LAGENIDAE 147 



difficult to describe, but the illustrations will help. The nature of the basal cusps is 

 doubtful, but in the broken specimen found at St. 386, one is revealed as a hollow cavity 

 not connected with the interior of the test. 



Sidebottom figures some specimens from the south-west Pacific under the name 

 L. clypeato-marginata, Rymer Jones var. crassa, which are nearer L. deaconi than any- 

 thing else I know. They possess cusps, but more inflated than in my species, and the 

 whole test has a wide carina which extends between and beyond the cusps (S. 1912, etc., 

 LSP, 1912, p. 425, pi. xxi, fig. 7). Neither his variety nor my species appears to have any 

 affinity with L. vulgaris var. clypeato-marginata, Rymer Jones (J. 1872, RFL, p. 58, 

 pi. xix, fig. 37). 



The species is named after Mr G. E. R. Deacon, B.Sc, of the Discovery staflF. 



328. Lagena desmophora, Rymer Jones (Plate VI, figs. 44, 45). 



Lagena vulgaris var. desmophora, Rymer Jones, 1872, RFL, p. 54, pi. xix, figs. 23, 24. 



Lagena desmophora, Brady, 1884, FC, p. 468, pi. Iviii, figs. 42-3. 



Lage?ia desmophora, Cushman, 1910, etc., FNP, 1913, p. 27, pi. xii, fig. 5(?); xiii, fig. 3. 



Six stations: 383, 384-6; WS 403, 468. 



Rare everywhere, but excellent specimens at several stations, the best at Sts. 385 and 

 386. They are principally of the form figured by Brady but even more strongly developed. 

 The loops on the ridges become stronger as they approach the base of the shell, and in 

 a few instances form outstanding tubules projecting from the base. 



Rymer Jones gives two figures of his species which are not at first view comparable. 

 Fig. 23 {ut supra) is a simple flask with catenulate ornament only. At St. 384 was found a 

 single specimen almost exactly comparable with Fig. 23. It is a long oval and hyaline 

 flask with sulcate neck and spinous base. The ornament consists of weak costae with 

 a few catenulate pits on them, extending over the basal half of the shell. Fig. 24 has 

 prominent wings but the ornament appears to be similar to fig. 23. Neither of the 

 original figures has much superficial resemblance to the strongly costate forms figured 

 by Brady, but L. torqiiata Brady (No. 408) has characters intermediate between the 

 two extremes. Zoologically, I think L. torqiiata (Plate vi, fig. 43) should be regarded as 

 a synonym of L. desmophora, which species would then include all variations between 

 the thin-walled type of Rymer Jones (Plate vi, fig. 44) and the thick-walled form of 

 Brady (Plate vi, fig. 45). 



I do not think the specimens figured by Cushman in his recently published Tropical 

 Pacific monograph (C. 1932, etc., TPA, 1933, p. 29, pi. vii, figs. 11-14) are properly 

 referable to this species. They appear to represent a variety of L. striato-pimctata, 

 Parker and Jones, and may be compared with Sidebottom's figures of similar varieties 

 of that species (S. 1912, etc., LSP, 1912, pi. xvi, figs. 7, 8). 



329. Lagena distoma, Parker and Jones (F 186) (SG 209). 

 Seven stations: 180, 187, 195, 196; WS 205, 485, 487. 



Very rare, seldom more than a single specimen at each station, and all very small 

 compared with the dimensions often attained in the North Atlantic. 



