412 



Sir H. H. Hoicorth — The Western Baltic. 



Mytilus eduKs, 

 Modiolaria discors, 

 Cardium cdule. 

 C. exigtium. 

 C. fasciatum. 



Litorina Utorea. 

 Ij. obtusata. 

 L. rudis. 



Lacuna divaricata, 

 L. pallidula. 

 Rissoa octona. 



Lamellibranchiata. 



udsfarte horealis. 

 Tellina halthica. 

 Scrobicularia piperata. 

 arenaria. 



Opisthobranchia. 



Odontostoma rissoides. 



Prosobranchiata. 



Rissoa memhvanaeea. 

 R. cornea. 

 R. parva. 

 Hydrobia ventrosa. 

 Neritina Jluviatilis. 



A much richer fauna occurs on the western seaboard of Mecklen- 

 burg. Thus, Dr. Heinrich Lenz contributed a memoir on the 

 molhisca of the Travemiinde or Lubeck Sound, to the great col- 

 lection of materials published by the Commission of the German 

 Government on the Baltic, from which I take the following list of 

 molluscs (op. cit., iv, p. 170) : — 



Mytilus edulis. 

 Ilodiolaria discors. 

 Montacuta bidentata, 

 Cardium cdule. 

 G. fasciatum. 

 Astarte borealis, 

 A. sulcata. 

 Cyprina islandica. 

 Tellina balthica. 

 Scrobicularia piperata. 

 S. alba. 



Solen 2)ellucidus. 

 Corbula gibba. 

 Mya arenaria. 

 Saxicava rugosa. 

 Pholas Candida. 

 Teredo navalis. 

 ^olis Driimmondi. 

 yE. rufobranchialis. 

 Rolycera ocellata. 

 Doris pilosa. 



Doris proxima. 

 D. muricata. 

 Vtriculus obfusus. 

 U. tnmcatulus. 

 Odosiomia rissoides. 

 Litorina litorca. 

 L. obtusata. 

 L. rudis. 



Lacuna divaricata. 

 L. pallidula. 

 Rissoa inconspicua. 

 R. membranacea. 

 R. octona. 

 Hydrobia nlvm. 

 H. ventrosa. 

 Cerithium reticulatum. 

 Buccinum undatum. 

 I^assa reticulata. 

 Mcsus antiqmis. 

 Neritina fuviatilis. 

 Loligo breviaps. 



Braun makes a general comparison between the marine fauna of 

 Wismar and of the Lubeck inlet, which is interesting as showing 

 how local conditions determine problems of distribution, even under 

 such similar surroundings. Thus, he says, 31 species of marine 

 animals occur at Wismar which are not found in the Lubeck gulf, 

 namely : Podocoryne carnea, Sagttta germanica, all the Eotatoria, 

 Pohjnoe squamata, Valkeria cuscuta, Bias discaudatus and seven other 

 Copepods, Podon minutus, three Ostracods, three forms of Amphi- 

 pods ; and among the molluscs, Cardium exigmim, Odontostoma 

 rissoides, Bissoa cornea and parva; and lastly, Oilioiileura Jlabellum. 

 These are chieflj'^ small pelagic forms, some of which were naturally 

 overlooked by Lenz. 



