142 REPORT—1843. 
Lamellibranchiata Dimyaria. 
One hundred and fifteen species of this division of bivalve Mollusca were 
observed in the AEgean. Of these ten are undescribed forms, most of which 
are inhabitants of great depths. Twoare species formerly known only in the 
fossil state (Solen tenuis and Neera costellata). Forty-five extend their range 
to the British shores; six do not reach beyond the oceanic coasts of the pe- 
ninsula. Of the more abundant larger forms, the greater part are littoral 
species; among the smaller deep sea forms some, such as Ligula profundis- 
sima and Kellia abyssicola, are very abundant. The majority of species in 
this division inhabit muddy or sandy ground. 
None of the new species found were observed fossil in the neighbouring 
tertiaries. Among the pleiocene fossils were four species, which, though 
three of them are not unfrequent in the western Mediterranean, were not met 
with in the eastern (Isocardia cor, Pholas candidus, Artemis exoleta, and 
Venus casina). It is worthy of remark that these are all existing Celtic 
forms. Neither was Diplodonta apicalis met with alive, which is abundant 
in the tertiaries of the Archipelago, and is an existing inhabitant of the Red 
Sea. There are thirty-seven species inhabiting the coasts of Sicily which 
were not met with in the A2gean; of these twenty-two are oceanic forms. 
Lamellibranchiata Dimyaria. 




Specie, | Ramses | stingae | OF0mE | | Ditton 
fathoms. | fathoms. 
Teredo, sp. .secseeveese| 119 @) V.¥e 
Clavagella, Lam. 
melitensis ? ......64 lit. lit. eale. rock, 1. 
Gastrochena, Speng. 
euneiformis, Lam... 30 O mud, v.r 
Solen, Lin. 
siliqua, Lin. ......++ 1 0 sand. Yr. |Lus., Brit. 
tenuis, Phil. .........) 7-40 7-40 | sandy & nullip.| r- 
coaretatus, Lin.,.,...| 7-50 20 nullipore. f. Iceit., N. 
Solecurtus, De Bl. 
strigillatus, Lin. ... 1 Z-1 sand. I, |Celt, 
Ligula, Mont. 
sicula, Sow. .........| lit. 0 sand. r 
boysii, Mont..........| 4-50 10-45 mud. a {Celt., N. 
prismatica, Mont..,.| 25-55 55 mud. Ea \hlarderie 
*profundissima, Forb.| 72-30 | 80-185 | white mud. | a. 
Mactra, Lin. 
stultorum, Zin....... lit. lit. sand. 1. |Celt., N., Lus. 
Kellia, Turt. 
corbuloides, Phil....| lit. sand. ] 
suborbicularis,Mont.| 29-45 mud. Yr. |Celt., N. 
rubra, Mont.......... lit. rock. 1. IN. & S. Atl 
abyssicola, Forb. ,,.| 70-200 mud. a. 
transversa, Forb. ...| 119 white mud. lv. r. 
Montacuta, Turt. 
BPs Ws cipsgp eye erengs 7 mud. yeI 
Solenomya, Lam. 
mediterranea, Lam. 2 sand. ver, 
Byssomya, Payr. 
8 sand. ver 
guerinii, Payr... ... 
