457 



Fig. 15. Colpodaspis pusilla, M. Sårs. 



Segmentum unum raclulæ iQO'^^'^ auctum. 



— 16. Colobocephabts costellatus, M. Sårs. 



a. radula superne exhibita, 74'es aucta; b. sectio radulæ, 

 216'es aucta; c. segmentum singulum compressum. 



— 17. Acera bidlata, Miill. 



a tractus intestinalis a latere sinistro exhibitus (o. orifiQium 

 oris; F. pharynx ; m. maxillæ; r. radula; gl. glandulæ sali- 

 vares ; ø. øsophagus; v. ventriculus ; i. intestinum); b. cuti- 

 cula interna pharyngis qum maxillis (m.) et radula (r.) in- 

 ferne exhibita; c. eadem a latere sinistro visa; cl radula 

 superne exhibita, ISies aucta; e. maxillæ expansæ 15'es aucta; 

 /. segmentum unum radulæ, 150ies auctum ; g. uncini 4 externi 

 separati; h. laminæ cartilagineæ ventriculi in situ exhibitæ ; 

 i. laminæ 2 separatæ. 



— 18. Aplysia punctata^ Cuv. 



a. tractus intestinalis superne exhibitus (literæ ut in fig. 

 17 a); b. laminæ nonnuUæ ventriculi separatæ; c. radula 

 superne exhibita et in planum extensa, 4ies aucta; d. seg- 

 mentum unum radulæ, 45ies auctum; e. uncini 5 externi 60'es 

 aucti; /. pharynx a latere dextro exhibitus; g. maxillæ extensæ 

 4ies auctæ. 



Tab. XIII. 

 Pleurobranchiata 



Fig. 1. Pleurobranclms plumida, Mont. 



a. pharynx superne exhibitus 6'es auctus; b. radula et maxillæ 

 superne exhibitæ, IQies auctæ; c. maxilla dextra separata; 

 d. pars maxillæ a facie externa visa, 112ies aucta; e. pars 

 ejusdem a facie interna exhibita; /. sqvamulæ nonnullæ 

 ejusdem 190ies auctæ; g. radula superne exhibita et in pla- 

 num extensa, 15ies aucta; h. segmentum unum radulæ, lOQies 

 auctum; i. pars centralis ejusdem segmenti, l90'es aucta; k. 

 lamellæ duæ medianæ separatæ 780ies auctæ; /. uncini 3 ex 

 media circiter longitudine seriei dextræ, lOOies aucti; m. un- 

 cini 5 externi lateris sinistræ. 



Nudibranchiata. 



Fig. 2. Doris tuberctdata^ Cuv. 



a. pharynx inf erne exhibitus ; b. radula cum cuticula interna 



