91 



in number to the external orifices i. e. a single funnel to each gland. In 

 two instances I counted four or five funnels among the coils of the 

 tubules and there may be more; the »mucous gland« of Urochaeta 

 therefore consists of a tube opening on to the exterior by 

 a single orifice, and branching distally into a number of 

 tubules each of which opens into the coelom by a cili- 

 ated funnel. I particularly endeavoured to ascertain if the ciliated 

 funnels Avere arranged in any regular — metamerie — fashion ; in the re- 

 gion of the body occupied by the gland the septa are delicate and in 

 places hardly distinguishable ; the limits of the segments can however 

 l)e partially made out by the help of the ventral nerve cord. But even 

 with this assistance I cannot find evidence of any regularity in the dis- 

 position of the ciliated funnels , they are principally, if not entirely, 

 confined to the ventral region of the gland and are usually placed on 

 the periphery of the glandular mass ; but in some cases there are ciliated 

 funnels in the midst of the glandular mass entirely, surrounded by tu- 

 bules. The ciliated funnels seem to be confined to the posterior region 

 of the gland; it is I think fairly certain that the ciliated funnels 

 are disposed irregularly and not metamerically. 



At present I am unable to say whether there is, or is not, any con- 

 nection between the »mucous glands« and the nephridia of the few 

 following segments, which have a rather different appearance from the 

 nephridia of the body generally. There is however a certain ressem- 

 blance between the »mucous gland« of Urochaeta and the »head kid- 

 ney« of the larval Polygordius ^ as described by Hatschek, and of 

 certain Polychaet larvae ^, w hich will be obvious from the foregoing 

 description. The only difference, in fact, of importance is the presence 

 of ciliated funnels in Urochaeta] in the larval Annelids the tubes open 

 by i)flame cells« or else end blindly. The bearing of these facts upon 

 the morphology of the excretory system in Annelids Avill be more fully 

 discussed in an illustrated account of the anatomy of Urochaeta which 

 I hope shortly to publish. 



London, Dec. 28tli 1887. 



3. Preliminary Notes on the Anatomy of Perichaeta. 



By F. E. Beddard, London. 



eingeg. '^\. December 1887. 



(I) Salivary glands. Perrier was the first to describe these 

 organs in P. HouUeti^. Besides nephridial tufts, which Perrier af- 



* Ed. Meyer, Uuoted by Lang, Die Polycladen. Naples Monogi'aphs. 

 1 Nouv. Arch. d. Mus. t. VIIL (1872. p. 100. pi. IL figs. 38 A, 44.) 



