167 
being very abundant. Another limpet-like shell without 
spiral cap, referred to in a former paper, is identified by Mr. 
Jeffreys as Ancylus fluviatilis. Emarginula fissura is rare, 
and of Fissurella Graeca, one specimen only has been found. 
Caecum glabrum with spiral attached is common, and sepa- 
rate spirals are abundant ; only one specimen of Aclis unica 
has been met with ; Eulimella nitidissima is common ; 
Homatogyra rota, rare ; Cerithiopsis ad versa, common. A 
few of the embryonic and partly grown shells of Aplysia 
depilans have been found, but they are very scarce. In 
addition to the named specimens, a considerable number of 
other species not yet identified were exhibited. 
List of Embryonic Shells of Mollusca 
Anomia ephippium. 
Pecten varius. 
„ opercularis. 
„ tigrinus. 
„ testae. 
„ similis. 
„ maximus. 
Lima subauriculata. 
„ Loscombii. 
Mytilus phaseolinus. 
Modiolaria discors. 
Area tetragona. 
Montacuta bidentata. 
„ ferruginosa. 
Kellia suborbicularis. 
Sphaerium corneum. 
Cardium echinatum. 
„ fasciatum. 
Venus lincta. 
Venus. 
Tellina tenuis. 
Scrobicularia alba. 
Lyonsia Norvegica. 
Thracia papyracea. 
Saxicava rugosa. 
Patella vulgata. 
Helcion pellucidum. 
Tectura virginea. 
Emarginula fissura. 
Fissurella Graeca. 
Homatogyra rota. 
Caecum glabrum. 
Cerithium reticulatum. 
Cerithiopsis adversa. 
Scalaria communis. 
Aclis unica. 
Eulima distorta. 
Chemnitzia elegantissima. 
Odostomia unidentata. 
Eulimella nitidissima. 
„ acicula. 
Velutina laevigata. 
Lamellaria perspicua. 
Purpura lapillus ? 
Mangelia linearis. 
Cylichna cylindracea. 
„ truncata. 
Aplysia depilans. 
Spirialis Flemingii. 
Ancylus fluviatilis. 
