370 WATSON : MARINE MOLLUSCA OF MADEIRA. 



case for Madeira, where C. discrepans Brown is frequent, as 

 McAndrew found his species to be, but where C. fascicularis L. 

 is unknown. The Madeiran species in the British Museum, 

 and the specimens from Canary at Cambridge, both marked as 

 C. fascicularis, are discrepans. 



Bulla ampulla. — No Madeiran specimens exist at Cam- 

 bridge, but in the British Museum there is a card marked 

 'B. amptdla, Canary,' to which are attached some young Bullas 

 in bad condition, and one bit of a full-grown shell, which last, 

 though the locality is discordant, is no doubt the identical 

 'fragment' mentioned at p. 41 of Mc Andrew's list as got at 

 Madeira. All these specimens are B. punctata A. Ad. (Sow., 

 Thes. Conch., II, 557, sp. 53, cxxiii., 77), [the nomenclature of 

 which I reserve for further discussion], a species unquestionably 

 different, but so far similar in colour as to make mere fragments 

 difficult of identification. 



Pecten niaximus McAndrew marks as 'rare, young.' No 

 specimens of this species from Madeira exist either in the 

 British Museum or at Cambridge ; and the solitary specimen 

 from Canary thus marked by McAndrew is P. jacobceus L, 



Pecten opercularis. — 'One minute specimen' is the entry 

 against this for Madeira, and 'one small specimen' for the 

 Canaries; and in his 'Geog. Distrib.,' p. 29 and p. 42, he adds 

 a query to both of these identifications. From Madeira no 

 specimen of this species is to be found either in the British 

 Museum or at Cambridge, but from the Canaries a single very 

 young specimen of McAndrew's exists in the British Museum — 

 it is marked P. opercularis, but is P. gibbus = commutatus 

 Montero. 



Deducting these five species, 119 are left; but of these 

 four species, though possible, are very doubtful inhabitants of 

 Madeira, having rewarded no other collector. 



Porotnya granulata. — The solitary valve of this species 

 which McAndrew mentions in his list exists neither in his own 

 collection at Cambridge nor among his gifts to the British 



J.C, vi,, July, 189J. 



