4 DISCOVERY REPORTS 



In the order Pleurogona, suborder Stolidobranchiata, I have again followed Berrill (1950), who 

 gave convincing reasons for dividing the family Styelidae Sluiter, 1895, into two subfamilies only, 

 Botryllinae Adams, 1858, and Styelinae Herdman, 1881, although Huus and others have recognized 

 a third subfamily Polyzoinae Hartmeyer 1903. 



Two minor points in which the present classification differs from that of Huus concern the genera 

 Herdmania Lahille, 1887, and Bathypera Michaelsen, 1904. I have used the generic name Herdmania 

 for the species H. momns (Savigny), although Huus used it for a polyclinid species generally referred 

 to as Euherdmania claviformis (Ritter). The generic name Herdmania was preoccupied when Ritter 

 (1903) proposed it, as he himself later recognized (Ritter, 1904). 



The position of Bathypera is still doubtful, and although Huus placed this genus in the family 

 Molgulidae, I believe that a number of characters show it to be better placed in the family Pyuridae. 



SYSTEMATIC LIST OF SPECIES IN THE COLLECTION 



Order ENTEROGONA Perrier, 1898 

 Suborder APLOUSOBRANCHIATA Lahille, 1886 

 Family POLYCLINIDAE Verrill, 1871 

 Subfamily Polyclininae Adams, 1858 

 Genus Aplidium Savigny, 1816 

 A. circumvolutwn (Sluiter) A. caeruleum (Sluiter) 



A. fuegiense Cunningham A. stanleyi sp.n. 



A. variabile (Herdman) A. qnadrisidcatum sp.n. 



A. falklandicum sp.n. A. seeligeri sp.n. 



A. radiatum (Sluiter) 



Genus Synoicum Phipps, 1774 

 S. adareanum (Herdman) S. giardi (Herdman) 



S. georgianum Sluiter S. kuranui Brewin 



Genus Aplidiopsis Lahille, 1890 

 A. discoveryi sp.n. 



Genus Protopolyclinum gen.n. 

 P. pednnculatum sp.n. 



Subfamily Euherdmaniinae Seeliger, 1906 



Genus Ritterella Harant, 1931 

 R. vestita sp.n. 



Family DIDEMNIDAE Giard, 1872 

 Genus Didemnum Savigny, 181 6 

 D. studeri Hartmeyer D. trivolutum sp.n. 



D. biglans (Sluiter) 



Genus Leptoclinides Bjerkan, 1905 



L. diemenensis Michaelsen 



Genus Trididemnum Delia Valle, 1881 

 T. auriculatum Michaelsen 



