly involute round the edge of the 

 minute terminal aperture; contained animalcule subglobose, fillino- the 

 anterior half of the cavity of the lorica. Length of lorica 1-4000". 



Hab. — 'Fresh water, solitary. 



The dimensions of the lorica of this species correspond closely with those of 

 S. minutus, in shape it is likewise conical, but the proportions are exactly reversed 

 the free end being considerably the larger. The aperture also does not occupy the 

 whole of the anterior border as in all the species hitherto described, but only a 

 small central portion, while the margin surrounding it is involute, thus impartino- to 

 the lorica, as seen in optical longitudinal section, a somewhat heart-shaped contour. 

 A single example only of this species has been so far met with. 



Salpingoeca amphora, S. K. Pl. V. Fig. 13. 



Lorica vase-shaped, attenuate posteriorly, having a neck-like con- 

 striction near the anterior margin, the greatest width being immediately 

 beneath this region ; no pedicle. Length of lorica 1-2000". 



Hab. — Fresh water, solitary. 



