KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 48. N:0 1. 



13 



Shell usually somewhat depressed, aperture broader than high; sculpture con- 

 sisting of fine radiating ribs and very close s])iral striae; colour white; epidermis pale 

 brownish. H. (of the type) 1.7, D. 2.5 mm; whorls 4; height of aperture = twice 

 the spire (Forbes & Hanley 1853) Sc. crispata Fleming 1832. 



Shell less depressed; whorls more flattened above; body-whorl therefore more 

 angulated; aperture = :} the spire; H. 4.2, D. 5 mm; whorls 4% 



var. angulata Loven 1846. 



PL 2 tigs. 26—27. 



Shell higher than in the type; whorls more convex; body-whorl well rounded; 

 radiating ribs fewer; H. 2.3; D. 2.7; aperture 1.3 mm; whorls 4 



var, aspera Philippi 1844 (= var. paucicostata Jeffrby.s 1865). 



PI. 2 fig. 25. 



Fam. Fi^surellidae. 



Apex of the shell persistent, inclined backwards, or replaced by the anal slit 

 and in this case furnished inside with a septum or callus; rhachian tooth of the 

 radula broader than the uncini (subfam. Emarginulinse), 

 I. Anal slit above the anterior margin ; apex central or nearly so. 



A. Anal slit apical, situated before the iiiidtlle of the shell, bounded inside all around with a callus, 

 but without septum Glyphis Carpenter 1856 



(-= Fissurella Bruguiere 1792 pro parte). 



B. Shell internally with a septum below the hinder part of the anal slit. 



1. Apex persistent, bent backward; anal slit preapical 



Puncturella Lowe 1827. 



2. Anal slit apical and central Fissurisepta Seguenza 1862. 

 II. Anal slit in the anterior margin; shell without internal septum; apex persistent 



Emarginula Lamarck 1801. 



III. No anal slit; shell with an internal septum as in Puncturella; apex persistent; 

 radula aberrant, agreeing with Lepeta, 2.0.1.0.2, with tricuspidate rhachian 

 tooth and serrated uncini; eyes absent (systematical position uncertain) 



Propilidium Forbf:s & Hanley 1849. 



Olypliis Carpenter 1856. 



Shell depressed oval, with coarse and dense radiating ribs of alternating strength and concentric striie. 

 Colour yellowish or brownish, sometimes with darker reddish rays. L. circa 26, Br. 18, H. 8 — 11 mm (England) 



G. grseca (Linne 1758). 



Puiictiirolla Lowe 1827. 

 Shell more or less conic, with straight or arcuated anterior slope; apex poste- 

 rior or subcentral; sculpture consisting of radiating riblets of alternating strength 

 and concentric fine lines of growth; colour whitish. L. 7 — 15 mm 



P. noachina (Linne 1771). 



PI. 2 figs. 28—41. 



