128 Mr. L. Reeve on the recent Cranise. 



Patella kermes, Humphreys. 

 Orbicula Norvegica, Lamarck. 

 Crania personata, Lamarck. 

 Crania Norvegica, Sowerby. 

 Criopus anomalus, Fleming. 

 Crania anomala, Loven. 



Hab. North Atlantic, from Spitzbergen to Vigo Bay. 



The typical form of this species is orbicular, slightly trun- 

 cately squared on the posterior side, with the vertex produced 

 into a small and rather sharp hook, a little posterior to central. 

 On a flat surface, undisturbed in growth by any surrounding 

 obstacles, it is of the symmetrical form just described ; but where 

 numerous specimens encumber one another, they become dis- 

 torted, and, if attached in a declivitous position, acquire an 

 abrupt convexity. Professor Suess has observed that Crania 

 anomala ranges along the Atlantic seaboard between Spitzbergen 

 and Vigo Bay, in company always with Terebratulina caput- 

 serpentis, but does not extend its range with that species to 

 North America or to the Mediterranean. 



2. Crania turbinata, Poli, Test. Sicil. vol. ii. p. 189/pl. 30. 



Anomia turbinata, Poli. 

 Crania ringens, Honinghaus. 



Hab. Mediterranean and iEgean Seas (attached to stones and 

 coral, at depths of from 40 to 150 fathoms) : E. Forbes. 



Crania turbinata is a smaller and more conical species than 

 C. anomala, and the internal rostellum is less prominently deve- 

 loped. It is the only species inhabiting the Mediterranean. In 

 the iEgean Sea Professor E. Forbes collected living specimens 

 at depths varying between 40 and 90 fathoms ; and dead speci- 

 mens were brought up with the dredge from the depth of 150 

 fathoms. Poli's Mediterranean Anomia turbinata has been quoted 

 hitherto as a synonym of M tiller's Patella anomala (C anomala, 

 Loven). The researches of recent naturalists on the geogra- 

 phical distribution of the northern species show that it does not 

 extend further south than Vigo Bay. 



3. Crania rostrata, Honinghaus, Monog. p. 3, fig. 3 a, b. 

 Hab. West Africa. 



No fresh observation has been made on this species since the 

 publication, in 1846, of Mr. Sowerby's monograph of the genus. 

 Its habitat, Mr. Cuming informs me, is not the Mediterranean, 

 as given by Mr. Sowerby, but West Africa. 



4. Crania Suessii, mihi, Conch. Icon. pi. 1. fig. 2. 

 Hab. Sydney : Strange. 



Of this interesting Australian Crania Mr. Cuming possesses 



