228 PLEUROBRANCH^EA. 



apart, short and stout, projecting outwards, folded down the outer 

 side, tips obliquely truncate; eyes minute, black, placed within the 

 integument at the inner bases of the tentacles, quite internal, and 

 not to be seen without dissection ; foot long, extremely flexible, sole 

 pale ashy-grey ; branchial plume often over an inch in length, and 

 free for half that distance ; pectinations about 17, finely ciliated; 

 shell none; length 2'5 to 3'25 inches. (Cheesem.). 



New Zealand: Auckland Harbor, in sandy or muddy localities 

 (Cheesem.) ; Port Nicholson (Hutton). 



Pleurobranchcea novce-zealandice CHEESEM., P. Z. S., 1878, p. 276, 

 pi. 15, f. 3 ; Trans. N. Z. Inst., xi, 1879, p. 378, pi. 16, f. 3 (re- 

 printed from P. Z. S.). HUTTON, Man. N. Z. Moll., p. 124. 



Subgenus EUSELENOPS Pilsbry, 1896. 



Neda H. & A. ADAMS, Gen. Rec. Moll., ii, p. 40, type Pleuro- 

 branchus luniceps Cuv. (October, 1854). Not Neda Mulsant, Spec. 

 Col. Trim. Secur., p. 274 (1851), a genus of Coleoptera. 



Animal short, depressed, with very broad sole, slender rostrum, 

 and large, crescentic head-shield with produced angles ; other known 

 characters as in Pleurobranchcea. 



P. LUNICEPS Cuvier. PL 54, figs. 95, 96, 97. 



Body very short, broad and much depressed, the foot extending 

 broadly beyond the mantle on sides and behind. Upper surface 

 pale fleshy purple, sparcely spotted with purple-black angular 

 blotches ; lower surface of head-shield densely mottled with purple, 

 the sole deep purple, lighter forward and toward the median line. 



Tentacles short, truncate, inserted on mantle as in P. meckelii. 

 Veil very broad, crescentic, produced in long processes at the sides 

 Rostrum slender, capable of great extension. Mantle folded into a 

 permanent excurrent siphon behind, as in P. meckelii. Foot broad, 

 emarginate or broadly rounded in front and behind, the sole with a 

 median impressed line. Genitalia unknown. 



Habitat unknown. 



Pleurobranchus luniceps CUVIER, Regne Animal, ii, p. 396, foot- 

 note (name only) ; iv, pi. 11, fig. 2 (1817). BLAINVILLE, Diet. Sci. 

 Nat. xxxxi, p. 371 (1826). ADAMS & REEVE, Zool. Samarang, 

 Moll,, p. 66, pi. 18, f. 6a, b.Neda luniceps Cuv., H. & A. AD., 

 Gen. Rec. Moll., ii, p. 40, pi. 61, f. 1, la (copied from Voy. Samar- 

 ang). 



Cuvier's figure was evidently reversed in engraving, as de Blain- 

 ville has remarked, bringing the gill on the left side. The above 

 description is based on the published figures. 



