314 Transactions. — Zoology. 



donotus giganteus of Kirk) presents peculiarities, indicated by 

 its generic name,* that have hitherto only been noted in two 

 Japanese polynoids, recently described by Mooref as Lepido- 

 notus branchiferus and L. chitoniformis, but which probably 

 should be included in Ehler's new genus just mentioned. A 

 second interesting form is Atagema carinata, which is now 

 r3suscitated from the oblivion that for seventy-five years has 

 sarrounded it. 



I proceed to give a translation of so much of Bergh's article as 

 deals with the external features of our species (omitting details 

 with regard to internal anatomy), and any remarks of my own 

 will be enclosed in square brackets. 



NUDIBRANCHIA KLADOHEPATICA.J 



Fam. TRITONIID^. 



Tritonia, Cuvier. 



T. incerta, Bergh, n. sp., p. 24. 



Of this form I have received from Professor Benham (Otago 

 University) a single specimen, obtained off the east coast of 

 the North Island of New Zealand, between Kaipara and New 

 Plymouth [during the trawling trip of the s.s. " Doto," 1901]. 



[Colour.] The individual, in alcohol, was of a yellowish -white 

 colour. 



[Dimensions. .] The length is 4 cm., with a breadth (without 

 the gills) of 1*5 cm., and a height of 1*3 cm. The breadth of the 

 "buccal veil" is 10mm., its lobes 2 - 5mm., and the tentacles 

 2 mm. The height of the rhinophore-sheath [hinder tentacles] 

 is 4 cm. ; the height of the gills is 4 cm. ; breadth of the sole 

 of the foot, 15 cm. ; length of tail, 3 mm. 



[Externals.] It has the form usual in the genus. The " buc- 

 cal veil " carries altogether seven finger-shaped lobes. The 

 tentacles have the usual form. The retracted rhinophores are 

 3*5 mm. high, with the usual structure. The back is finely 

 tuberculated. The short arborescent gills, numbering 13-14 on 

 each side, are nearly of equal size. The anus is situated below 

 the 5th gill. The genital pore as usual. The foot is narrowed 

 in front and behind ; the margin relatively thin ; the tail [meta- 

 podium] short. 



[p. 25.] Thus form can scarcely be identified with any of 

 the Tritonias from the Pacific, hitherto sufficiently studied ; it 



* Ehlers, " Neuseelandische Anneliden," Abhand. K. G. Wiss. Got- 

 tingen, 1904. 



t Moore, J. P., Proc. Acad. Nat. Sci., Philadelphia, 1903, p. 405. 



I Ncnipcr's '- l;< i,-,- ini !'hili|>pinen,"ix. (Bergh, Malacol. EJnterstich \ i.. 

 1904). 



