188 
Cephalopoda . 
Membrana lingualis elongata, intra fauces recepta; rhachis uni- 
dentata; pleurse uncinis utrinque tribus, recumbentibus, hamatis 1. 
ungvicularibus, simplicibus, interno minore; limbus interdum lamina 
transversa munitus. 
Eledone cirrosa: dens, alternis seriebus diversus, validus, lanceo- 
latus, antice retusus angulis productis hamatis, utrinque uni-1. 
bicuspis, et acie munitus laminari; uncinus internus minutus, 
extrorsum vergens, hamatus, secundus rhachim spectans, robu- 
stus, hamatus, tertius major unguicularis; lamina limbi sub- 
triangularis. 
Sepiola Rondeletii: dens mediocris, simplex, lanceolatus, apicula- 
tus, antice impressus, basi breviter angulata; uncini unguieula- 
res, extrorsum sensim majores, basi antice excavati, et postice 
ala rotundata praediti. 
Loligo vulgaris: dens validus, antice truncatus et angulis exsertus 
mucronatis, recurvis, medio in cuspidem gracilem acuminatam 
simplicem productus; uncini sensim adcrescentes, unguiculati, 
basi inflata, in primo et secundo intus in processum brevem 
deflexum producta; lamina limbi minuta linearis. 
Clio borealis! dens antice convexus, utrinque productus, acie leviter 
biloba, denticulata; uncini utrinque 12 simplices, hamati, scapo 
brevi, sensim minores. 
Hyalaea trispinosa: dens validus latus, antrorsum arcuatus, acie 
cuspide unica valida; uncinus utrinque unicus compressus, ha¬ 
matus, basi constrictus. 
Limacina arctica: dens validus, latus, retrorsum arcuatus, acie 
transversa, unicuspide, utrinque tenuiter peclinata; uncinus utrin¬ 
que unicus hamatus, basi dilatata, postice subalata. 
Doridea. Membrana lingualis lata, plana 1. canaliculata, intra 
fauces recepta; rhachis saepe edentula; uncini jam numerosi, aut 
similes aut dissimiles, ultimis laminaceis, jam duo solum, his eva- 
nidis. Typus armaturae lingualis vagus Bullacea, e. gr. Aceram 
bullatam refert. 
Doris obvelata: dens minutus erectus, basi expansa, capitulo rotun- 
dato, acie decurva, cristato-denticulata; uncini utrinque circ. 20, 
fracto-hamati, margine inferiore serrulati, scapo breviore, jnedia 
serie majores. 
Aegirus punctilucens: dens nullus; uncini circ. 17 simplices cur- 
vato-hamati. 
