244 MESSES. E. HEEON-ALLEN AND A. EAELAND ON THE 



form occurs in which the aperture is broad, furnished with a thickened lip, and but 

 slightly produced, contrasting with the short but stoutly built produced neck of the 

 type. The number of costse vary considerably. At Stn. 20 individuals with few and 

 very weakly developed costs? occur in company with normal specimens. 



158. Lagena liexagOlia (Williamson). 



Entosolenia squamosa, var. hexagona, Williamson, 1818, BSGL. p. 20, pi. ii. fig. 23. 

 Lagena hexagona, Brady, 1881, FC. p. 472, pi. lviii. figs. 32, 33. 



21 Stations. 



Almost universally distributed and common at some Stns., the best at Stns. 10, 18, 

 and 20. There is, as usual, great variation in the size and regularity of marking — very 

 regularly hexagonal specimens at Stn. 10, coarser types at Stns. 2 and 4. Distorted 

 and compressed individuals suggesting the same conditions of growth as have been 

 separated in the allied species L. squamosa under the varietal name montagui (Alcock) 

 occur in considerable numbers at Stns. 11 and 12, where the species is abundant and 

 varied in form, and occasionally at other Stns. 



159. Lagena reticulata (MacGillivray). 



Lagenula reticulata, MacGillivray, 1843, HMAA. p. 38. 

 Lagena reticulata, Reuss, 1882, FFL. p. 333, pi. v. figs. 67, 68. 



4 Stations. 



Scantily represented, the best specimens at Stn. 10. 



160. Lagena squamosa (Montagu). 



Vermiculum squamosum, Montagu, 1803-8, TB. p. 526, pi. xiv. fig. 2. 

 Lagena squamosa, Brady, 1884, FC. p. 471, pi. lviii. figs. 28-31. 



21 Stations. 



Almost universally distributed, common at many Stns., the best at Stns. 7 and 8. 

 There is, of course, great variation in the character and prominence of the markings. 

 At many Stns. the specimens are very weak, but at Stns. 6 and 20 strongly costate 

 forms occur. At Stn. 16 a specimen was found nearly approaching L. melo (d'Orbigny). 

 Abnormal and distorted shells at Stn. 12, and a very curious abnormality at Stn. lU, the 

 oral half of the shell being almost flat with a projecting tubular aperture. 



161. Lagena squamosa, var. montagui (iUcock). 



Entosolenia montagui, Alcock, 1865, NHC. p. 206. 



Lagena squamosa, var. montagui, Wright, 1900, DBC. p. 54, pi. ii. fig. 2. 



„ Heron-Allen & Earland, 1913, CI. p. 76, pi. vii. figs. 11, 12. 



5 Stations. 



Sparingly distributed ; the specimens are, however, quite typical in their absolute 

 dissimilarity from the normal contour of L. squamosa. 



