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ME. W. K. PAEKEE AND PEOFESSOE T. E. JONES ON SOME 
what trumpet-shaped, and of varying length (as may be seen in figs. 42 & 43). Fig. 
44 has the tube partly protruded, and partly internal. The apparent difference in the 
setting on of the mouth, which we formerly thought we could detect, between Entoso- 
lenia and Lagena proper (Annals Nat. Hist. 2 ser. vol. xix. p. 279), does not really exist, 
for we find that in any of the subspecific groups forms may occur having either a gently 
tapering neck (Ectosolenian), or a tube abruptly set in (Ento-ecto-solenian), or a mouth- 
tube entirely intussuscepted (Entosolenian). L. marginata is sometimes distomatous, 
being open at the base, and then coming under another (artificial) subdivision. 
Between such globose forms as figs. 38 & 39, and the flattened ones (figs. 42-44), 
there is an almost infinite number of gentle gradations shown in specimens from all 
parts of the world. 
The specimens figs. 42-44 occur at the Hunde Islands (Dr. Sutherland), in three 
dredgings at from 30 to 70 fathoms, and at Drontheim, North Cape (MacAndrew and 
Barrett), from 30 to 200 fathoms. Rather common. Professor Williamson has already 
recorded the occurrence of L. marginata at 100 fathoms at the Hunde Islands (Monogr. 
pp. 10 & 11). Like other Lagence , it is world-wide ; and is abundant in the Tertiaries : 
it is rather common, for instance, in the Crag of Suffolk. For some of its Mediterranean 
habitats (recent and fossil) see Quart. Journ. Geol. Soc. vol. xvi. p. 302, Table. Under 
the name of Oolina compressa , D’Orbigny described it as occurring with other Lagence at 
the Falkland Isles. It is figured by J. D. Macdonald, Assist.-Surgeon H. M. S. Herald, 
in the Annals Nat. Hist. 2 ser. vol. xx. pi. 5. figs. 7-10, but not described. He found it, 
together with a dimorphous TJvigerina (with loosely set, straggling chambers), Spirolo- 
culina planulata , Quinqueloculina Seminulum, and Triloculina oblonga in 440 fathoms 
water between Ngau and Viti-Laru, in the Feejee group of islands. 
L. marginata is sometimes hexagonally areolated, like L. squamosa , but more feebly 
( L . squamoso-marginata, Parker and Jones, Plate XVIII. fig. 2) ; as we have seen in 
specimens from the Tertiary beds of San Domingo, and from the white mud of the 
Australian Coral-reefs. 
Plate XVI. figs. 12 a, 12 b (North Atlantic). 
Here we have a slight modification in the development of the keel, as compared with 
the equivalent specimens represented by figs. 42, 43, Plate XIII. In the North Atlantic 
L. marginata is rare and small at 740 fathoms; rare and middle-sized at 1450 fathoms; 
rather common and large at 2350 fathoms; rare and large at 415 fathoms; rather common 
and small at 90 fathoms; and common and small at 78 and 43 fathoms. Dr. Wallich 
figures three forms of L. marginata , ‘ North- Atlantic Sea-bed,’ pi. 5. figs. 19, 20, 22. 
Lagena sulcata , Walker and Jacob, Var. distoma , nov. Plate XIII. fig. 20 (Arctic). 
Fig. 20 represents a long, costulated, fusiform Lagena , open at both ends, with one 
extremity rather more tapering than the other. This variety of Lagena has not been 
previously named. It was figured and described by us in the ‘ Annals Nat. Hist.’ ser. 2. 
xix. p. 279, pi. 11. f. 24. See also Trans. Linn. Soc. xxiv. p. 467, pi. 48, f. 6, Brady. 
