BY G. I. PLAYFAIR. 669 



Sphenoderia fissikostris Penard, forma. 

 Test with relatively large scales, but the latter are irregularly 

 disposed in front- view. End-view circular. Length 40, breadth 

 19, thick 19, orif. lOJ/x. Botany (17). (PI. xh., f.ll). 



Var. SPLENDIDA, n.var. (PL xli., f.l4). 



Test covered with small, oval body-scales in a regular imbrica- 

 tion, about six series vertical, and six horizontal. 



Length 40-49, breadth 22-28, collar 15-16/^. Coogee (14). 



This is the only form of Sphenoderia I have noted with a 

 regular imbrication. Assidlna muscorwni Greeff {A. minor 

 Penard), Cyphoderia ampulla (Ehr.) Leidy, and Coryfhiun dabiam 

 Taranek, are also found here. 



Genus Cyphoderiopsis, gen. no v. 

 Test in shape like a Cyphoderia, but with scales as in Triufiua 

 or Nehela. 



Cyphoderiopsis longicollis, sp.unica. (PI. xli., f 12). 



Test smooth, hyaline, very like Cyphoderia ampulla, but with 

 a long, curved neck. Orifice circular(]), simple, with oi* without 

 a narrow, projecting, chitinous collar. Body-scales nebeloid, 

 circular, of various sizes, smaller on the neck, contiguous but not 

 overlapping, fastened at the edges by little dots of cement. 



Length 76-78, breadth 29-32, orifice 11-1 2 J, scales up to 6/x. 



Coogee (14, 24). 



A rare form out of Sphaynum. It is possible that the collar 

 becomes invaginate sometimes, but I have not seen it so. In 

 its characteristics, the test combines the features of Cyphudt'ria, 

 Nehela, and possibly also Ti'ineina. 



Genus T r i n e m a Dujardin. 

 Trinema caudatum, n.sp. (PI. xli., f.l.")). 

 Test in front-^'iew subcylindrical, a little narrowed towards 

 the mouth, conical behind, where it is drawn out into a very 

 decided tail, slightly constricted near the centre and below the 

 mouth. Orifice circular, strengthened with a palisade of short, 

 wick-like rods (or plicye) about a diameter apart. Body-scales 



