NUDIBRANCHIATE GASTEROPODA. 19 



form as above described, but bad at the base of the book a series of fine denticles (fig. 29). The 

 lateral teeth were upon the whole somewhat more slender (fig. 30). 



Future examinations must decide, whether we have here a new species, or only a variety. 



Nudibranehiata eladohepatiea. 



R. Bergh, System der nudibrancbiaten Gasteropoden. 1892. P- 999 — 1070. 



Fam. Triton iadae. 



R. Bergh, System. 1892. p. 1066 — 1070. 



Among the cladohepatic nudibranehiata this family appears to be the one most closely related 

 to the holohepatic forms; the ramification of the liver otherwise peculiar to the cladobepatic forms, 

 has disappeared, while the Tritoniadae in other respects have retained the essential exterior and inte- 

 rior characters of this group. 



The representatives of this family are already easily distinguished exteriorly by their large 

 frontal veil provided with appendages, and the spoon-shaped tentacles attached to it, further by their 

 peculiar rhinophoria, and the branchial tufts on the dorsal edge. In the interior structure the always 

 colossal bulbils pharyngeus especially shows peculiarities ; the strong mandibles on its fore end are 

 closely resembling those in the Pleurophyllidiae, and like those they are coated with a strong muscu- 

 lar plate on the fore side; the strong radula with many rows and many teeth in the rows has broad, 

 somewhat depressed median teeth with a clumsy denticle on either side of the short and clumsy hook, 

 and the innermost lateral tooth is essentially different from all the others. 



Hitherto the Tritoniadae include only two chief types, the real Tritoniae without, and the 

 Marioniae with masticatory plates in the stomach. 



A sub-group under the Tritoniae is formed by 



Candiella, Gray. 

 R. Bergh, 1. c. 1892. p. 1069. 

 In this form the frontal veil has on the margin rather long fingers (not short papilla;). 

 The hitherto known forms of this group have been of smaller size than the typical Tritoniae; 

 in this respect the form described below, differs from the others. 



Candiella Ingolfiana, Bgh. n. sp. 

 PI. II, figs. 20—22 ; PI. Ill, figs. 4 — 9. 

 On 61 44' Lat. N., 27" 00 Long. W. (station 81) one single specimen was taken at a depth of 

 485 faths. (bottom temp. 6 : T). It was rather well preserved, only somewhat contracted and hardened, 

 and behind 011 the left side was found a rupture with a prolapsus of the entrails. 



The colour of the sole of the foot, the genital papilla, and the region of the mouth was 

 somewhat yellowish; the other parts of the body were grayish blue, but the rhinophoria yellow. The 

 length was 5 cm by a height of up to i - 4 cm , and a breadth of up to r6 cm ; the breadth of the frontal 



