CALYPTRiED^. 59 



23. TECTUM-siNENSE, f. 30-34, Ckemnitz. — Lsevis inter- 

 dum elevata, laminis concentricis tectiformibus exfoliata. — 

 Smooth, exfoliated with concentric roof-like laminae. In 

 one edition of Linnoeus' work this stands as the first variety 

 of his Patella eqttestris. The species is also figured as second 

 variety of Martini's Lepas alba. Om- f. 30, 33, 34 represent 

 the normal forms ; 32, scabies of Eeeve, which has the 

 laminre more flattened ; and 31, the varia of Eeeve, but not 

 of Broderip, may be regarded as a state in which the first 

 contabulated lamina is very broad and flat and the second 

 has scarcely begun to be formed. 



24. ACULEATA, f. 45, Bvoderip. — Depressa, rotunda, Isevis, 

 cornea, aculeis parvis fornicatis distanter adspersa. — May 

 possibly be a variety of C. cornea, Broderip {cepacea), with 

 accidental points. 



Genus CEUCIBULUM. 



(Plate III., IV., and part of V.) 



Testa patelliformis ; appendice interna ovata, calyciformi vel 

 semicalyciformi, lateraliter per marginem unum vel per mar- 

 gines duos adnata. — The ' cup and saucer ' limpets normally 

 have a funnel-shaped cup free from the sides of the parietal 

 portion, except where joined in one lateral seam, but a sec- 

 tion of the species have the appendage looped or three- 

 cornered, and attached by two margins, and forming two of 

 the three angles. 



1. scuTULATUM, f. 1-6, Gray. — Patelliforme vel conicum, 

 fulvum vel fusco-purpurasccns, radiatim costatum, costis 

 crassis, subnodosis rubro-liueatis ; calyce infundibuliformi. — 

 The variety {rude, Broderip) with sharp ribs and wide 



