TEXTULARIIDAE 103 



183. Bolivina cincta, Heron- Allen and Earland (F 154). 

 Three stations: WS 351, 521, 522. 



Rare, but typical and well developed. 



Typical specimens of B. cincta occur frequently in the Challenger material from 

 Challenger St. 300, to the north of Juan Fernandez Island in the Pacific (depth 1375 

 fathoms), so it is evident that the species has a wide distribution. It has some super- 

 ficial resemblance to Bolivina caelata, Cushman (C. 1925, etc., LFR, v, p. 93, pi. xiii, 

 fig. 28), but may be distinguished by its edge, which is broad and flat, whereas the 

 edge of B. caelata is described as acute. No edge view of that species has been figured 

 so far as I know. 



184. Bolivina decussata, Brady (Plate III, figs. 48, 49). 



Bolivina decussata, Brady, 1879, etc., RRC, 1881, p. 58; 18S4, FC, p. 423, pi. liii, figs. 12, 13. 



Bolivina decussata, J. Wright, 1891, SWI, p. 475. 



Bolivina decussata, Cushman, 1910, etc., FNP, 191 1, p. 47, fig. 77; 1918, etc., FAO, 1922, p. 32. 



Two stations: WS 521, 522. 



A single specimen at WS 521 and two at the other station, all quite typical. The 

 records are of great interest as, with a single exception, the species has hitherto only been 

 noted in the Pacific, viz. at Challenger Sts. 300 and 302 (1375 and 1450 fathoms re- 

 spectively) both near Juan Fernandez Island, and at the Albatross St. 4839 ofl^ Japan 

 (140 fathoms). The depth in the case of the Albatross specimens is remarkable as com- 

 pared with the Challenger records and our own, which are from 3780 and 2550 m. 



The only record outside the Pacific, so far , is of material from the south-west of Ireland, 

 (50° 52' N, 1 1 " 27' W) in which the species was noted by Joseph Wright to be " common 

 at 1020 fathoms ". In the absence of a figure it cannot be stated definitely what Wright's 

 form was, and Cushman (1922, ut supra) states that he has found specimens in Wright's 

 material which are evidently those referred to, but differing from the Pacific material 

 he has seen. It is not clear whether he is referring to the Challenger types or to the 

 material from Japan. 



I have not found anything resembling B. decussata in Irish material, though I have 

 dredgings from approximately the same locality as Wright. 



In view of the present extension of the range of the species into the South Atlantic, 

 there seems no inherent impossibility in Wright's record. It may be noted that the 

 species shows a wide range of variation in the Challenger material. 



Sub-family CASSIDULININAE 

 Genus Cassidulina, d'Orbigny, 1826 



185. Cassidulina laevigata, d'Orbigny (F 157). 

 Three stations: WS 428, 521, 523. 



Singularly rare, except at WS 428, where several specimens were observed. 



