Vi THE NAUTILUS. 
$1.00 Offer No. 7. Tand Shells. 
Sent postpaid on receipt of price. 15 species, 30 specimens in 
each offer. Those marked (**) will be duplicates. 
116 Helix cyzicensis Galland. Balearic Isles. 
** 117 Helix apicina Lam. Balearic Isles. 
* 118 Helix carthusiana Mill. Italy. 
* 119 Helix cireumfermata Red. Germany. 
* 120 Helix arbustorum Mull. Switzerland. 
* 121 Helix aspersa Mull. England. 
** 122 Helix unidentata Chem. Seychelles. 
* 123 Helix rotundata Mull. Belgium. 
124 Helix rareguttata Mouss. Philippines. 
* 125 Cyclostoma Mauritianus Adams. Mauritius. 
* 126 Partula gibba Fer. Marian Islands. 
* 127 Achatinella vulpina Fer. Hawaii. 
128 Bulimus fulguratus Jay. Fejee Islands. 
129 Macrocerramus teniuplicatus Pfr. San Domingo. — 
150  Cochlostyla lais Pfr. Tukan Bessi Island. 
$1.00 Offer No. 8. Marine Shells. 
131 Strombus dentatus L. Philippines. 
* 132 Neritina pupa L. Cuba. 
133 Cerithium columna Sby. Mauritius. 
* 154 Potamides rhyzoporarum A. Ad. Borneo. 
* 135 Littorina scabra L. West Indies. 
* 136 Columbella nitida Lam. West Indies. 
* 137 Nassa vibex Say. Santa Barbara, Cal. 
* 138 Melampus olivaceus Cpr. Santa Barbara, Cal. 
* 139 Cypreea pediculus L. West Indies. 
140 Psammicola togata Desh. Philippines. 
141 Heterodonax bimaculatus D’Orb. Long Beach, Cal. 
142. Donax vittatus Da Costa. France. 
148 Donax denticulatus L. Jamaica. 
144 Circe minima Mtg. Mahon. 
** 145 Mesodesma cornea Desh. Mahon. 
The two Offers and Nautilus for one year for $2.50. 
Address, W. D. AVERELL, 
Mt. Airy, Philadelphia, Pa. 
