348 ORDER CHOANO-FLAGELLATA. 



In the shape of the lorica this species most nearly resembles the pediculate 

 marine variety 5. urceolata, delineated in the same plate. The only example yet 

 found was attached to the carapace of the Entomostracon Diaptomus castor obtained 

 from a pond on Wandsworth Common in April 1877. 



Salpingoeca cylindrica, S. K. PL. VI. FIG. 37. 



Lorica sessile, subcylindrical, slightly widest posteriorly, about one and 

 a half times as long as broad ; contained animalcule elongate-ovate, attached 

 by its posterior extremity to the bottom of the lorica, its distal end level 

 with the orifice of this structure. Length of lorica 1-3250". 



HAB. Fresh water, solitary. 



The simple subcylindrical lorica of this species agrees most nearly with that 

 of the marine form Salpingoeca petiolatum, and may be said at the same time to 

 correspond closely in miniature with that of many of the sessile Peritrichous 

 Vaginicolce. The only example yet observed was found upon Conferva taken 

 from a pond near Acton. 



Salpingoeca Carter!, S. K. PL. VI. FIG. 39. 



Lorica flask-shaped, the neck very attenuate, exceeding in length the 

 bulbose posterior portion. Total length 1-3000". 

 HAB. Fresh water : Bombay (H. J. C). 



The above specific name is here introduced for the reception of the form 

 originally figured and described by Mr. H. J. Carter* under the title merely of a 

 " Bell-shaped Infusorium." As more recently recognized by him, the affinity of 

 this variety with the Salpingoeca amphoridium of James-Clark is very close, but the 

 greater proportional length of the lorica, as shown by comparison of the figures 

 of the two forms in question, indicates the necessity of conferring upon it a new 

 specific title. The illustration by Mr. Carter, here reproduced, seems to indicate 

 that the body of the lorica is joined to the object upon which it grows, through 

 the medium of a narrowed prolongation of its substance, presenting the aspect of 

 a peculiarly modified and expanded footstalk. The type-example of this species 

 was found on Conferva in the fresh-water tanks of Bombay. 



Salpingoeca (?) Wallichi, S. K. PL. V. FIGS. 23 AND 24. 



Lorica irregularly pyriform or flask-shaped, inflated posteriorly, terminat- 

 ing anteriorly in a narrow neck, growing upon or immersed within the shell- 

 substance of Globigerince and other Foraminifera. HAB. Salt water. 



This type was originally described by Dr. Wallichf under the title of "externally 

 opening pyriform cavities within the shell-substance of Globigerince" It is here intro- 

 duced as a probable representative of the genus Salpingoeca, with some amount of 

 diffidence, the living constructor of the pyriform loricae or cavities not having so far 

 been observed, and the bodies in question having been hitherto regarded by their 

 discoverer, and also by Dr. Carpenter, J as essential structural elements of the 

 exogenously developed shell-substance of the organisms with which they are found 

 associated. As such hypothetical structural elements, they are interpreted on the 

 one hand by Dr. Carpenter as being produced through the invasion from without 



* 'Ann. Nat. Hist.,' vol. viii. p. 9, pi. ii. fig. 42, 1871. 



t ' The North Atlantic Seabed,' 1862, and 'Deep Sea Researches on the Biology of Globi- 

 gerina,' 1876. 



\ "On the Nature of the Seabottom procured by H.M.S. Challenger" ' Proc. Roy. Soc ' 

 1875- 



