ALCIOPIDAE 



IIS 



is scarcely, if at all, denticulated. The end-piece is very slender and rather short. There 



is a pair of globular anal cirri. 



Remarks. I find it impossible to decide whether this species is the same as Theel's 



M. borealis without a direct comparison, and unfortunately Theel's species is not 



represented in the museum collection. The present species has not been seen since its 



original description. 



Family ALCIOPIDAE 



1. Bristles all of one kind ... ... ... ... ... ... ... ... ... ... 2 



Bristles of more than one kind ... 



2. Bristles all long simple swimming chaetae 

 Bristles all long compound swimming chaetae 



3. The foot has two cirriform terminal appendages 

 The foot has one cirriform terminal appendage 

 The foot has no cirriform terminal appendage 



4. Both long swimming chaetae and short acicular bristles present 



5. Long swimming bristles simple... 

 Long swimming bristles compound 



Genus Alciopa, Audouin and Milne-Edwards 

 Body elongate and transparent. The head ends in a pair of enormous eyes. Five 

 tentacles, of which the median is very small. Proboscis with a crown of papillae, of 

 which the two lateral papillae are only slightly longer than the rest. Three pairs of 

 tentacular cirri, followed by about three chaetigers with small undeveloped feet. In the 

 female the dorsal cirri of the first pair of feet are converted into seminal pouches. 

 Dorsal and ventral cirri are foliaceous. The pedal lobe has no terminal appendage. The 

 bristles are all long, delicate, capillary and simple. Prominent segmental glands are 

 present. 



Alciopa cantrainii (Delle Chiaje). 

 Fauvel, 1923, p. 203, fig. 76 a-c. 

 Occurrence. St. 707 (i). 

 Specific characters. The characters of this species are those of the genus. 



Genus Vanadis, Claparede 

 Long, cylindrical, transparent animals. The head ends in a pair of enormous eyes. 

 The proboscis has a crown of long papillae. There are three to five pairs of tentacular 

 cirri. In the female a few of the anterior dorsal cirri are converted into globular seminal 

 pouches. The pedal lobe ends in a single cirriform process. The dorsal and ventral cirri 

 are foliaceous. The bristles are all of a similar kind, very long, fine, transparent and 

 compound. Prominent, deeply pigmented segmental glands are present. 



1 . Body colour purplish brown ... ... ... ... ... ... ... V. violacea 



Body colourless, transparent ... ... ... ... ... ... ... ... ... 2 



2. With three pairs of tentacular cirri ... ... ... ... ... ... V.formosa 



With four pairs of tentacular cirri ... ... ... ... ... ... ... ... 3 



3. The proboscis carries a pair of long, lateral cirriform processes ... ... V . crystallina 



The proboscis is devoid of cirriform processes ... ... ... ... V. antarctica 



