136 REPORT—1843. 
Gasteropoda Pulmonifera. 
A single marine species of this order, Auricula myosotis of Draparnaud, is 
found under stones in muddy places on the shores of several of the Cyclades, 
and also, though local, on the coast of Asia Minor. It ranges to the shores 
of Britain. 
Gasteropoda Pectinibranchiata. 
One hundred and ninety species inhabit the gean. Of these ninety-eight 
are Holostomatous univalves, eighty-two Siphonostomatous, and ten Convo- 
lute. There are among them thirty-four new species, one-half of which in- 
habit great depths. More than two-thirds of the Holostomata do not range 
beyond fifty fathoms in depth, whilst of the Siphonostomatous and Convo- 
luted univalves more than half the species exceed that limit. Of the first 
division, twenty-two species extend their range to the British shores, ten of 
the second, and two of the third. Eight species of pectinibranchiate univalves 
now living in the Egean have hitherto been observed only in a fossil state. 
Two of them, viz. Fusus crispus and Buccinum semistriatum, have long been 
regarded as characteristic shells of certain tertiary formations. 
Of species recorded as inhabitants of the western Mediterranean which 
were not met with in the eastern, there are twenty-four Holostomata, twenty 
Siphonostomata, and nine Convolute. 
Nearly a third of the following one hundred and ninety Pectinibranchiata 
are found fossil in the pliocene deposits of the Archipelago, mingled with 
species of a more southern character, some of which, as Terebra duplicata 
and Phorus agglutinans, ave existing inhabitants of the Red Sea. In the 
corresponding tertiaries of Sicily, Atlantic species occur of which there are 
no traces either recent or fossil in the Egean. These facts would seem to in- 
dicate the connexion of a Mediterranean basin on the one hand with the 
Indian Ocean by the Red Sea, and on the other with the Celtic Seas during 
the last tertiary period. ; 





Pectinibranchiata. 
. Found a eographi 
Species. Range. scaalek Ground. = ieee 
Coriocella, Blainv. fathoms. | fathoms. 
perspicua, Gmmel. .. 69 OF hs Geeta V. I. Lus., Celt. 
Natica, Brug. 
millepunctata, Zam.| 10-70 0 weely. 1. |Lus. 
valenciensii, Payr. .| 10-60 10 weedy. l. 
pulchella, Risso.. ... 2-80 | 20-45 |weedy,nullipore} f. 
guilleminii, Payr...| 13-20 a poe Se ceeee r. 
olla, M. de Serres..| 4-10 4-7 sand. ] 
Eulima, Risso. 
polita, Mont....... .. ee Ne | 4a 5 ata sand. f. |Lus., Celt., N. 
distorta, Desh. 69-140 | ...... weedy. l. \Can. 
nitida, Lam..........| 25-41 | 41 weedy, nullipore, 1. 
subulata, Don......| 7-140 29 weedy. - |Celt., N. 
unifasciata, Ford. ...| 69 L seneate nullipore. |v. r. 
Parthenia, Lowe. 
acicula, Phil......... 10-41 30 weedy. l. | 

pallida, Phil.......... 41 OSA ae Oe ar 98s v. I. 
