212 ]\Ir. W. L. Distant on Afriran Pentatoniiilre. 



XXI. — On an undescribed Species 0/ Dorcasia. 

 By Hugh C. Fulton. 



Dorcasia ponsonhyi, sp. n. 



Shell depressed globose, moderately umbilicated, rather 

 thin, subtiansparent, yellowish brown above, whitish below ; 

 whorls 4|, slowly increasino;, nucleus almost smooth, lower 

 whorls with rather rough and irregular oblique striae, last 

 whorl covered with a microscopic granular sculpture ; peri- 

 stome thickened, yellow, margins joined by a slightly raised 

 reddish callus, aperture subovate, pellucid within. 



Maj. diam. 27, min. 22 ; alt. 16 mm. 



Hab. (yape of Good Hope. 



This shell has often been confounded with Dorcasia lucana, 

 Miiller, from which it can be readily separated by its depressed 

 form and microscopic granular sculpture. The specimens of 

 lucana seen by me are more or less malleated on the last 

 whorl, a feature that is absent in ponsonbi/i, which has also 

 half a whorl less. In some specimens the peristome is 

 wliitish, in others it is of a reddish colour. 



I have much pleasure in naming this shell in honour of 

 J. H. Ponsonby, Esq., F.Z.S., who has done so much good 

 work in connection with the South-African molluscan fauna. 



XXU.—Rhynchotal Notes.— lA. By W. L. Distant. 



African Pentatomidge. 



(Continued from p. 99.) 



Neocrollius, gen. nov. 



Head shorter than pronotum, longer than broad, the 

 lateral and apical margins very strongly reflexed, the lateral 

 margins concavely sinuate, lateral lobes with their apices 

 obtusely acute, considerably passing apex of central lobe but 

 r.ot meeting beyond it ; eyes prominent, subpedunculate ; 

 ocelli near base, much nearer eyes than to each other ; 

 antennse five-jointed, first joint not reaching apex of head, 

 first and second subequal in length, third and fourth sub- 

 equal, fifth longest ; pronotum shorter than broad, but more 

 than half as long as broad, the anterior margin a little con- 

 cave, the posterior margin straightly truncate, the lateral 



