113 DISCOVERY REPORTS 



Straight form of Seguenza and a curved variety which is well ilkistrated by Brady 

 (B. 1884, FC, pi. Ivi, fig. 24). The two forms occur together at Sts. 42 and 144, the 

 curved variety only at St. 45, WS 33, 42, 50 and 154, and only the typical straight form, 

 which sometimes reaches large dimensions, at all the remaining stations. 



220. Lagena hartiana, sp.n. (Plate IV, figs. 12, 13). 

 One station: WS 522. 



Test minute, hyaline, compressed, broadest and thickest at a point about three- 

 quarters of the length of the shell from the aperture, which is fissurine and situated on a 

 slightly thickened and produced collar. In edge-view it shows five narrow carinae, the 

 central and outer carinae projecting beyond the intermediates. The face of the test is 

 covered with longitudinal costae, five in number, converging towards the extremities of 

 the test. The facial costae are of about the same strength as the intermediate carinae. 

 Length 0-25 mm., breadth o-i mm. 



This is rather a striking little form without any very definite affinities. It may be 

 compared with a figure assigned by Sidebottom to L. orbignyana var. dathrata, Brady 

 (S. 1912, etc. LSP, 1913, p. 196, pi. xvii, fig. 14), but his specimen though agreeing in 

 general construction has only three marginal carinae and three costae running down each 

 face. Its assignment to L. dathrata seems rather far-fetched, but it is evidently closely 

 allied to my species. 



This species is named after T. J. Hart, B.Sc, of the Discovery staff. 



321. Lagena herdmani, sp.n. (Plate IV, figs. 10, 11). 

 One station: WS 523. 



Test minute, hyaline, compressed, consisting of a flask-shaped body with a produced 

 neck. The flask has two narrow thickened carinae, whitish in colour owing to the presence 

 of numerous tubuli. The carinae merge at the oral end of the flask into a tapering un- 

 tubulated wing, which extends up the sides of the neck. This neck is almost as long as 

 the flask and is continued as an entosolenian tube into the flask. The faces of the flask 

 are convex and the carinae are separated at the edges of the test by a broad space 

 showing no trace of a median keel. Length 0-22 mm., breadth 0-09 mm. 



This rather distinctive little form combines the tubulations of L. lagenoides with the 

 untubulated double carinae of L. bicarinata, and appears to be undescribed, although 

 there are several records closely resembling it, but diff"ering in essential points (compare 

 S. 1912, LSP, etc., 1912, p. 414, pi. xix, fig. 9, a description of a variety oi L.formosa). 

 His figure closely resembles my species except for its apiculate base and median 

 carina. Sidebottom states, however, that "in a few cases the wing or keel dies away 

 almost as soon as it reaches the body of the test". This variation would be practically 

 identical with my form but could no longer be ranked with L. formosa. 



Another figure deserving of reference is that of L. lagenoides, Sidebottom (S. ut 



