ELIOT : NUDIBKANCnS OF FALKLAND ISLANDS. 359 



In the central nervous system the pleural ganglia form, a very 

 distinct round swelling at the base of the cerebral. The pleural lie 

 below. The buccal ganglia were not found. The blood-gland is small. 

 Tlie salivary glands of moderate size and band-like. 



The buccal mass is surmounted bj- the sessile ingluvies buccalis, 

 Avliich is divided into two longitudinal halves striped transversely. 

 Tlie labial armature consists of two small yellowish plates, perhaps 

 really united into a ring, formed of short rods or columns with a point 

 at the top, so that when seen from above they appear as disks with 

 a dot in the centre. The radula consists of 33 rows with a maximum 

 formula of 7 . 1 . . 1 . 7. The first lateral (Fig. 8«) is large, of 

 the shape usual in the genus, with a varying number of denticles at 

 the side. Sometimes there are none ; usually 4-5 distinct, with 2-3 

 others less distinct below, occasionally as many as 12. The second 

 lateral (Fig. 8b) has a distinct cusp, and traces of it remain even in 

 th(^ last tooth (Fig. Se). Not more than seven teeth were seen with 

 (crtainty in any row. 



The male genitalia appear to be armed, not with hooks, but with 

 elongate granulate scales, but- the rent in the side has injured these 

 organs so much that it is impossible to say if these scales are really on 

 llu^ vas deferens. The vagina is long and thin, and has an accessory 

 tloeculent gland. The spermatotheca and spcrmatocyst are large, but 

 Ihittened and empty. 



This specimen does not seem referable to any of the species already 

 dc^seribed. The structure of the branchioe is not very plain, but they 

 ai'(^ smaller and simpler than is usual in the genus. The Acanthodoris 

 Vatlieleli of Rochebrune & Mabille (Mission IScientifique du Cap Horn, 

 lS,S2-3, p. 11) may perhaps be this animal, but the description is so 

 slight that it is not even certain that it represents an Acanthodoris. 



Calycidoris, Abraham. 

 I examined the type-specimens of this genus preserved in the British 

 ^Fuseum, under the impression that they probablj^ came from New 

 Zealand or Chile. The habitat is unknown, but the collector had also 

 been in Bering Sti'aits, and the affinities of the form make it possible 

 that it was collected there. I append some notes on it, as Abraham's 

 description is not correct in all respects. 



' Calycidoris Guntheki, Abraham. PI. XXVIII, Fig. 9. 



, Calycidoris Giintheri, Abraham: Ann. Mag. Nat. Hist., vol. xviii, 



; p. 132, pi. vi, figs. 1-lc, 1876. 



Through the kindness of Mr. E. A. Smith I have been allowed to 

 I examine the type-specimens of this interesting form. They are three 

 j in number, and in spite of their age, which must be considerable, well 



B'' preserved externally. The external features are correctly described 

 by Abraham. The foot is triangular, with a fairly broad margin all 

 round. Anteriorly the sole is terminated by a shallow furrow; 

 beyond this is another furrow, and beyond that a fleshy ridge of the 

 same breadth as the foot, with a cleft for the mouth, which is ventral, 



