F(»i;AMixrFi:i;A iiKitox ali:en and earland. isi 



polished glass Ijottle, with a line white netting lining the inner surface. Covered 

 with closely set incisions disposed in a more or less spiral direction down the 

 shell, each incision lying transversely across one of the meshes of the net. This 

 is probably an optical effect only. Seen under a moderately high power the double 

 wall is seen to consist of irregularly hexagonal chambers, lying between the outer 

 and inner shell-walls, and apparently each chamberlet contains a separate vesicle 

 of extremely delicate membrane. We suppose that the reflection and refraction 

 of the light l)etween these different layers is responsible for the appearance of 

 the incisions, for we have been unal)le to demonstrate any opening in the outer 

 membrane of the wall. 



This is a large and very striking organism, differing entirely from any of 

 the other double-walled Lagenae. Unfortunately only two specimens were found. 



Dimensions: — Length, "SO-^SS mm. ; breadth, •40-'4.5 nnn. 



We have two fossils from Cape Otway (Australia), reported as being Eocene, 

 which probably are referal)le to this species. The mdividuals are smaller than 

 the recent type, and have lost the glassy characteristic of the " Terra Nova " 

 specimens, the surface being dull, but the double wall, the hexagonal mternal 

 mesh, and the delicate transparency of the outer wall remaui obvious. The 

 internal vesicles cannot be demonstrated in these specimens, Init there is some 

 tendency to show tlie "' incision " markings of the decoration. 



316. Liujcua squcuuosa (Montagu). I'l. VI, figs. 1, 2. 



Verinicidum squamosum, Montagu, 1803-8, TB. p. 526, pi. xiv, fig. 2. 

 Latjena squamosa, Cushmaii, 1910, etc., FNP. 191-3, ji. 10. pi. vi, tig. 1. 



Stations 1, 2, 4-6, 8. 11, 16, 19, 27, 38, 48 (+ K. I., K. d. J,). 



The majority of records are from the N.Z. area, where it is common. In 

 addition to the typical form which occurs at Stations 2, 5, 6 and 8, there is a 

 strongly costate thick-shelled form occurring at most of the N.Z. Stations, in 

 which the squamose markings between the costae are variable in position, number 

 and strength ; indeed, the most frequent form in the X.Z. area is a costate Lacjena, 

 which, by the presence of more or less frecpient cross markings between the costae, 

 indicates its close relationship to L. squamosa. Outside the N.Z. area the records 

 are few and the specimens far from satisfactory. At Station 27 they approach 

 L. catenulata, at Station 38 they are typical but weak. At Station 48, however, a 

 single typical individual was found. 



317. Lagena squamoso-sulcata , sp. nov. PI. Y. figs. 15, 19. 



Latjena iiielo (iiitcrincdiati- var.), Brady, Parker and Jones, 1888, AB. p. 2.37. pi. xliv, tig. 25. 



Stations 27, 38, 48, 50. 



Brady, Parker and Jones {uf supra) iigme a specimen which may be described 

 roughly as L. squamosa so far as the oral half of the shell is concerned, and 



