DESCRIPTIONS OF GENERA AND SPECIES 349 



(la) Fridericia antarctica, Beddaed. 



Priderieia antarctica, Bebdaeb, Proc. Roy. Phys. Soc, 1892-93, p. 41. 



Definition. Length, \% mm.; number of segments, 6^ ; setae, /\.-6 per lundle. Anteseptal part 

 of nephridium as large as postseptal, with convoluted duct. Spermatheca with numerous 

 diverticula. On segments XIII-XV papillae connected with peculiar cells surrounding 

 nerve-chord. Hab. — New Zealand. 



This species, though agreeing in most of its characte;r8 with F. galha, is apparently 

 to be distinguished by masses of cells surrounding the nerve-chord in certain segments 

 which appear to be comparable to those of F. ratzeli and Pachydrilus (see p. 32^). 

 The cells in question are large, pear-shaped, and granular ; they have, indeed, 

 a glandular, rather than a nervous, look ; but, being enclosed in a common sheath 

 with the nerve-chord, favours their nervous nature. 



The clitellum occupies segments xi-xiii, and is developed all round the body. The 

 setae of xii are, as usual, absent. The salivary glands are branched. The septal 

 glands occupy iv-vii, and the intestine commences in xiv. The sperm-duct funnel 

 is three times as long as broad. 



Genus Henlea, Michaelsen. 



Syn. Enohytraeus, d'Udekem et alii (in part.). 

 Archienchytraeus, ElSEN (in part.). 



DEPlWiTiOir. Setae diflferent in form and arrangement, according to the species. 

 Head-pore between prostomium and buccal segment ; no dorsal pores. Oesophagus 

 sharply marked off from the intestine. Dorsal vessel arises in front of the 

 clitellum; blood colourless. Duct of nephridium springs from the postseptal 

 portion near to the septum. 



This genus has been recently instituted by Michaelsen in his Synopsis of the 

 family (5). It forms undoubtedly a somewhat heterogeneous assemblage of 

 species, which are chiefly bound together by the fact that the oesophagus is 

 distinctly separated from the intestine by a constriction, and by the ante-clitellian 

 origin of the dorsal vessel ; as a rule, there are oesophageal glands at the commencement 

 of the intestine; all these points ally the genus Henlea to the genus Buchholzia. 

 There appear to be no other characters distinctive of the genus ; some have and 

 some have not salivary glands ; H. puteana has two pairs of spermathecae, which 



