52 THE INVERTEBRATE FAUNA 



PlNNOTHERID^C. 



Pinnotheres pisum (Perm.). 



Firth of Forth (M' R). 

 Not uncommon ; we generally found it in 

 the pallial chamber of Modiola modiolus. 

 We have dredged it off Longniddry in 14 

 fathoms, and elsewhere. 



LEUCOSIAD^E. 



balia cranchii (Leach). 



Firth of Forth, rare (H. D. S. .). 



CORYSTID.E. 



Atelecyclus septemdentatus (Mont.). 



Firth of Forth (Ed. Mus) ; Firth of Forth, 

 rare (H. D. S. .); Portobello beach (M'R). 

 The A. heterodon of Leach. This species 

 seems to be a very favourite food of the cod. 

 Dr J. A. Smith has recorded it from the 

 stomach,* and we have found it in the 

 same situation. 



CorysteB cassivelaunus (Penn,). 



Firth of Forth (Ed. MILS.) ; Off Inchkeith 

 (M'R) ; Bass Rock, 24 fathoms (Metzger) ; 

 Aberlady Bay (Com. Mar. Zool.) ; New- 

 haven (C. W. P\ 



Generally distributed; we have dredged 

 it in Aberlady Bay, 5 fathoms, and in 

 Kirkcaldy Bay, 9 fathoms. 



TUN 1C AT A. 



There is practically no literature on the Tunicata of the 

 Firth of Forth. Comparatively few naturalists have worked 

 at this interesting but obscure group, while amateurs, to 

 whom we are so often indebted for valuable contributions to 

 local faunas, invariably fail us when we come to the Ascidians. 



The number of species recorded from the Firth of Forth is 



* Proc. Pby. Soc., vol. iii., p. 214. 



