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



253. Lagena Isevis, var. setigera Millett. 



Lagena clavata, var. setigera Millett, 1898, etc., FM. 1901, p. 491, pi. viii. fig. 9. 



1 Station. 



A number of specimens at Stn. 7 which we have no hesitation in associating with 

 Millett's variety, although the basal processes are extremely short as compared 

 with his figure. In Millett's specimens the base is described as a " cup-shaped 

 indentation surrounded by a circle of setse " [bridles) ; in the Kerimba specimens the 

 indentation, when present, is very small, the base being usually merely truncate ; there 

 is no sign of any perforation in the base, and we therefore think that our specimens 

 are more nearly allied to L. Icevis than to L. clavata. 



254. Lagena crenata Parker & Jones. 



Lagena crenata Parker & Jones, 1865, NAAF. p. 420, pi. xviii. fig. 4. 

 Brady, 188J, FC. p. 467, pi. Ivil. figs. 15, 21. 

 BalkwiU & Wright, 1885, DIS. p. 339, pl. xiv. fi-s. 17, 18. 

 Millett, 1898, etc., FM. 190], p. 485, pl. viii. fig. 1. 



6 Stations. 



Sparsely distributed, but never abundant. Very variable in contour and presenting 

 many passage-forms linking it with L. semistriata. Two types are usually present, 

 one in which the body slopes gradually into the long neck forming an acute triangle 

 in section, and another in which the body is turgid and the neck produced from it, 

 x\t Stn. 3 both these forms occur together, and abnormal specimens also, in which the 

 body is very lengthened and narrow. At Stn. 7 the individuals were all large but 

 weakly crenelated. The spiral neck-ornament, which is usually present in typical 

 specimens, is absent or weakly developed in nearly all cases. The absence of this 

 feature may, as Millett suggests, raark the close affinity of the Kerimba specimens 

 to L. semistriata, although we have specimens of L. semistriata from the Philippine 

 Islands in which the neck is ornamented with a prominent spiral carina more strongly 

 developed than we have ever observed in L. crenata. These Philippine specimens, 

 however, are unquestionably abnormal. 



255. Lagena semistriata Williamson. 



Lagena striata, var. semistriata Williamson, 1818, BSGL. p. 14, pl. i. figs. 9, 10. 

 Lagena sulcata, var. semistriata Parker Ss Jones, 1865, NAAP. p. 350,. pl. xiii. tig. 23. 

 Lagena semistriata Joius, Parker, & Brady, 1866, etc., MFC. 1863, p. 34, pl. iv. fig. 6. 



Brady, 1884, FC. p. 465, pl. Ivii. figs. 14, 16, 17 (? 18, 20). 



E-ge"r, 1893, FG. p. 327, pl. x. figs. 34, 39. 



Millett, 1898, ctL-., FM. 1901, p. 486, pl. viii. figs. (?) 2, 3. 



4 Stations. 



Very rare and always weakly developed, the best specimens being from Stn. 9, but 

 only one or two of them were at all typically marked. 



