666 RHIZOPODS OF SVDNKY AND LISMORE, 



Length 24-34, breadth 12-16, thick 12-13, orif. 6-1 0/x. 



Eveiywhere, common. 



Penard, Etudes s.l. rhiz., p. 182, Pi. ix., f.97-104, has described 

 a var. minor (long. 15-25/x) which is a small form of the type. I 

 have not met with that form; it is replaced by var. lanceolata^ 

 which here almost invariably accompanies the type. On the face 

 of the tests, five or six, broad, longitudinal stride are often faintly 

 indicated, which break up, on examination, into series of broad 

 dashes, as in Eu. coiivpressa var. ohscura. These are the optical 

 expression of the body-scales. 



EUGLYPHA DENTATA V. ELONGATA, n.var. (PI. xH., f.l, 2). 



Test elongate, elliptical or subcylindrical, often asymmetrical, 

 circular in section, rounded behind; sides gently arched, often 

 nearly parallel, converging to the orifice. Orifice chitinous, 

 fimbriated, rarely angular or straight-edged. Body-scales always 

 perfectly circular, quincuncially arranged, very slightly over- 

 lapping and equally on all sides. 



Length 44-51, breadth 21-25, orif. 8-lOJ, scales 6/i. 



Lismore(187, 188, 1956, 197); Coogee(i4). 



This form is abundant in the Lismore samples noted, out of 

 weeds {MyriopliyUum) in the river (deep water). Both in shape 

 and in the body-scales, it differs entirely from the descriptions 

 and figures of Penard, Faune Rhiz., p. 524, and Wailes in Cash, 

 iii., pp. 63-65, PI. 43, f.l 4, 15. In details of the dimensions and 

 character of the nucleus, however, they agree perfectly. Nucleus 

 distinct ( x 10/x), always containing 3-8 dark granules towards the 

 centre. Described originally by Moniez as a Euglypha, I cannot 

 see any reason why this species should ever have been placed 

 under Sphenoderia. The orifice is peculiar certainly, but does 

 not in the least recall the characteristic orifice of the latter 

 genus; and the general character of both test and body-scales is 

 that of Euglypha. Moreover, mixed with it here, I find speci- 

 mens with distinct, angular, apparently siliceous, apical plates, 

 see var. hamuli/h-a, below. The asymmetrical character of the 

 test leads me to consider the fimbriation of the orifice as an 

 accidental occurrence in a soft, chitinous form, due to the tests 



