TJie Opistliohranchiata of South Africa. 



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 

 yellowish ; the inside is also dotted v^ith 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 praeputium show small cones partly set 

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

 thorn, a little curved and of a height up to 0-28 mm. (fig. 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. 



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



Philine, Asc. Bergh, Malacol. Unters. v. 1900, p. 276.— Die 

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



Animal sat applanatum (testa non recondendum) ; clypeus 

 frontalis magnus, subquadratus, postice non lobatus, oculis externa 

 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 



