568 GASTROPODA. [Opisthobranchia. 



flab. Abundant in Auckland Harbour and elsewhere on the 

 coast (Cheeseman). 



EC marks. The species belongs to the same section of the genus 

 (Doris) as the British D. coccinea, Forbes, to which it comes very near 

 indeed, principally differing in the fewer bipinnate branchiae. (Cheese- 

 man.) 



Genus 3. ALLOIODORIS, Bergh. 1901. 



Alloiodoris, Bergh, Semper's Reise Philip])., .Malac. Unters., vi, 1904, 41, fig. 

 Type : A. marmorata, Bergh. 



Body depressed, the back entirely covered with small tubercles ; 

 tentacles digitiform. Teeth of radula denticulate. The hermaphrodite 

 gland does not form a layer over the Urn- us usual in Dorids, but is a 

 separate mass. Verge terminating in a sharply defined tip. 



No species should be referred to this genus on account of merely 

 external characters. (Eliot.) 



1. Alloiodoris lanuginata, Abraham, 1877. Plate 23, figs. 24. a-d. 



Doris lanuginata, Abrah., P.Z.S., 1877, 205, 255, pi. 29, f. 15-17 ; M.N.Z.M., 

 127. Alloiodoris lanuginata, Abrah. : Eliot, P. Mai. S., vii, 1907, 328, 

 333, pi. 28, f. 1, 2. ? A. marmorata., Bergh, Semper's Reise Philipp., 

 Malac. Unters., vi, 1904, 42 ; Basedow and Hedley, T.R.S. S.Aust., 

 xxix, 1905, 152. 



Body ovate, rather convex ; consistency firm, but soft and fleshy. 

 Mantle large, expanded all round, with a thick, wavy, irregular, crenate 

 border ; it is entirely covered with small tubercles, which extend to the 

 pockets of the rhinophores and branchiae, but are not specially large 

 there. The tubercles are about f mm. high, and stiffened by spicules, 

 4 of which usually project from the tip. The tubercles are not tapering, 

 but either of uniform diameter or larger at the top. Under the micro- 

 scope it can be seen that their sides bear minute projections. They 

 are all whitish, the dark colour of the spots residing entirely in the 

 level dorsal surface. Colour of dorsal surface a dirty red, with nume- 

 rous white tubercles and about 25 scattered brownish spots. There 

 are also a few spots on the under-side of the mantle, near the junction 

 with the foot. Spirit specimens are greyish-brown or greenish-grey 

 with blackish mottlings. The openings of the 'rhinophores form gently 

 swelling hillocks, but are not protected by raised sheaths. The large 

 rhinophores are yellowish with darker mottlings. and bear at least 

 30 deep perfoliations. The branchial pocket has a slightly raised 

 crenulate rim. The branchiae, which are deeply 'retracted (in spirit), 

 are tri- and in places quadri-pinnate. There is 1 separate plume in 

 front, and at the sides two groups of 2 plumes each, so that the branchiae 

 can be counted as 5 or 9 according as these groups are regarded as 2 

 plumes or a bifid plume. They are greenish with darker mottlings. 

 The oral tentacles as preserved are long and flat, furrowed on the upper 

 surface, and almost auriculate. The foot is very large, being* nearly 



