SYSTEMATIC ACCOUNT 33 



62. Hormosina ovicula, Brady (A 155). 

 Two stations: 313, 447. 



Rare fragments at each station. None of the specimens can have attained the size of 

 those recorded from shallower water in the Palmer Archipelago (A 155). 



63. Hormosina ovicula var. gracilis, Earland (SG 105) (A 156). 

 One station: 447. 



Many single chambers of this fragile organism were found. 



64. Hormosina lapidigera, Rhumbler (A 157). 

 Two stations: 313, 417. 



Occasional specimens were found in the trawl washings. 



Genus Haplophragmoides, Cushman, 19 10 



65. Haplophragmoides canariensis (d'Orbigny) (F 90) (SG 109) (A 158). 

 One station: 417. 



A few rather small specimens at St. 417, off Coats Land. 

 Pearcey: 337 A "rare". 



66. Haplophragmoides weddellensis, sp.n. (Plate I, figs. 15-16). 

 Thirteen stations: 226, 282, 290, 295, 301, 303, 309, 313, 387, 394, 417, 418, 422. 



Test massive and rough, nautiloid but not quite symmetrical, consisting of two or 

 more convolutions with 5-6 chambers in the last convolution. Umbilical regions more 

 or less depressed, one more so than the other. Constructed of sand grains, very large in 

 proportion to the size of the test, firmly imbedded in ferruginous cement and projecting 

 so as to give a very rough exterior. Aperture small and loop-like on the inner face of 

 the final chamber. 



Greatest breadth up to 2-0 mm. Thickness at final chamber about 1-2 mm. 



Common in the trawl washings from Sts. 313 and 417: more or less rare at the re- 

 maining stations. It would appear that the size of the sand grains employed increases 

 with advancing age ; small and young individuals are less roughly constructed and use a 

 larger proportion of cement. In large specimens the sand grains often project like rocks 

 from the surface. 



Most of the specimens which I succeeded in laying open had a large primordial 

 chamber, but the microspheric form occurs at St. 309 and occasionally elsewhere. It is 

 more neatly constructed and the sunken umbilici expose several convolutions ot small 

 chambers. 



H. zceddellensis belongs to the group of H. canariensis and is most nearly allied to 

 H. crassimargo (Norman). But it differs, not only from that species but from all others of 

 the genus, in its extremely coarse and irregular construction. 



I cannot think how Pearcey can have failed to notice this form which is so abundant 

 in the trawl washings. He describes and figures a new species H. umbilicattim, which 



