224 report— -1856. 



The following list of species common to Sitcha and California will have 

 to be considerably extended : — 



Fissurella violacea, aspera. Tritonium scabrum. 



Patella scurra. Petricola cylindracea. 



Littorina modesta and aspera. Lutraria maxima. 



Trochus ater, mcestus, Fokkesii, euryom- 



phalus. 



The following are regarded by Middendorff as peculiar to the Californian 

 province: — 



Chiton Mertensii, scrobiculatus. Crepidula solida. 



Patella aeruginosa. Tellina Bodegensis. 



Natica herculaea. 



The very abnormal appearance of the tropical Litorina aspera and Callo- 

 poma fliictuosum, in these Northern lists, awaits confirmation. The L. aspera 

 of Barclay may be founded on ballast specimens ; or it may be a misnomer for 

 the L.planaxis of Nutt., as ordinary coarse specimens of the two might easily 

 be mistaken. The Callopoma, which appears to extend along the Califor- 

 nian coast, may also have reached Sitcha through human instrumentality. 

 Another circumstance pointed out by Middendorff is remarkable : that two 

 of the largest species of Crepidulce known, are found on the northern shores 

 of America ; one on the Pacific, the other on the Atlantic side. 



45. In the years 1 843-46, H.M.S. Samarang sailed under the command of 

 Capt. Sir E. Belcher to the East Indies. Although the expedition did not 

 touch upon the western coast of America, there appear in the " Zoology : 

 Mollusca, by A. Adams and L. Reeve; London 1850," the two following 

 species : — 



" P. 70. pi. 9. f. 7 a, b. Calyptrcea trigonalis. China Sea." This scarcely differs in 

 any essential particular from Crucibulum lignarium, Brod., and its varieties from 

 South America. The trigonal form may be an accident of growth. 



"P. 78. pi. 21. f. 17. Artemis Dunkeri, Phil. Eastern Seas." This is the abundant 

 and characteristic species of the Mazatlan district, extending along the coast of 

 Peru. The habitat is probably erroneous. 



In all other respects, as might be expected, the species described in this 

 beautiful and most instructive w r ork are entirely distinct from those of the 

 W. American coast. 



46. In the " Zeitschrift fiir Malakozoologie, von Dr. Karl Theodor Menke 

 und Dr. Louis Pfeiffer, Cassel, 1846," pp. 19-21, 51-55, Dr. R. A. Philippi 

 describes the following species from Mazatlan, on the authority of one of his 

 own family : — 



Page. No. 



19 1. Corbula alba, Phil. Resembles the Italian fossil C. carinata. Perhaps 



it is the C. bicarinata, Sow. 

 19 2. Tellina cicercula, Phil. Perhaps= Strigilla camaria, jun. Vide B. M. Maz. 



Cat. p. 41. no. 66. 



19 3. T. lenticula, Phil. (Strigilla). 



20 4. T. dichotoma, Phil. (Strigilla). 



20 5. T. ervilia, Phil. (Strigilla). In his Abbild. &c. Aug. 1 $46, p. 24, he quotes 

 Tellina (Strigilla) pisiformis and Diplodonta semiaspera, as common 

 to Mazatlan and the Caribbean Sea. 



20 6. Diplodonta obliqua, Phil. 



21 7. Lucina cancellaris, Phil. 

 21 8. Patella pediculus, Phil. 



