132 Lt. -Colonel H. H. GoJwIn-Austen on 



degree, and is indicated in a different way or absent as in 

 natalensis (PI. VI. fig. 2) and in a yet unnamed species 

 no. 15 to be described later on. 



For some time I was at a loss to account for the presence 

 and meaning of certain very defined lines on the surface of 

 the main shaft of the penis when making drawings of the 

 genitalia : see sj/mmetricus and melvilli, figured in the next 

 part. It would appear that this folding becomes so buried in 

 the muscular tissue wliicli holds the folds together, as a last 

 phase, that it is concealed altogether. In the other direction 

 the folding is so slight that only an indication of it remains, 

 as in no. 15; in cajJsula and nos. 12 and 13 (also undescribed 

 species) it is altogether absent, 



Peltahis caledonensis, sp. n. (PI. II. figs. 1, la.) 



Locality. Iloun lloek, (Jaledon Div., Cajie Colony 

 {ConnoUij) . 



Shell conoid, no perforation ; sciilj)ture decussate near 

 apex, rest beautifully fine and regular, microscopical longi- 

 tudinal striation, crossed by the lines of growth; colour dull 

 ochraceous or straw; spire subconoid ; suture impressed; 

 whorls 4^ ; aperture oblique, rotundate, curve near circular 

 on the thin peristome ; columellar margin vertical, not 

 thickened. 



Size: major diameter 12*75, minor ll'O; alt. axis 6 mm. 



This shell is remarkably like that of capsula, Bs., from 

 Simonstown in the sculpture, but is much higher in the spire, 

 also very close in form to typical hudsonicp, Bs. 



Connolly, writing to Mr. J. Ponsonby, says : " No. GO, Pel- 

 tatus sp. 2 in spirit : these will, I hope, be of interest, for 

 Colonel Godwin-Austen will at once settle whether they are 

 Peltatus or Ilelicarion, and whether or not they are the same 

 as the shell from Simonstown, one of those already in your 

 hands unnamed [capsxdaj Bs.], and also whether both the 

 Houn Hoek and Simonstown shells = i\?/^af«s hudsonice, as 

 Burnup tiiinks probable." 



Animal. — Extremity of the foot truncate (PI. V. fig. 1 c)^ 

 the lobe above elongated. Foot divided. Kight sholl-lobe 

 long and narrow (Pi. II. fig. Id), much longer than in what 

 has been called P. hiidsoniiv, yi\r.=^aluicola, var., from 

 Grahamstown. The left shell-lobe is triangular and small 

 (PI. II. fig. 1). Visceral sac (same figure) is closely mottled 

 black, and forming thus two parallel bands, the lower the 

 most distinct near the kidney, the upper one arranged in 

 zigzags. The apical whorls black, with large white spots. 



