Revision of the Genus Lomanotus. 207 



relied on. The following survey of the history of Lomanotus 

 will serve to illustrate these points, and will also, it is hoped, 

 furnish material for estimating the value of the revision of 

 the genus which it is the main object of this paper to propose. 

 In any case, this historical sketch can hardly fail to be useful 

 to students of Lomanotus, as giving them a rather full resume 

 of the scattered and by no means easily accessible literature 

 on the subject. 



1844. — Giovanni Battista Verany, of Genoa, describes 

 in the August issue of the ' Revue Zoologique par la Socie'te" 

 Cuvierienne ' (tome vii. p. 303) a new genus of Nudibranch 

 Mollusca to which he gives the name Lomanotus. The 

 generic characters here published by Verany are as follows : — 



" Corps allonge, cuneiforme, gasteropode; tete aussi large 

 que le corps, munie d'un voile frontal portant de chaque cote 

 de petits prolongements tentaculiformes ; deux tentacles 

 dorsaux, retractiles, termines en massue comme dans le Doris 

 et loges chacun dans une espece d'etui caliciforme ; organes 

 de la respiration forme's par deux membranes minces et 

 frangees, fixees de chaque c6te* entre la face dorsale de 

 l'animal et les faces laterales ; orifices de Fanus et des organes 

 genitaux comme dans les Tritonies" 



In the month following this first publication of Lomanotus 

 VeVany introduces the new genus to the special notice of 

 Italian zoologists in a paper on the Nudibranchs of Liguoria 

 read by him at the Sixth Congress of Italian Scientists held 

 at Milan. In the report of this Congress, published in Italian 

 at Milan in 1845 (' Atti della Sesta Kiunione degli Scienziati 

 Italiani tenuta in Milano nel Settembre del 1844 '), an abstract 

 is given of Verany's description of the new mollusc as read 

 before the Congress. Here the original French description 

 of the genus is improved on, notably as regards the branchial 

 processes (the pallial curtain, epipodial ridge, or pleuro- 

 podium, as it has been variously termed). The branchiae are 

 here said to be in the form of a fringe irregularly festooned 

 and toothed, attached longitudinally to the sides of the body 

 and to the sheaths or calyces (" con le brancliie a frange 

 irregolarmente festonate e dentate attacate longitudinalmente 

 ai lati del corpo ed ai calici"). The abstract concludes with 

 the statement that the species is dedicated to Prof. Gene 

 (" La specie e dedicata al Prof. Gene "). Verany at the 

 meeting of the Congress in 1844 evidently described the 

 species no less than the genus, and he clearly intended that 

 the species should bear Gene's name. As he did not, how- 

 ever, assign to the species, either at the Congress or in the 



