10 



This very variable species is the analogue of L. testudinalis of 

 the North Atlantic waters, though larger. Two well-marked 

 varieties may be noted. One tessellated with about equal pro- 

 portions of green and whitish, the interior marginal limb broad 

 and tessellated, the dark color predominating. In the other the 

 colors are arranged rather in stripes, the internal limb is nar- 

 rower, and the light color predominates. Very probably L. scu- 

 tum, Esch. is only another variety. 



Lottia ctmbiola. Testa solida, depresso-conica, arcuata 

 (apice eccentrica) glauco et fusco-olivaceo radiata, radiatim cre- 

 berrime puncto-striata : apertura elliptica, margine minutissime 

 crenulato : facies interna, albida, spadiceo sordidata ; limbo lato, 

 fusco et albo tessellato. Long. T 9 a , lat. fg-, alt. t 3 q poll. Hab. 

 Bay of Valparaiso. 



A small, rather smooth shell, arched in every direction, in 

 consequence of attaching itself to other shells. When fresh it is 

 very prettily radiated. 



Patella (Lottia ?) textilis. Testa depressa, oblique conica ; 

 apice anteriori, acuto ; costis latis, elevatis, subplanulatis, nodosis 

 ad 15 radiantibus ; epidermide viridi, punctis albidis quadratis 

 reticulato : basi ovato-rotundato, limbo marginali albido et fusco- 

 viridi fimbriato : facies interior albida ; fundo piceo. Long. 1, 

 lat. |, alt. T 3 jj poll. Hab. Straits of De Fuca and Killimook. 



Like some varieties of P. viridula; but its base is less orbicu- 

 lar, its color is darker green, and the reticulations are finer and 

 less in zigzag ; the ribs are less numerous, nodular, and not paler. 

 Its remote locality favors the idea of its being distinct. 



Patella (Lottia ?) scabra. Testa parva, scabra, per-inequila- 

 teralis, oblique arcuato-conica, pal lido virens, nigro diverscmode 

 virgala, costis radiantibus scabrosis ad 15 ornata ; basi ovata : 

 facies interna albida ; fundo piceo, limbo marginali viridulo et 

 piceo fimbriato. Long. £, lat. §-, alt. f poll. Hab. San Fran- 

 cisco. 



About the same size, and may be only a variety, of P. textilis. 

 Its arched form, rough surface, coarse black stripes, and different 

 locality, seem to warrant its separation. 



Patella (Lottia?) aeaneosa. Testa parva, tenuis, depresso- 

 conica, sub-equilateralis, kevis, pallide virescens, ramulis rubigi- 



