Being Transactions of the S. Afr. Phil. Society. Vol. XVII. 23 



than the bladder itself, opening near the vulva (fig. 2/). — The penis 

 7-10 mm. long by diameter of 1-5-2, nearly cylindrical, a little 

 tapering anteriorly (fig. 22) ; its anterior half blackish, the rest 

 yellov^ish ; the inside is also dotted with black and shows fine longi- 

 tudinal folds, between which one stronger than the others and con- 

 tinued up to and on to the small, 2 mm. long, whitish conical glans. 

 This last and the top of the prseputium show small cones partly set 

 in longitudinal series (fig. 23) ; most of the cones carry a horny 

 bhorn, a little curved and of a height up to 0-28 mm. (tig. 24). 



The form here examined probably represents a variety of the 

 typical Acl. cirrhifera. 



CEPHALASPIDEA. 



PHILINID^. 



Philine, Ascanius. 

 Philine, Ascanius. Vetensk. Ak. Handl, 1772, p. 329. 

 Lobaria, 0. Fr. Muller. Zool. Dan. Prodr., 1776, pp. xxix., 226. 



— Zool. Dan., iii., 1788, pp. 30-31, tab. C, figs. 1-5. 

 Bullcea, Lam. System des An., s. v. 1801, p. 63. 

 Philine, Asc. Bergh, Malacol. Unters. v. 1900, p. 275.— Die 



Opisthobranchiata der Siboga Exped., 1905, pp. 28-32. 

 Animal sat applanatum (testa non recondendum) ; clypeus 

 frontalis magnus, subquadratus, postice non lobatus, oculis externe 

 conspicuis nullis ; sub margine laterali clypei antice rhinophoria 

 parva plicata ; osphradium parvum simplex ante fissuram branchialem 

 situm. Pallium testam omnino includens, postice paullum supra 

 et infra prominens ; glandula spiralis nulla. Podarium breve, latum, 

 epipodiis sat crassis lateribus interstitium inter pallium et clypeum 

 implentibus. 



Testa interna tenuis, fragilis, pellucida, alba, sat applanata ; spira 

 minuta depressa ; apertura amplissima, postice angustior ; columella 

 angusta callo levi. 



Mandibulae nullae. Eadula rhachide nuda, pleurae dente laterali 

 fortissimo uncinato et interdum dentibus externis (1-6) hamatis. — 

 Glandulas salivales parvae sacciformes. Ventriculus masticatorius 

 (fere semper) laminis calcareis fortissimis subsimilibus oblongis tribus 

 armatus, utrinque laterali et inferiore singula. 



Penis inermis, apparatu prostatico fortissimo praeditus. 



These animals are of very peculiar form ; their thin shell quite 



