198 TRIVIA. 



dotted with brown, base conspicuously painted with four chestnut 

 spots, teeth usually elongated across the base. 



Length, -5-"9 inch. 



Mauritius, Borneo, New Caledonia. 



This species sometimes presents an unusually humped appear- 

 ance, the basal spots being often obsolete and the extremities 

 greatly produced ; such shells are mostly whitish and strongly 

 granulose, with the dorsal line well marked. 



I can see no reason for separating either C. Lienardi (figs. 57, 

 58), or G. tricornis (figs. 61, 62), both of which were described 

 by Dr. Jousseaume ; a careful examination of specimens of these 

 received from Mauritius, showing scarcety a varietal difference. 



Dr. Jousseaume himself admits that Lienardi is the veritable 

 cicercula. 



C. GLOBULUS, Linn. PL 20, figs. 59, (>0. 



Very closely allied to C. cicercula ; the main difference lies in 

 its more oblong form ; the dorsal line is absent, as are also the 

 granulations and the chestnut spots. Length, *8 inch. 



Mauritius, Borneo, New Caledonia. 



I believe future investigation will prove the identity of this 

 with C. cicercula. 



C. CHILDRENI, Gray. PL 20, figs. 53, 54. 



Pale yellowish brown, transversely ribbed throughout, ribs a 

 shade darker, extremities carinately winged beneath, teeth 

 minute. Length, -5-'6 inch. 



Annaa I., Borneo, New Caledonia. 



This is the only species at present known possessing the 

 peculiar winged projections at the base of the extremities. 



Subgenus TRIVIA, Gray. 



Shell subglobular, cross-ribbed, front of columella internally 

 concave, ribbed. 



Group A. Shell generally thin, aperture wide, outer lip narrow, 



margined. 



T. ONISCUS, Lam. PL 21, figs. 67, 68. 



Brownish or pinkish flesh-color, base whitish, ribs bifurcated 

 or wrinkled, dorsal line broad, smooth, flat. 



Length, '7 5-* 9 inch. Cape of Good Hope. 



