34 



85. occidentalis, Reeve. 



86. oculus, Born. 



87. opea, Nidt. 



88. Oregona, id. 



89. pencillata, Reeve. 



90. pentagona, Born. 



91. petulata, Reeve. 



92. pica, iJ. 



93. plana, Phil. 



94. plicata, Born. 



95. pluinbea, Zaw. 



96. pruinosa, Krauss. 



97. puncturata, Zawa. 



98. radians, Gmel. 



99. rota, Chem, 



100. rustica, Zwm. 



101. saccharina, id. 



102. sanguinalis, Reeve. 



103. sanguinans, is?. 



104. scabra, Nutt. 



105. scalata, Reeve. 



106. scutellaris, Zawz. 



107. spectrum, iVw#. 



108. squamifera, Reeve. 



109. stellularia, Qtwy. 



110. stipulata, Reeve. 



111. tenera, ^rf. 



112. testudinaria, Zi«». 



113. toreuma, Reeve. 



114. traraoserica, Martyn 



115. umbella, GW/. 



116. urabonata, Nutt. 



117. uncinata, Reeve. 



118. undato-lirata, «?. 



119. ustulata, id. 



120. variabilis, /Sow. 



121. varicosa, Reeve. 



122. variegata, ic/. 



123. venosa, id. 



124. verriculata, id. 



125. vespertina, M?. 



126. vidua, id. 



127. vulgata, Z««». 



128. zebra, Reeve. 



129. zebrina, Less. 



Figure. 



Patella longicosta. PI. 25. Pig. 146. Shell of a strongly-ribbed spe- 

 cies, in which the ribs extend more than usually beyond the margin. 



Genus 2. SCUTELLA, Broderip* 



Animal ; like that of Patella. 



Shell ; ovate, more or less depressly conoid, mostly cancellated 

 by the crossing of concentric and radiating ribs or stria. 



In the Cumingian collection is a series of shells chiefly from Central 

 America and the Philippine Islands, only a few of which have been de- 

 scribed, offering good distinguishing characteristics apart from Patella. 

 They are uniformly smaller and more delicate, and are mostly finely sculp- 

 tured. When fully monographed, their generic features will be better 

 understood and explained. 



1. Arabica, Riipp. 



2. asperulata, Adams. 



3. cinnamomea, Gould. 



4. costata, Adams. 



Species. 



5. crennlata, Brod. 



6. elongata, Adams. 



7. ferruginea, id. 



8. Galathea, Lam. 



9. granulosa, Adams. 

 10. lsevicostalis, id. 



* The word Scidella is also used for a genus of Radiata, but there is not much chance of 

 confounding a Limpet with a Sea-Egg. 



