DOLABRIFERA. 123 



Shell calcareous, white, a little arcuate, wider and flat in front, 

 contracted and callous at the posterior part. 



Oahu, Sandwich Is. ( Voy. Bouite). 



Aplysia oahouensis SOUL., Voy. autour du Monde * * la Bonite, 

 Zool., ii, p. 461, pi. 25, f. 10-13 (1852). 



The description of this form has been overlooked by subsequent 

 writers. Perhaps one or other of Pease's species will prove to be 

 synonymous with it. 



D. OLIVACEA Pease. PL 34, fig. 25. 



Elongate pyriform shape, rounded posteriorly, rugose, and orna- 

 mented with small filaments. Back convexly rounded. Mantle 

 lobes small, rounded and closely enveloping the body, the right over- 

 lapping the left, leaving two small orifices; a groove extends from 

 the mantle lobes along the back and right side of the head to the 

 mouth. Dorsal tentacles grooved laterally and slightly dilating 

 outwards, oral tentacles longer than the dorsal, and curved forwards, 

 grooved and much dilated. Eyes small, black, distinct, sessile in 

 front, laterally to dorsal tentacles. Mouth with a bilobed veil. Foot 

 smooth, shape same as body. Color varies; usually of a dark olive- 

 green, with sap green margins, and varied with whitish and dusky. 

 Filaments pale. Foot pale greenish-slate, dotted with dusky brown 

 and white. (Pease). 



Shell narrow, straight, oblong, radiately depressed in the middle. 

 Margins straight, square; beak produced, trigonal ; apex callous, 

 bilobed. (Sowb.) 



Sandwich Is. (Pse.) 



D. olivacea PSE., P. Z. S., 1860, p. 22. Sows., Conch. Icon..xvi > 

 pi. 1, f. 7. Aplysia (Dolabrifera) olivacea MARTENS & LANGKAVEL, 

 Donum Bismarckianum, p. 54. 



The eggs are deposited under stones, coiled from right to left. 



D. MARMOREA Pease. PL 34, figs. 21, 22. 



Soft parts unknown. Shell short, subquadrate, thickened, straight ; 

 beak rather short, wide, thick, with incurved, callous apex ; basal 

 margin straight ; upper margin excavated ; external and terminal 

 margins a little contracted. (Sowb.) 



Sandwich Is* 



D. marmorea (Pease) SOWB., C. Icon., xvi,f. 5. 



