tura ovata ; margine crenulato ; facies interna livida, fundo ferru- 

 gineo, radiis albidis insigni. Long. \\, lat. y 9 ^, alt. ^ poll. Hab. 

 Cape de Veids and Madeira. 



Somewhat like what I suppose to be P. scutellaris, from the 

 Mediterranean, especially its interior, but more elevated and less 

 elongated. 



Patella instabilis. Testa olivaceo-cervina, elongata, ele- 

 vata, ad latera compressa, creberrime radiatim striata, apice sub- 

 centrali, obtusa, castanea : apertura oblongo-elliptica ; margine 

 integro : facies interna lactea. Long. 1^, lat. J£, alt. T 8 0- poll. 

 Hab. Puget Sound. 



Resembles P. compressa, but is more smooth and solid, and 

 the apex more nearly central. It may have derived its form 

 from being attached to some arched body. 



Patella cinnamomea. Testa parva, ovalis, convexa, tenuis, 

 einnamomea, cum striis radiantibus, tenuibus, confertissimis, im- 

 bricato-asperis, apice acuto, antico, ad marginem valde decli- 

 nato ; apertura? margine anteriori excurvato, intus costa. alba 

 marginali munito. Long. j, lat. § , alt. -£$ poll. Hub. Ne*w South 

 Wales. 



Closely allied to P. Galathea, Lam. which, however, is snow- 

 white, more circular, the apex more central, and the stria? much 

 coarser. 



Patella conica. Testa parva, conoidea, elevata, valde regu- 

 laris, inornata, vel lineolis obsoletis radiantibus et concentricis 

 striata ; colore luteo-cinereo : apertura rotundata, margine sim- 

 plici, limbo marginali planato. Long. ||, lat. £, alt. f poll. 

 Hab. Puget Sound. 



Similar to P. scurra, Lesson, but is more elevated, less sym- 

 metrical, and more delicate in structure and markings, especially 

 in the radiating striae. 



Lottia pintadina. Testa diversissime figurata et picta, tenuis, 

 ovato-rotundata, radiatim et confertim striata, smaragdina, inter- 

 dum fuscescens vel cinerascens, maculis crebris albidis tessellata 

 aut radiata ; apice plerumque sub-centrali, plus minusve elevata : 

 facies interna coeruleo-albida, nitens ; fundo piceo ; limbo lato, 

 piceo et albido tessellato. Long. 2, lat. If, alt. f poll. Hab. 

 Straits of De Fuca, Puget Sound, and Mouth of Columbia River. 

 2 



