•J46 MESSES. E. HERON-ALLEN AND A. EARLAND ON THE 



by Williamson (fig. 9) occur at Stn. 22 (a shore-sand). At Stu. 11 distorted individuals 

 of the curved type occur. 



166. Lagena semilmeata, Wright. (Plate 41. figs. 21, 22.) 



Lagena semilineata, Wright, 1885-6, BLP. p. 320, pi. xxvi. tig. 7. 



2 Stations. 



One weak specimen at Stn. 18 and a remarkably fine and typical example at Stn. 9, 

 which we figure. The markings are gouged-out grooves, a feature which separates it 

 from L. semistriata, under which name it may have been recorded elsewhere. This 

 type is extremely rare, whereas L. semistriata is everywbere a common species. 



167. Lagena perlucida (Montagu). 



Lagena vulgaris, var. perlucida, Williamson, 1858, RFGB. p. 5, pi. i. figs. 7, 8. 



„ perlucida, Heron-Allen & Earland, 1908, etc., SB. 1911, p. 320, pi. x. fig. 13. 



4 Stations. 



Feebly represented, only an occasional specimen, tbe best at Stn. 4. 



168. Lagena striata (d'Orbigny). 



Oolina striata, d'Orbigny, 1839, FAM. p. 21, pi. v. fig. 12. 



Lagena striata Brady, 1884, PC. p. 460, pi. lvii. figs. 22, 24, 28, 29. 



15 Stations. 



Generally distributed, but not abundant except at Stns. 4 and 18. There are two 

 very distinctly recognizable types — one in winch tbe flask is very swollen and rotund 

 and the otber in which it is long, with more or less parallel sides. The two occur 

 together at Stn. 4 and at one or two others, but, as a rule, the narrow form predominates. 

 At Stn. 4 a specimen of the rotund type with a hispid base occurred. At this Stn. and 

 also at Stn. 19 specimens were found in which there was a change in the diameter of 

 the shell at about mid-growth. 



169. Lagena sulcata (Walker & Jacob). 



Serpula {Lagena) striata sulcata rotunda, Walker &; Boys, 1784, TMR. p. 2, pi. i. fig. 6. 

 Lagena sulcata, Brady, 1884, FC. p. 462, pi. lvii. figs. 23, 26, 33, 34, pi. lviii. figs. 4, 17, 18. 



20 Stations. 



Almost universally distributed and often very common, the best at Stn. 7. Very 

 variable both as to size and pi*ominence and regularity of markings. The var. interrupt a 

 of Williamson occurs at many Stns. (W. 1848, BSGL. p. 14, pi. i. fig. 7), principally in 

 the shallower dredgings and shore-sands. At Stn. 2 a distorted specimen, with the neck 

 set almost at right angles to tbe body and with curved costae suggesting L. curoilineata, 

 Balkwill & Wright, was found ; a somewhat similar specimen was found at Stn 10. 

 At Stn. 19 a specimen in which the costse formed hexagonal reticulations over tbe base. 

 At Stn. 20 (and some others) a very small but strongly marked type occurs, with an 

 almost globular body and. costue extending in sharp edges, and then coalescing into a 

 produced ornamental neck. 



