254 MESSRS. E. HERON-ALLEN AND A. EARLAND ON THE 



description without amplification, but figures a trigonal test of the group of L. orbignyana 

 (not L. marginata) with sinuous and branching costse. Balkwill and Millett in 1884 

 (B. & M. 1884, PG. p. 32, pi. ii. fig. 13) set the matter right by figuring a specimen 

 similar to Brady's, and describing it as "a variety of L. orbignyana, the surface marked 

 with branching costse." This was followed by Balkwill and Wright, ut supra. 



L. pulchella occurs abundantly in some of the 'Puma' dredgings, although the records 

 are confined to a limited number of Stns. At Stn. 20 it was excessively common. 

 Nearly all the specimens are extremely strongly marked, contrasting markedly with the 

 allied species L. clathrata, which is almost invariably a feeble type in the dredgings. 



200. Lagena pulchella, var. hexagona, var. nov. (Plate 41. fig. 27.) 



1 Station. 



A single sjiecimen from Stn. 20, which we figure. In this very distinctive variety 

 the costse radiating from the oral end of the shell coalesce and form a hexagonal 

 reticulation over the basal half of the faces of the test. 



201. Lagena clathrata, Brady. 



Lagena clathrata, Brady, 1884, PC. p. 485, pi. lx. fig. 4. 



„ Heron- Alleu & Earland, 1913, CI. p. 90, pi. vii. fig. 10. 



9 Stations. 



This species was instituted by Brady (ut supra) for the varieties of L. orbignyana in 

 which the faces are marked with parallel longitudinal costse as contrasted with his 

 earlier species, L. pulchella, in which the costse are sinuous or branching. It is more 

 widely distributed in these dredgings than L. pulchella, but the specimens are fewer 

 in number and almost invariably of a weak hyaline type, with feeble costse seldom 

 extending over the whole face of the shell. It reaches its maximum development, 

 like L. pulchella, at Stn. 20. The species has only been recorded as recent by Balkwill 

 and Millett from Galway (B. & M. 1884, PG. p. 82, pi. ii. fig. 14), and by Wright 

 from Dog's Bay (W. 1900, DBC. p. 54), and ourselves (ut supra), but it has probably 

 been frequently included under L. pulchella, of which there are many British records. 



202. Lagena lacunata, Burrows & Holland. (Plate 41. figs. 28, 29.) (New to 



Britain.) 

 Lagena lacunata, Burrows & Holland in Jones, Parker, & Brady, 1866, etc., MFC. 1895, p. 205, 

 pi. vii. fig. 12. 

 „ orbignyana, var. lacunata, Sidebottom, 1912, etc.,LSP. 1912, p. 416, pi. xix. figs. 16-18. 



2 Stations. 



A few individuals only. The faces of the tests, which we figure, are regularly pitted, 

 but the markings have neither the regularity nor the uniformity of shape characteristic 

 of normal typical specimens. They may be due to algal or fungoid perforations, and 

 the species is therefore recorded with some reservation. 



