58 PROCEEDINGS OF THE ACADEMY OF [1880. 



ring, as well as in the centre of it around the vent, rather large conical 

 tubercles 1.5 mm. in height; the branchial leaves, fifteen in number, 

 as far as could be determined. 



The oral tube strong, 4.5 mm. long, wide. The bulbus pharyngeus 

 about 5.5 mm. long, by a height of 3.0, and a breadth of 3.75 mm. ; 

 the rasp-sheath about 1.75 mm., freely projecting, bent upwards. The 

 cuticula of the lip-disk yellowish. The tongue with about thirty-five 

 rows of plates (fig. 14-16) ; further backwards, twenty-five developed 

 and four younger rows ; the total number of rows sixty-four On the 

 posterior part of the tongue fourteen plates, the number increasing 

 backwards to fifteen or sixteen. The five anterior rows very incom- 

 plete, only represented by 1, 7, 9, 10, 12 plates (on each side). The 

 plates as above. The breadth of the rhachis reaching to about 0.17 mm. 

 The glandulae salivales 6.0 mm. long. ^The stomach (fig. 17o) about 

 4.0 mm. long. The contents of the digestive cavity a mass of sponge. 

 The vesica fellea (fig. 17c) about 2.5 mm. high, with strong folds on 

 the inside. The anterior genital mass quite as above, also the sper- 

 matotheca and the spermatocysta (fig. 19j, the penis (fig. 18, 20), and 

 the vagina (fig. 18, 19). 



LAMELLIDORIS, Alder et Hancock. 



Lamellidoris, A. et H., Monogr. Brit. Nudibi". Moll., Part VII, 1855, p. xvii. 

 Lamellidoris, A. et H., R. Bei-gh, Malacolog. Untersuch. (Semper, Philipp. 



II, ii). Heft xiv, 1878, p. 603-615. 

 Lamellidoris, A. et H., R. Bergh, Gatt. nord. Doriden, 1. c, 1879, p. 



362-365. 



Corpus vix depressum, nothoeo granulate. Branchia (non retracti- 

 lis) e foliis (multis) simplicita pinnatis, ut plurimura in formam ferri 

 equini dispositis, formata. Caput latum, semilunare, angulis tentacu- 

 laribus. Aperturte rhinophoriales, margine integro ; tuberculis anticis 

 2-3, calvitie postica. 



Cuticula apertura? oralis infra asserculis duobus incrassata, et ante 

 annulus papillarum angustus. Lingua rhachide lamellis humilibus in- 

 structa ; pleuris dente interno hamiforrai permaguo et externo com- 

 presso lamelliformi unco minuto pra^dito armatis. Ingluvies buccalis 

 (suctoria) petiolo bulbo pharyngeo connata, tympaniformis. 



Penis apice (glaude) curvatus, non armatus. Vagina brevis. 



The genus Lamellidoris was established (1855) by Alder and Han- 

 cock, to receive two small groups of Dorididee., one with the D. hilam- 

 ellata as type, to which especially the name of the group is here 



