338 OBSERVATIONS ON THE CHLORAEMIDAE, 



met with is that of Dujardin. In hi3 account of Chloraema 

 Edwardsii* he speaks of the sort of fleece or felt with which it is 

 covered, composed of hollow flexible filaments, club-shaped at the 

 extremity, and constituting a series of minute stalked glands 

 secreting the mucus. Costaf in his account of Siphonostoma 

 diplochaitos makes mention of the papillae or stalked glands, as he 

 regards them. Those of Lophiocephalus he describes as vascular 

 and as having an aperture at the extremity for the discharge of 

 the mucus. 



Leuckart in his "Beitrage zur Kenntniss der Fauna von Island" J 

 also describes the papillae of Siphonostomum vaginiferum as 

 appendages of the vascular system ; but he contends that, though 

 the extremity may present a pit-like depression, it is never per- 

 forated. He is inclined to favour Rathke's and Costa's view that 

 they have to do with the secretion of the mucus, but suggests that 

 they may also be concerned in the process of respiration, 



Schmarda§ in his description of Trophonia xanthotricha men- 

 tions the presence in each segment of a transverse row of little 

 suckers which when retracted appear like minute warts. These, 

 he states, the animal uses to fasten itself, and also employs them 

 in locomotion, like the tube-feet of the Echinoderms. 



Quatrefages|| gives the following account of these structures 

 in Chloraema Dujardinii : — " Les poils recouvrent le corps tout 

 entier a l'exception de la face ventrale. lis sont formes par une 

 tige tres grele, qui se renfle brusquement a l'extremite. Ce ren- 

 flement est ordinairement presque piriforme aux poils voisins des 

 pieds et simplement arrondi sur le reste du corps. A l'interieur, 

 on distingue des cloisons cellulaires irregulieres, qui rappellent 



* " Observations sur quelques Annelides marines." 'Ann. des Sci. Nat.' 

 2e sene, tome xi. (1839), p. 289. 



+ "Description de quelques Annelides nouvelles du Golfe de Naples." 

 'Ann. des Sci. Nat.' 2e s6rie, tome xvi., 1841. 



% Archiv f. Naturg. xxix. (1849). 



§ Neue wirbellose Thiere. 



|| Histoire Naturelle des Annoys," tome i., p. 474 (1865). 



