ZooL.— Vol. II.] ROBERTSON— ENTOPROCTA. 341 



branch {hi' .^ and a stolonic process {sto. pro.). This latter 

 structure differs in no way from the true stolon attached to 

 the substratum, except that it arises part way up the stem. 

 It is composed of alternate polypide-bearing and non-poly- 

 pide-bearing segments, and these vary in length just as they 

 do in the original stolon. No hard and fast line, then, can 

 be drawn between a polypide-producing branch and a sto- 

 lonic process; and that portion of the stem which is inter- 

 calated between the two septa at the base of an ordinary 

 branch (fig. 15, in. seg.) may perhaps be homologous with 

 the non-polypide-bearing segment of the stolon (fig. 13, 

 non. pi. seg.) or of a stolonic process (fig. 16, iion. pi. seg.). 



In the jointed character of the stalk and in the branching, 

 G. ramosii bears considerable resemblance to Arthropodaria 

 benedeni Foettinger (1887). In the latter, however, the 

 differentiation of the muscular expansion has not been 

 carried to the extent that appears in Gonypodaria. In the 

 drawing given by Foettinger, the muscle fibers are repre- 

 sented to extend through the length of each segment or 

 phalanx and the budding region appears to be about the 

 middle of the expanded portion of the stem. In the char- 

 acter of their stems these two forms seem to be nearly allied 

 to Urnatella. Davenport (1893) has discussed very fully 

 the relationship between the segmentation of the stalk and 

 the ability to produce buds. His remark upon the " sug- 

 gestive parallelism " which exists "between the formation 

 of segments and the production of buds " finds further con- 

 firmation in G. ramosa, where segmentation is complete and 

 regular and is accompanied by the regular and constant 

 formation of buds. 



3. The Calyx. — This differs in no essential respect 

 from that described for the PedicellinidcC in general. As a 

 rule it is situated just above a muscular expansion. Its 

 lophophore is at right angles to the axis of the stem. Exter- 

 nally it is covered by a continuation of the delicate cuticle 

 of the stalk. The number of the tentacles varies from six- 

 teen to nineteen. The various systems of organs, digestive, 

 nervous, genital and excretory, correspond closely to those 

 so fully described by Ehlers for Ascopoda?'ia niacropus. 



