Lampern or river Lamprey, _Petromyzon fluviatilis_. In the River Trent, and also the Tame and in streamlets, Sutton Park, &c. II.--MOLLUSCA. The district around Birmingham is an excellent field for terrestrial and fluviatile Mollusca. Within a circle of twelve miles radius, which includes a portion of the Counties of Warwick, Stafford, and Worcester, can be found fifty per cent. of the species and varieties enumerated in Dr. J. Gwyn Jeffreys’ “British Conchology.” No special quality of soil or geological condition is required for the existence of Molluscs; whatever the nature of the ground may be, some species or other will reward the searcher. The number of terrestrial species is usually the greatest where limestone is present; indeed some species do not seem able to maintain their existence away from it, _e.g._, _Helix ericetorum_, _H. virgata_, _H. arbustorum_, and _Cyclostoma elegans_. The still beautiful grounds of Dudley Castle were once “happy hunting grounds” for the collectors of Mollusca, but the smoke of a thousand fires has cast a baleful influence over the locality. The dead shells of species, once abundant, are conclusive evidence that the Molluscan fauna do not now enjoy a congenial atmosphere in that neighbourhood. _Helix arbustorum_, may, notwithstanding, still be found there, its nearest proximity to Birmingham. Among the noticeable species of the district may be mentioned _Testacella Haliotidea_, found in the garden of a florist at Redditch; _Succinea virescens_, (Morelet) = _S. putris_ var. _vitrea_ (Jeffreys), which the writer has taken near Plants Brook Reservoir; _Zonites glaber_, found near Solihull; _Helix Cantiana_,[62] Henley-in-Arden; _H. virgata_, Grafton, near Alcester; _Balia perversa_, Fenny Compton, Northamptonshire. The three last named species are outside the twelve miles radius. CONCHIFERA. The Midlands are rich in fluviatile forms, nearly all the known British species occur. Those worth noting among the Sphæriidæ are--_Sphærium corneum_, var. _Scaldiana_, Acock’s Green; _S. corneum_, var. _flavescens_, Plants Brook; _S. rivicola_ and _S. ovale_, Acock’s Green and Rushall Canal. _S. lacustre_ is not uncommon, and is found abundantly in a pond at Handsworth. The Pisidia are well represented, four out of our five species occurring. It is curious that the large form _Pisidium amnicum_ has not hitherto been taken in the district. The writer took _P. roseum_[63] from several ponds at Meriden in 1885-6.