LAGENIDAE 167 



Very rare, only one or two specimens at each station, the best at Sts. 386 and WS 204, 

 205. Sidebottom speaks of his variety virgulata as characterized by " four small narrow 

 opaque markings on the test, two on either face.. . .1 think they are sometimes just 

 raised above the surface". He applies the varietal name to both L. laevigata and L. 

 acuta. With one exception (at St. 385) there can be no doubt that in the Discovery 

 specimens the so-called markings are slits in the shell. I cannot say whether they 

 communicate with the interior, but they appear from their position and nature to be 

 homologous with the loops or pockets of L. alveolata, and to indicate relationship to that 

 group. I have therefore raised Sidebottom 's variety to specific rank. 



Sub-family NODOSARIINAE 

 Genus Nodosaria, Lamarck, 18 12 



412. Nodosaria rotundata (Reuss) (F 247) (SG 251). 

 Four stations : 170, 175, i8i;WS482. 



Very good specimens were frequent at St. 175, mostly typical, but one is rather 

 elongate, and approaches Brady's figure of Nodosaria aeqiialis (Reuss) (B. 1884, FC, 

 pi. Ixi, fig. 52), though not sufficiently to be referred to that species. 



N. rotundata is rare at Sts. 170 and 181 , and at St. WS 482 only a single small speci- 

 men was found in 50 m.; this is the shallowest record, the deepest being 342 m. at 

 St. 170. 



413. Nodosaria calomorpha, Reuss (F 252) (SG 254). 

 Eight stations: 203, 363, 385, 386; WS 468, 482, 485, 506. 



Very rare, never more than one or two specimens at each station, and none with more 

 than three chambers. The best specimens were found at the deep-water stations 385, 

 386 in the Drake Strait, and outside or near the Antarctic convergence line. 



414. Nodosaria consobrina, d'Orbigny (SG 255). 

 One station: 386. 



A single small specimen from 4773 m. in the Drake Strait, outside the Antarctic con- 

 vergence line. 



415. Nodosaria communis, d'Orbigny (F 254) (SG 256). 

 Eight stations: 363, 384-6; WS 205, 403, 468, 469. 



Only single specimens except at Sts. 384, 385, 386, WS 403, and the species is rare 

 even at these stations. With the exception of a single specimen at St. 363 in the South 

 Sandwich Islands (329 m.), all the records are from deep water in the Scotia Sea and 

 Drake Strait, 3638-4773 m., and three of the stations are outside the Antarctic con- 

 vergence line. At St. 384 the specimens are weakly marked, approaching a variety larva 

 which I am separating from the type species. 



416. Nodosaria communis var. larva, var.n. (Plate VII, figs. 40, 41). 

 Two stations: 385 ; WS 482. 



