.\It»|{|ii.'^. — Rotifoi-a not prerionsJy reeorded in iVe;/' Zealand. 165 



Fam. AsPhAXcHXiDAE. 



Asplanchna brightwelli (Tosse. 



This footless Rotiferon may be considered fairly coiumon in North Otago 

 ;(.nd Sonth Canterbury, although a year may be passed with frequent search- 

 ing without coming across a single specimen. They are most likely to be 

 met witli between May and July in small ponds, and they seem to prefer 

 the company of other species of Rotifers. The New Zealand representatives 

 are smaller than the Euiopean, the females varying in size from 5^77 in. 

 to Jpf in. 



Asplanchnopus myrmeleo Ehrenberg. 



One of the finest species in the class, and plentiful from the Shag River to 

 the Waitaki. I7sually associated witli RijdaUna seiita and various Brachioni. 

 ^Iv specimens, which are all females, measure from 0^5 in. to 377 in. 



Fam. 8 Y n( 'Ha eta da e. 



Synchaeta pectinata Ehrenberg. 



A single specimen brought to me by Mr. Gordon Garrow, of Ardgowan, 

 who found it in a pool at Balruddery, near the Kakanui River. It answers 

 the description of the European species, but is smaller, measuring onlv a 

 little over y^o iii- 



Fam. Triarthridae. 



Polyarthra platyptera Ehrenberg. 



By no means common, and appears to aSect shallow grassy puddles. 

 Found in winter around Oamaru. Length, ^^^o in. 



Triarthra longiseta Ehrenberg. 



This skipping Rotiferon is to be met with frequently in North Otago, 

 and I am surprised that it has not been recorded before. It differs from 

 Hudso)! and Gosse's plate inasmuch as the ciliary wreath is thicker and 

 more noticeable. The body, without spines, measures y^o ii^- 



Triarthra mystacina Ehrenberg. 



This species has been identified by Mr. Rousselet from specimens obtained 

 by me from a pond on the North Road. Oamaru. 



Fam. Hydatixidae. 

 Rhinops vitrea Hudson. 



Discovered in great numbers in a horse-trough at Weston, in the 

 beginning of November, by Miss Gore, of Oamaru. Measures from Y^ryiKi- 

 to J^ in. 



Notops brachionus Ehrenberg. 



Obtained in many localities, from the Woodhaugh Gardens, in Dunedin, 

 to a pond in Temuka. Plentiful from March to May. Length, J^ in. 



