720 MESSES. E. HEEON-AI,LEN AND A. BAELAND ON THE 



423. Kotalia calcar (d'Orbigny). 



Calcarina calcar d'Orbigny, 1826, TMC. p. 276. no. 1, Modele uo. 34. 

 Rotalia armata d'Orbigny, 1826, TMC. p. 273. no. 22, Modele no. 70. 

 Calcarina calcar d'Orbigny, 1839, FC. p. 81, pi. v. figs. 22-24. 

 Rotalia calcar Brady, 1884, FC. p. 709, pi. eviii. figs. 3 & ?4. 

 Rotalina calcar Egger, 1893, FG. p. 423, pi. xix. figs. 1-3. 

 Rotalia calcar Earland, 1905, FBS. p. 228. 



„ Heron-Allen & Earland, 1908, etc., SB. 1909, p. 691, pi. xxi. fig. 1. 



11 Stations. 



Generally distributed, but varying greatly at different Stns. both in abundance and 

 development. The best and largest specimens were at Stns. 2 b and 11. At these 

 Stns. the individuals attained a very large size, and were of a highly decorated type, 

 both surfaces being studded with tubercular growth. All the intermediate stages 

 were also observed. At Stns. 1, 9, 10, and 12 and ? X, many of the specimens were 

 very small and flat on the superior face, differing from B. venusta Brady only in the 

 development of the marginal spines, which were weakly developed. 



424. Eotalia venusta Brady. (Pi. LIII. figs. 15-22.) 



Rotalia venusta Brady, 1884, FC. p. 708, pi. cviii. fig. 2. 

 Rotalina venusta Egger, 1893, FG. p. 422, pi. xix. figs. 13-15. 

 Rotalia ve7iusta Millett, 1898, etc., FM. 1904, p. 506. 



15 Stations. 



This is one of the most abundant and typical species in the Kerimba dredgings, 

 occurring abundantly at most Stns., although, curiously enough, it is sometimes rare 

 or absent. The species is subject to great variations, being normally inequilaterally 

 biconvex, the superior face being the flatter of the two. Many of the Kerimba 

 specimens, however, have the superior fixce highly convex, in others the inferior face, 

 which usually has the central portion fllled with secondary shell-matter, is excavate, 

 yet others have a prominent umbilical stud. The peripheral edge is usually lobulate, 

 but at some Stns. continuous, and there is a constant tendency to the formation of 

 marginal spines, especially in young examples. This reaches its maximum development 

 at Stn. IX, where specimens with a continuous denticulate margin were observed. 

 There can be little doubt that B. venusta is closely allied to R. calcar (d'Orbigny). 



425. Eotalia erinacea, sp. n. (Pi. Llll. figs. 23-26.) 



Discorbina imperatoria (d'Orbigny), var. globosa Millett, 1898, etc., FM. 1903, p. 701, pi. vii. 

 fig. 6. 



9 Stations. 



Test free, inequilaterally biconvex, consisting of about three convolutions, each of 

 five chambers. Superior face but slightly convex, chambers inflated, sutural lines 

 depressed. Each chamber terminating on its superior face in a cusp or point, which 

 is usually more or less extended in the form of a solid spine. Inferior face with a 



