416 MR. E. A. SMITH ON SHELLS FROM ADEN. [June 16, 



135. CyPR.«A ERYTHR.EENSIS, Bcck. 



136. Cypr^a anntjlus, Linn. 



These are all well-known species, of which the distribution has been 

 given in various monographs. More than half of them have been 

 recorded from the Red Sea, and all are known inhabitants of the 

 Indian Ocean. C cruenta and C. undata are quoted from Aden by 

 Caramagna. 



137. LiTTORiNA glabrata, Philippi. 



Hub, Natal and Amirantes Islands (Brit. Mus.). 



"Payta, Peru," one of the original habitats quoted for this species, 

 is probably one of the numerous errors of locality which occur in 

 Cuming's collection. So far as I am aware it has never been 

 confirmed. 



138. Littorina natalensis, Krauss. 



Hab. Natal and Algoa Bay {Krauss). Ceylon (Brit. Mas.). 



Some specimens from Mergui received from Dr. Anderson and 

 determined by Martens as L. pyramidalis, Qaoy & Gaim., also 

 belong to this species. 



139. Littorina grano-costata, Reeve. 



Hab. Brisbane, Queensland. 



The shells described from Christmas Island under the name of 

 L. granicostata, which I subsequently changed to L. insularis, should, 

 I now believe, be associated with this species. 



The examples from Aden are more finely granose than the typical 

 form. 



140. Planaxis breviculus, Deshayes. 



Hab. Gulf of Akaba and Persian Gulf (Brit. Mus.). Gulf of 

 Suez. 



141. Cerithium (Vertagus) obelisctjs, Bruguiere. 



Hab. Red Sea, Indian Ocean ; China and Tonga Islands (Brit. 

 Mus.), S. Africa and many parts of Indian and Pacific Oceans. 



142. Cerithium (Vertagus) kochi, Philippi. 



Hab. Red Sea, Indian Ocean, Japan. 

 Is this the C. subulatum of Lamarck ? 



143. Cerithium rAppell.!, Phihppi. 

 Hab, Red Sea. Seychelles (Brit. Mus.). 



144. Cerithium c^ruleum, Sowerby. 



Hab. Red Sea, Indian Ocean ; China and Tonga Islands ; Aden 

 (Cooke). 



