214 Transactions. — Zoology. 



the apex, flatly spreading ; colour dark-purplish, sometimes mingled with 

 greenish-yellow. The branchiae are capable of complete retraction within 

 a common cavity, the edges of which have usually a greenish-yellow tinge. 

 Foot large, with thick and high sides, sole uniform flesh colour. Mouth 

 large, tubular. Oral tentacles unusually long, slender, linear, cylindrical, 

 often protruding beyond the edge of the mantle when the animal is 

 crawling. Odontophore broad, of about 28 rows of teeth. No central 

 teeth, lateral about 60 on each side, smooth, strongly arched, aU similar in 

 shape. 



I have obtained several specimens of this species on rocky ground in 

 Auckland Harbour. 



Doridopsis mamniosa, Abraham, P.Z.S. 1877, p. 266, pi. XXIX., 



figs. 20, 21. 



Mr. Abraham states that this species was collected by the Antarctic 

 Expedition, but its native country appears to be unknown to him. I have 

 no doubt, however, that it is identical with a species found abundantly on 

 Zostera beds from Mongonui to the East Cape, and perhaps further south. 

 The Antarctic Expedition probably obtained it at the Bay of Islands, where 

 it is not uncommon. The following description, drawn up from fresh 

 specimens, will afl'ord some information on certain points, such as colour, 

 etc., which could not be made out from the alcoholic specimens described 

 by Mr. Abraham. 



Body 2-4 inches long, broadly elliptical, back moderately elevated. 

 Mantle large, usually extending on all sides beyond the foot, margins thin 

 and semi-transparent, much undulated. On each side of the back is a row 

 of 3 or 4 large conical or clavate erect processes ; two similar ones are 

 placed close together between the dorsal tentacles. Numerous much 

 smaller tubercles are scattered irregularly over the back and sides. Along 

 the back, between the processes, is a median row of three (rarely two) large 

 lozenge-shaped smooth areas, free from tubercles or projections of any kind. 

 On each side, a similar row of four or five smooth areas extends from the 

 dorsal tentacles to the branchiie, on the outside of the row of processes. 

 These areas are coloured a deep velvety brown-black, and each contains a 

 central spot and a few lateral specks or streaks of an intense greenish-blue, 

 of almost metallic lustre. The remainder of the mantle is a light brown 

 or fawn colour, always marked (especially towards the margins), with 

 numerous delicate whitish or greyish parallel longitudinal lines, which are 

 more or less continuous towards the margins, but are irregular and broken 

 on the back. Dorsal tentacles (rhinophores) rather small, clavate, the 

 upper portion bent and diagonally laminated, tip thickened and rounded ; 

 the whole retractile into cavities that have raised sheath-like edges. Bran- 



