THr. FAl NA OF I.IVKKPCM IL. 



Family PETEOMYZID.F.. 

 Genus PETROMYZON. 

 Petuumyzon Makincs. The Lamprey. 



Streams between Waniagton and the Mersey. — Mr. N. Cooke. 

 Petromyzon Fluviatilis. Lampem. Eiver Lamprey. 



Eiver Dee, not common. In the Alt, scarce. — Mr. Parke. Mr. Broekholes 

 saw another species in the Alt, (Planeri?) they were gregaiious, twelve or 

 fourteen together in gravelly shoals. 



Sub-Kingdom 2— INVERTEBRATA. 



CLASS MOLLUSCA. 



ACEPHALA TUNICATA. 



Family ASCIDIAD^. 



Genus ASCIDIA. 

 ASCIDIA SORDIDA. 



Now and then found at Hilbre. Taken once or twice in the dredge. The 

 fishermen bring it in rarely. 

 AsciDiA Elliptica. 



I have met with it at Hilbre three or four times, attached to stones. 



ACEPHALA LAMELLIBRANCHIATA. 



Family PHOLADID^.. 

 Gcmm PHOLAS. 

 Pholas Ceispata. 



Abundant at Hilbre Island imbedded in the sandstone rock ; also between 

 Hilbre and Hoylake impacted in clay. 

 Pholas Candida. 



Common, burrowing in peat and clay, from Leasowe towards Hoylake. In 

 clay a little north of Egremont slip. Fonnby shore also. 

 Pholas Papyracea. 



Woodside formerly. Locality now destroyed. — Mr. Marratt. 



Family GASTROCHENID.E. 

 Gemts SAXICAVA. 

 S.\xicava Arctica. 



Hilbre Island. Rare. Dredged young in the Channel, between Dove and 

 Hoyle banks. A little east of Hoylake amongst stones, mud, and sea-weed. 

 Also upon oysters at Hoylalce. 



Family MYAD.E (the Gaper Tril.e.) 

 Gemts MYA. 

 Mya TRl'NC.VrA. 



Found plentifully at low ebb opposite Hoylake, and more sparingly along most 

 of the coast at the north of Wirral and up the Dee. Also dredged, 

 small, occasionally in deeper water. 

 34 



