

R( ll'l i!i\ 



: oval roundish shape, 8""" Long by a breadth ol 6 and 

 whitish .iiiti yellowish white In a hollow "ii the hindei end "i the mucous gland 

 i) ampulla of the duct of the hermaphrodite gland was lying, 

 when stretched out, length bj a diametei "I up to j '"; on the fore < ml wer< 



ermatic duct forming a little coil; the glans that projected from the penis-bag, 

 long l>> a diametej of 175 Behind the spermatic duct and partis covi 

 . bent double in the middle, .1""" long when stretched out, its duct being 

 ime length. The mucous-alburainiparous gland was whitish and yellowish white. 



I am. Dendronotidae. 

 R Bergh, System d. nudibranchiaten Gasteropoden. [892. p. 1048 1051. 

 The Dendronotidae Form a group, rather well marked off by its peculiar forms; in this respect, 

 however, l>ut still more by the inner structure, and especially by the structure of the pharyngeal bulb, 

 it pi be related to the Aeolidiadae. 



The animals belonging to this group, have hitherto onlj been found in the northern temperate, 

 and especially in the cold si 



The rather strongl) limited family includes only two genera, the real Dendronotus and 



, which latter seemed to l>e distinguished from the former by a simpler structure of the 



frontal appendages, of the rhinophoria, and of the dorsal papillae. It is, however, still to be doubted, 



whether the two generic groups will not prove to be passing into each other, and the examination of 



the following form seems already to imply such a result. 



Dendronotus, Aid. et 1 lane. 



K. Bergh, die Nudibranchien gesammelt wahrend der Fahrten des Wilkin Barents in das nordliche 

 ;eer. 1885. p. 19 .;.:; (Bijdragen tot de Dierkunde. Aflevering XIII. Amsterdam. Onder- 

 jjstochten van de Willem Barents Expeditie. Gedeelte IV (1S861 iSSS). 



A little serii pedes has been referred to this genus, but thi likely to be, for the 



part, reduced to varieties of the typical species. The form examined below, seems, however, 

 istinctly specifically different from the typical one. 



1. D. robustus, Verrill. 

 Vcrrill. Americ Journ. I. 1870. p. 105. Fig. 1. 

 , V. Catal. of marine moll, added to fauna of New Engl Trans. Conn. Ac. V, 2. [882. p. 550. 

 ;. Bidr. til Kundsk om Norges arktdske Fauna I. Moll. reg. arct Norv. 1878. 

 Tab. 28, Fig.2; Tab. XV. Fig. 15. 

 V. R. Bergh, die Opisthobranchien. Rep. on the dredging oper. off the West Coast oi 



tral-Amer. ... by ... Albatross - (Bull, of the Mus. of compar. zool. at Harvard colli 

 XX\ ;. p.141 i.||. Taf.II,Fig.6 9; Taf. Ill, Fig. 1. 



PI. Ill, figs. PL IV, figs. 1 5. 



