MOLLUSCOUS ANIMALS. 
153 
SOLEN GLADIOLUS, t. 43./. 4, 4. r -S' \ 
A species which has long been well known in this country, but which I believe has never yet been pro- 
perly distinguished from the common European species, Solen Siliqua. In form the two species resemble 
each other very nearly, the S. Gladiolus is, however, higher (or wider as some would say) than the S. Siliqua, 
and this difference is more remarkable near the posterior part. S. Gladiolus is also in general, a little curved. 
I am aware that this latter circumstance cannot be regarded as a specific difference, since there is a variety of 
S. Siliqua common on our shores which is also a little curved. Afar greater and more important difference 
exists in the muscular impressions. The anterior edge of the palleal muscular impression in S. Gladiolus 
is much more curved into the form of a bay and also much more distant from the anterior edge of the shell 
than in S. Siliqua. The S. Gladiolus is never mottled and streaked with reddish purple as is usually the 
-S'. Siliqua. 
Comparative dimensions of the two species. 
Length. Height. 
S. Gladiolus 6 inches. 1 2-1 Oth inch. 
S. Siliqua. 6 4-10th inches. 0 -95 inch. 
A specimen of S. Gladiolus which was in the collection of G. Humphrey was marked “S. America, 
Spengler.” Many were brought to England by the Blossom; and several have lately been brought by the 
Beagle. This species seems to bear the same relation to S. Siliqua, that S. Americanus of Beck does to S. Ensis - 
Solen acutidens, t. 43. /. 2. Broderip and Sowerby, Zool. Jonrn. iv. p. 361. 
From Loo Choo. 
Solen medius, t. 44./. 2. 
Shell obovate, thin, smooth, rounded at both ends ; white with an anterior cross bar inside, and livid 
with a rather thin yellowish brown epidermis outside ; anterior side one fourth the length of the shell. 
Locality unknown. 
Glauconome Chinensis, t. 41. /. 4. Gray, Spicileyia Zool. p. 6. t. 3. /. 13. 
13 a. Sowerby, Genera of Recent and Fossil Shells , No. 42. — Sowerby, 
Concholoyical Manual, p. 46./. 64. 
Inhabits rivers of China. 
Tellinides purpureus, t. 42. /. 2. Broderip and Sowerby, Zool. Journ. iv. 
p. 363. 
Inhabits the sandy shores of the Pacific Ocean. 
Tellina alternidentata, t. 44. /. 5. Broderip and Sowerby, Zool. Journ . 
iv. p. 363. 
Epidermis on the young shell very thin and fugacious : its inside is sometimes of a pale rose colour. 
From the Arctic Ocean. 
Tellina inconspicua, t. 41./. 6. Broderip and Sowerby, Zool. Journ. iv. p. 363. 
Tellina Grsenlandica. Beck. MS. 
From the Arctic Ocean. 
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