348 PROCEEDINGS OF THE ACADEMY OF [1895. 



Corpus oblongum, antiee quasi 4 auriculis acutis instructum. 

 " leporina. 2. T. corpore rubro, margine membranaceo, auriculis 

 duobus. 



[a] Bund. pise. 1. p. 520. Lepus mariuus. 



[b] Bell, aquat. 437. Lepus mariuus. 



[c] Gesn. aquat. 475. Lepus mariuus. Aldr. exsangu. 78. 

 Lepus mariuus 1. 



Habitat in M. Mediterraneo. 



Conf. Column, aqu. t. 26, f. 2, 3." 



It will be noticed that the above description of limadna contains 

 nothing diagnostic of a species, though the genus is clearly indicated. 

 As Linne gives us no reference to earlier writers, we have absolutely 

 no means of learning what Teihys limaciria is, and the name must be 

 dropped. 



In the case of leporina, Linne gives ample references to the 

 sources whence his information was derived. These we analyze as 

 follows: [a] Gulielmi Rondeletii, etc., Libri de Piscibus Marinis, 

 etc. (1554), Liber xvii. p. 520, figures an Aplysia which seems to be 

 the A. fasciata of authors (for it lacks the conspicuous shell-foramen 

 of depilans, and the broadly united parapodia of punctata), [b] La 

 Nature & diversity des poissons, avec leurs pourtraicts, represented 

 au plus pres du naturel, par Pierre Belon du Mans (Paris, 1555), 

 p. 437, seems to be an undeterminable species of " Lievre Marin" 

 from the Cyclades, known to Belon through the ancient authors only, 

 [c] Conradi Gesneri medici Tigurini Historic Animalium, Liber 

 III I. qui est de Piscium & Aquatilium Animantium natura (1558), 

 p. 561 (Linne wrongly gives 475 as the page). A reversed copy of 

 Rondelet's figure is given, Gesner's information being wholly second 

 hand, [d] Ulyssis Aldrovandi etc., De Reliquis Animalibus exan- 

 guibus, libri quatuor, post mortem eius editi Nempe De Mollibus, 

 Crustaceis Testaceis, et Zoophytis (1606), De Mollibus, liber I, p. 

 78. In this work, which is purely a compilation, all of Rondelet's 

 figures again do service, and Linnaeus' reference will naturally be 

 confined to the first of these. Aldrovandus also figures (p. 82) a 

 couple of species of Doris as " Lepori? marini alia species," and (p. 

 83) two other figures possibly representing Aclesia. Linne's " conf. 

 Columna " refers us to figures of the Nudibranch commonly known 

 as Tethys fimbria; but this figure is merely cited for comparison, 

 not as a representation of the species T. leporina. 



