ELIOT : HUDIBRANCHS OF NEW ZEALAND. 341 



that E. pulchra loses its scarlet in alcohol, but though it is nearly 

 allied to this species the two are probably distinct specifically. 

 Among other points of difference it has only 8-11 denticles on the 

 first lateral tooth, whereas li. muscula has about 30. R. muscula 

 appears to have no regular labial armature, but it is possible that the 

 cuticle has decayed and the plate become decomposed. 



Gaegamella Novozealandica, n.sp. 

 (Cf. Bergh on G. immaculata : Bull, Mus. Comp. Zoology, Harvard, 

 p. 175, 1894.) 



One small specimen, about 16 mm. long and 7 broad, marked 

 " Auckland Harbour." The dorsal surface is bluish grey and covered 

 with minute, elongate, soft tubercles, the texture being villous rather 

 than warty or granulate. Under the microscope a minute brown 

 reticulation can be seen between the tubercles. The rhinophore 

 openings lie in little hillocks, but are not protected by sheaths. The 

 1 branchiae are 10 in number, compressed, and pyramidal in shape. 

 j They seem to be pinnate and in places bipinnate. The margin of the 

 branchial pocket is not raised.- The integuments and especially the 

 tubercles are full of spicula, straight or slightly undulated, with 

 a granulated surface. They project from the tips of the tubercles. 

 The oral tentacles are small, linear, but distinct. The anterior margin 

 of the loot is deeply grooved and expanded into ample flaps, as in 

 Kentrodoris. 



The central nervous system is rather large and dark in colour, 

 especially the large common commissure, which is dark brown. The 

 cerebro-pleural ganglia are united in a large pear-shaped mass in 

 which two divisions can be distinguished. The pedal ganglia are 

 separate, round, and dark brown. Dark pigment was found on the 

 , labial cuticle, but no armature. The radula is small, the maximum 

 formula being 18 X 20 . . 20, and most of the rows are smaller. 

 The teeth are simply hamate with long bases. The innermost are low 

 and have on the inner side a slight projection hardly amounting to 

 a denticle. The teeth increase in size up to the middle of the row, 

 „ and the two or three outermost are small and thin. 



The genitalia are small and hardened, but it was ascertained that 

 what seems to be the vas deferens was armed with transparent disks 

 with central spots and spines exactly like those of G. immaculata 

 figured by Bergh (I.e., pi. vi, figs. 14, 15). 



The specimen is probably immature, but seems referable to Gargamella, 

 which is distinguished from Thordisa only by possessing an armature 

 on the genitalia, and is perhaps merely a subgenus. This species is, 

 however, distinct from G. immaculata, Bergh (from Cape Delgada '), 

 and differs in colour as well as in the radula and branchiae. 



Aphelodokis, Bergh. 

 \ This genus was created by Bergh in 1879 for Aphelodoris antiUensis 

 sfrom the West Indies. The shape is as in Chromodoris, the back 



t ~ — — — ~ 



t 1 On the Atlantic coast of Patagonia (Argentine EepubHc), 42° 25' S., 61° 38' W. 



VOL. VXI. — SBPTEMBER, 1907. 24 



