21 



no peculiarities; the single polian vessel is, however, very- 

 large in proportion to the size of the animal, measuring 

 3 mm. X 1*5 mm. We believe the above species to have been 

 hitherto undescribed. Ludwig's Thyone similis is, perhaps,, 

 its closest relative. 



CoLOCHiRUS DOLiOLUM (Pallas). 



For synonymy see Erwe, Willy, ontea. 



Numerous characteristic specimens from various stations. 

 The species evidently has a range embracing the whole 

 Southern Australian coastline. 



COLOCHIRUS QUADRANGULAPvIS (LcSSOn). ^ 



For synonymjr see Erwe, Willy, an tea. 



There are two excellently preserved specimens of this 

 well-characterized species. They were collected in the Great 

 Australian Bight by Mr. J. W. Howard. 



Family SYNAPTIDAE. 



TrOCHODOTA ALLAN! ( JosllUa) . 



(^)1912, Joshua, Taeniogyrus aJlani. 

 ('»)1912, Dendy, Chiridota allani. 

 (5' 1913, Joshua, Trnchodota allani. 



A single typical specimen from Kangaroo Island. It is 

 interesting to note the occurrence of this species so far west 

 of its hitherto recorded habitats. ' 



Family MOLPADIIDAE. 



Caudina chtlensis (J. Miiller). 



For synonymy see "Dendy and Hindle."(6) 

 This species is represented by over forty specimens, 

 collected in various localities off the South Australian coast. 

 Very great variation is exhibited in the size and form of the 

 individuals, and to some extent also in their colour and spicu- 

 lation. The series furnished specimens of which the largest 

 measured 125 mm. in length and about 60 mm. in breadth, 



^3) On .a new Holothurian of the genus Taeniogyrufi. Proc. 

 Rov. Soc, Victoriia, vol. xxv. (new series), part i., Melbourne, 

 1912. 



(4) Jour, of the Quekett Microscopical Club, ser. ii., vol. xii., 

 No. 72, pp. 105 to 107, 1912. 



(5) 1914, antea. 



(6) Jour. Linn. Soc, vol. xxx.. Zoology, London, 1907. 



