334 TtRUONlLLA. 



T. GRACILTOR, T. PANAMENSIS, T. SIMILIS, T. STRIOSA, T. TURRITA, 



T. ACUMINATA, C. B. Adams. Panama. 



T. ACULEUS, T. AFFINIS (T. undata, Carp., a syn.), C. B. Adams. 



Panama and Mazatlan. 



T. CINCTELLA, T. CRATICULATA, T. SUBULA, Morch. 



W. Co. Centr. Am. 



IV. Polynesian and Australian Species. 

 T. HOFMANI, Angas. PI. 76, figs. 41, 42. 



Rather thin, white, shining ; whorls 13, slightly convex, lon- 

 gitudinally broadly ribbed, interstices narrow, smooth, ribs 

 abruptly ceasing at the periphery of the last whorl. 



Length, 10 mill. Port Jackson, Australia; Tasmania. 



Described as T. nitida, Angas, a name preoccupied by A. 

 Adams. T. Marise, Tenison-Woods (fig. 42), from Tasmania, 

 appears to be identical. 



T. FESTIVA, Angas. PL 76, fig. 45. 



Semipellucid, white, with a narrow chestnut band on the 

 middle of the whorls, two bands on the body-whorl ; whorls 8, 

 rather convex, finely longitudinally plicate, the interstices 

 microscopically spirally striate, suture deep, last whorl smooth 

 at the base. Length, 4 mill. 



Port Jackson, Australia. 

 T. FUSCA, A. Ads. PI. 76, figs. 46, 47. - 



Whorls 8, very narrow, rounded, with deeply impressed suture ; 

 yellowish or brownish, with a central darker band, two bands 

 on the body-whorl, closely longitudinally plicate, the ribs 

 becoming obsolete towards the base. Length, 6 mill. 



Australia, Tasmania, Japan. 



In the darker-colored specimens the bands are obscure ; in 

 the lighter-colored, they are distinct ( T. bifasciata, A. Adams 

 (fig. 47). The form is narrower, more cylindrical, longer than 

 T. f estiva, but may be only a variety of it. 



T. MACLEAYANA, Tenison-Woods. PI. 76, fig. 44. 



Narrowly cylindrical, thin, translucent, white ; whorls 12, 

 flatly convex, with deep suture, longitudinally ribbed, ribs ter- 

 minating at the periphery, interstices and base smooth. 



Length, 9 mill. Tasmania. 



