Mollusks. 4303 



Mangelia nana, Natica Helicoides, Nucula tenuis, Panopaea Norvegica, 

 Pecten Danicus ? Philine quadrata and scabra, Pilidium fulvum, 

 Puncturella Noachina, Syndosmya intermedia, Thracia convexa, Tri- 

 chotropis borealis, Trochus alabastrum, helicinus, and undulatus, and 

 Velutina flexilis. A considerable portion of our Ascidians belong to 

 this type." Every one of these species has already been found in the 

 Moray Firth, or both to the North and to the South of it in the German 

 Ocean, except Cerithium metula, Emarginula crassa, Hypothyris 

 psittacea, Leda pygmaea, Mangelia nana, Pecten Danicus, Syndosmya 

 intermedia, Thracia convexa, and Trochus undulatus. 



The observations, however, upon which the following list has been 

 drawn up, having been made chiefly on the south-western or Elgin- 

 shire coast, — but a small portion of its lengthened boundaries, — the 

 species here enumerated must not be looked upon as by any means 

 exhausting the Mollusca of the Moray Firth. Additions will no 

 doubt be hereafter made even from within this comparatively narrow 

 corner of its wide waters. Its more northern bays and creeks, and its 

 undredged depths, will afford to future observers much new and inte- 

 resting information, both as to the distribution and economy of its 

 already known denizens, as well as of others not yet detected. 



Still more confined has been the field of observation in reference to 

 the land and fresh- water Mollusca of the Province of Moray. A circle 

 of a few miles around the town of Elgin would nearly comprehend all 

 the ground from which any information has as yet been drawn 

 regarding these tribes. Few additions to the species given are indeed 

 to be expected ; but much has yet to be ascertained regarding their 

 absence or distribution among the lakes and rivers, the woods, 

 the plains, and the hills of this district in the North of Scotland, early 

 known as " The Province of Moray," and which may in general 

 terms be described (Zool. 421) as including the surface drained by the 

 river Spey on the East and by the Beauly on the West, and the broad 

 extent of intervening country rising from the sea level to that of the 

 higher Grampians. 



Acephala tunicata. 



Schlosser's Botryllus, Botryllus Schlosseri. On Flustra foliacea 

 and Alcyonidium gelatinosum, brought up by the fishermen's lines, at 

 Lossiemouth, March, 1853. 



Intestinal Ascidia, Ascidia intestinalis, (Ciona intestinalis, Flem.) 

 This species must be common in the Firth, as appears from the fre- 

 quency with which it is brought ashore in the fishing- boats. 



