120 GENERA AND SPECIES. 



Spirally striated and longitudinally ridged 



527. berniciensis, 3^ in. pinkish white, inside of outer lip grooved, 



pillar slightly angulated. 



528. jenestratus, if in. yellowish white, inside of outer lip plain, 



pillar sharply angulated. 



Of 520 there are about a dozen monstrosities ; of the varieties the chief are alba, which 

 is white and much larger ; ventricosa, which has the whorls larger ; striata, which is ridged 

 on the upper whorls ; and gracilis, which is spirally ridged and more slender. Of gracilis 

 (the <species, not the variety) No. 524, there is a variety convoluta which is smaller and 

 has a longer spire and deeper suture. Of 525 there is also a variety with a longer spire and 

 smaller, this is turrita, which was at one time known as Tritonium turritutn. 



Galeomma. (GALEOMM1D&.) Plate vii. 



80. turtoni, in. x ^ in. shell thin and compressed towards each 

 end. 



Gastrana. (TELLINID&.) Plate viii. 

 98. frag His. ij in. x i in. ligament annulated irregularly. 



Gastrochcena. (GASTROCHCENIDM.) Plate xiv. 



159. dubia. ^ in. xf in. shell obliquely twisted from the beaks. 



Geomalacus. (LIMACID&.) Plate xviii. 



246. maculosus, 2 in. black, spotted with yellow; foot brown, 



with a light yellow sole. 



Goniodoris. (GONIODORID^E.) Plate xxxiii. 

 609. nodosa, i in. gills 13, pinkish or yellowish white. 



castanea, i in. gills 6 or 7, brown, spotted with white. 



Haliotis. (HALIOTIDsE.) Plate xxi. 



333. tuber culata. 4 in. brown and pale green, holes from 6 to S. 



Helcion. (PATELLIDSE.} Plate xxi. 



325. pellucidum, f in. brown, with thin streaks of blue. 



Helix. (HELICID^E.) Plates xix., xx. 



"Without umbilicus 



276. nemoralis, i in. lips brown. 



265. aspersa, if in. lips white, whorls 4^, spiral bands generally 



confluent, crossed by transverse patches. 



273. hortensis, i in. lips white, whorls 5 J, spiral bands distinct 



and not crossed by transverse patches. 



