GENUS CODOSIGA. 339 



furnishing this description were obtained by the author from a pond in the North 

 London district supplied from the New River Waterworks. 



Codosiga candelabrum, S. K. PL. III. FIGS. 8 AND 9. 



Zooids elongate, gibbously ovate, from two and a half to three times as 

 long as broad, forming small erect clusters and attached by secondary foot- 

 stalks of their own altitude to the extremity of a pedicle of almost twice 

 that height. Length of bodies 1-2000". 



HAB. Fresh water, on Entomostraca. 



This type was obtained in March 1876, from the fresh-water dykes in the 

 neighbourhood of Great Yarmouth, Norfolk, all the specimens then examined being 

 found attached to the ovisacs and limb-joints of a species of Cyclops. In form and 

 size the individual zooids correspond closely with those of Codosiga umbellata, the 

 shortness of the primary pedicle, the length of the secondary ones, and the erect 

 position maintained by the animalcules with relation to their supporting stem, dis- 

 tinguish it at once, however, from either the adults or from a young colony of that 

 species, for which it might possibly at first sight be mistaken. Except for the small 

 number of animalcules included in one colony-stock, four being the greatest number 

 that has been yet observed, this species in miniature recalls to mind the higher 

 Infusoria Epistylis digitalis, or E. anastatica, found growing with it on the same 

 Entomostracon. 



Codosiga pyriformis, S. K. PL. II. FIG. 14. 



Zooids subpyriform, attached in small clusters by distinct rigid foot- 

 stalks, which equal their own bodies in length, to the apex of a long, simple, 

 and slightly sinuous primary pedicle. Length of bodies 1-4000". 



HAB. Salt water. 



This type closely approaches the cosmopolitan fresh-water species C. botrytis, 

 previously described. In addition, however, to its salt-water habitat and the broader 

 contour of the animalcules, it may be readily distinguished from that species by the 

 more attenuate and less rigid growth of the primary pedicle, by the greater length of 

 the secondary ones, and the in general more erect position assumed by the indi- 

 vidual zooids ; this latter feature is a necessary accompaniment of the comparatively 

 rigid consistence of the short secondary pedicles which immediately support the 

 animalcules. It would seem to be not altogether improbable that the so-called 

 variety of Codosiga botrytis recently figured and described by C. Robin, characterized 

 by similarly developed secondary footstalks, represents the type now under considera- 

 tion. This supposition receives substantial support from the circumstance that, 

 although no habitat is recorded, the majority of accompanying infusorial types 

 described by him are essentially inhabitants of salt water. 



The examples of Codosiga pyriformis examined by the author were obtained 

 growing abundantly on the deserted polyparies of Hydroid zoophytes and Polyzoa 

 received from Brighton. 



Codosiga furcata, S. K. PL. II. FIGS. 15-19. 



Zooids shortly and obtusely ovate, attached singly or in pairs by foot- 

 stalks of about their own length to a short and irregular, furcately branching 

 pedicle. Length of bodies 1-3300", height of primary pedicle rarely ex- 

 ceeding that of a single zooid. HAB. Fresh water. 



This species may be readily distinguished from all the preceding forms by the 

 character of the pedicle which commences branching at a short distance only from 



Z 2 



