move into an upright position every time the seta is moved to the back of the branch. From 

 the relative positions of the Loxosoma and the seta, it might be supposed that the Entoproct 

 would sometimes be crushed between the seta and the frontal surface of the branch, when the 

 seta is brought round to the front. But I find no evidence that this actually happens, since 

 the seta always lies on the branch, when in the position referred to, with the Loxosoma 

 outside it. It may be supposed that the Loxosoma reacts very quickly to the stimulus of the 

 movement of the seta, or that it habitually holds itself in an erect attitude, so that it avoids 

 the danger of being injured to which it might otherwise be exposed. 



In some parts of the Cauda, every zooecium has a single Loxosoma, in the position 

 above described. I have not found more than one Loxosoma on any zooecium. 



The number of the tentacles seems to be usually 8, as in L. nitschei and Loxocalyx 

 cocJilear; but I think I am right in saying that it may sometimes rise to 10. I am unable to 

 decide whether a food-gland is present in the bud or not; and I have no reliable observations 

 about the gonads. 



The present species is quite distinct from any other with which I am acquainted. In its 

 loricate condition it approaches L. cocciforme, described below ; but the lorica is less developed 

 than in that species, and does not extend far enough to cover the stalk completely v ). 



It may be remarked that the dried and shrivelled remains of the Loxosoma are some- 

 times quite recognisable in dry preparations of the Canda. 



12. Loxosoma cocciforme n. sp. PI. I, figs 26 — 28). 



112. L. On 112. D., Siphonicytara (Cheilostomata). Stat. 156. o°2o/.2S., i30°s'.3E., coarse sand 

 and broken shells. (Mounted on thê slides 112.D.). 



Form of the calyx resembling that of a Scale-Insect, nearly circular in outline, but 

 becoming narrower at the proximal end, attached by a concave or flattened surface to the 

 outside of its "host", its opposite surface convex. Length of calyx about 220 — 270 *j., breadth 

 190 — 220 'x. Margin very thin all round. The calyx is covered, on its free surface, by a 

 thick cuticle. Stomach small, without distinct lateral lobes. Tentacles usually 10, but in the 

 larger individuals 12. Lophophore transversely elongated, the opening of the vestibule trans- 

 versely oval during retraction and situated on the attached or concave side of the animal. 

 Buds not numerous. Sexes apparently separate. Stalk extremely short, not nearly so long as 

 the calyx, by which it is completely concealed in the retracted state, in which condition the 

 long axis of the stalk is more or less at right angles to the attached surface. The stalk 

 terminates in a disc of attachment, without foot-gland. 



This peculiar species has the form which is sufficiently indicated by the specific name 

 which I propose for it. It was found closely adherent to the surface of the Cheilostome on 

 which it was growing, in most cases just on the distal side of a peristome. The majority of 



1) A chitinous aboral shield on the calyx has been described by Annandale (1908, Fauna ISrackish Fonds Port Canning", 

 Pt VII, Ree. Ind. Mus., II, Pt I, p. 14) in the species described by him as Loxosomatoiiles colonialis; which is, however, quite distinct 

 from the 'Siboga' species in other respects. 



22 



