SUPPLEMENT. 171 



who gave the Mediterranean as well as the Indian Ocean as a 

 habitat. It certainly is not his pectinata. 



. . . . . . " Confusion's cure liyes not 



In these confusions." 



p. 104. MYTILTJS EDTTLIS. Sea of Okhotsk (Middendorff) ; 

 N. Japan (Schrenck). Dr. Edmondston informs me that in 

 the north of Shetland large quantities of the stunted form are 

 scraped off the rocks and " sown " in the voes to produce a 

 crop of mussels of the usual size for fish-bait. 



P. 111. M. MODIOLUS. F. Monte Mario (Rigacci) ! ; Reggio 

 in Sicily (Acton) ! E. N. Japan (Schrenck and Lischke) ! ; 

 Greenland and Spitzbergen (Baer and Middendorff) ; Brittany 

 (Cailliaud and Tasle) ! ; W. coast of JN". America (P. Carpenter). 

 Schrenck has identified this species with Modiola PJiilippina- 

 rum of Hanley, and with Modiola australis of Gray from New 

 Holland. 



P. 116. M. BARBATTJS. The species so named in the ' Fauna 

 Suecica ' is most probably M. modiolus. 



P. 116. M. ADRIATICUS. F. Monte Mario (Rigacci) ! E. 

 Adriatic, 10-30 f. ! M. Cavolini, Scacchi. Yar. ovalis. Brit- 

 tany (Cailliaud and Tasle) ! 



P. 118. M. PHASEOLINUS. F. Norway and Italy ! E. 

 Atlantic coasts of France, Med., and Adr. ! 



P. 122. MODIOLARIA HARMORATA. Of a smaller size, in 

 Diazona Hebridica and other compound Tunicata. F. Monte 

 Mario (Rigacci)! E. Vancouver's I. and W. coast of N. Ame- 

 rica (P. Carpenter). 



P. 125. M. COSTTJLATA. F. Italy. Mr. A. Bell has lately 

 found in the Red Crag a perfect specimen of M. Petagnw, 

 Scacchi ; it inhabits the Bay of Biscay and the Mediterranean. 



P. 126. M. DISCORS. N. of Hebr., 530 f. (C. and T.). 

 F. Scandinavia and Canada. E. Wellington Channel (Bel- 

 cher)!; Canada (Bell). Mr. Barlee's collection contains a 

 specimen | inch in breadth. 



P. 128. M. NIGRA. 



BODY whitish, with a tinge of yellowish-brown : mantle 

 widely open on the anterior side and in front, thickened at the 



