BY G. I. PLAYFAIR. 2] 



tained, they should stand as Tr. hispida var. crenatocoUia (Mas- 

 kell), and Tr. hispidd var. piscatoris (Fisher), respectively; the 

 latter has priority. I have not found either here yet. 



Yar. AUSTRALICA, n.var. (PL iii., f.9). 



Lorica ovalis vel oblonga, coUo nullo, spinisobtusis bacillaribus 

 dense obtecta. 



Long. 32, lat. 22 /x; dimensiones etinm var. granidatcp, infra. 



Guildford 45, 76. 



A form of Tr. hispida a little larger than the type and char- 

 acterised b}^ short, blunt, bacillar spines set, as usual in this 

 species, very close together, and showing at the edge (as Maskell 

 observes of 7r. crenatocollis) "a continuous border of points." 

 This would be the Australian type of the species, were it not so 

 rarely found; as it is, that honour falls to the succeeding variety, 

 of which var. australica is the fully developed spinous form. 



Var. GRANULATA, n.var. (PI. iii., f.ll, 12). 



Lorica crasse denseque granulata nee spinosa; collo nullo. 



Long. 27-42, lat. 17-35 /x. 



Botany 142, 145; Guildford 45, 77, 114: Centennial Park 133; 

 Casino 189; Lismore 236, 237, 238, 241, 242, 245. 



The prevailing type in this country; it is a form of var. aus- 

 tralica in which the granules have not developed into the usual 

 bacillar spines of that variety. Intermediate states exist, and, 

 even in granular forms, the polar granules are very often pro- 

 duced as very short spines. The dimensions most commonly 

 observed are, long. 30-34, lat. 20-24 //,. In shape, the lorica is 

 oblong or oval-oblong, more rarely distinctly oval, dark brownish- 

 yellow in colour. 



Var. RECTANGULARis Br. Schroder. (PI. iii., f.lO). 



Lorica rectangularis, lateribus planis, apicibus truncatis vel 

 rotundato-truncatis, angulis rotundatis, spinis vel granulis dense 

 ornata. 



Long. 31-36, lat. 18 20/x. 



Botany 37, 142; Centennial Park 133; Lismore 238. 



Cf. Stein, /.c, T. xxii., f.34; Schroder, Fischereiv. z. Trachen- 

 berg, T. ii., f.8. This form is closely connected with var. aus- 



