LITUOLIDAE 79 



115. Haplophragmoides rotulatus (Brady). 



Haplophragmium rotulatimi, Brady, 1879, etc., RRC, 1881, p. 50; 1884, FC, p. 306, pi. xxxiv, 



figs. 5,6. 



Haplophragmoides rotulatiim, Cushman, 1918, etc., FAO, 1920, p. 47, pi. ix, figs. 3, 4. 



Two stations: WS 334, 351. 



Rare at WS 334, where the best specimens were found, and verj' rare at the other 

 station. None of the specimens is very typical. 



Genus Ammobaculites, Cushman, 19 10 



116. Ammobaculites agglutinans (d'Orbigny) (F 96) (Plate II, fig. 22). 

 Eight stations: 151; WS63, 113, 334, 351, 353, 429, 472. 



Generally very rare, often represented by a single specimen. At WS 63 a single large 

 and typical individual. At all the other stations the specimens are of the minute elongate 

 form figured by Brady (B. 1884, FC, pi. xxxii, fig. 22). They are most numerous at 

 St. 151, WS 334 and 472. In length they range up to o-6 mm. 



Cushman (C. 1918, etc., FAO, 1920, p. 67) has made this particular figure of 

 Brady's a synonym for his species Ammobaculites reophaciformis (C. 19 10, NAFP, 

 p. 440, figs. 12-14; 1921, FP, p. 92, pi. xi, fig. 3 ; pi. xiv, fig. 3) on grounds which are not 

 very evident to me. His species is stated to live in shallow water on coral reefs, and has 

 a length up to 3-5 mm. It bears little resemblance to Brady's figure, which was drawn 

 from a specimen from Challenger St. 5, in 1090 fathoms to the west of Gibraltar 

 Strait. Brady's specimen is about 0-32 mm. in length and appears to be nothing more 

 than a pauperate condition of the common type. I have no hesitation in referring the 

 specimens to A. agglutinans, and attribute their small size to depth and unsuitable 

 conditions of life. At most they are only worthy of varietal distinction. 



117. Ammobaculites americanus, Cushman (F 97). 



Twenty-two stations: 14, 16, 20, 27, 30, 45, 123, 131, 136, 144, 148, 149; WS 28, 41, 42, 45, 47, 

 50, 349. 357; MS 14, 68. 



Widely distributed and sometimes frequent to common. It appears to be almost 

 confined to depths between 100 and 300 m., none of the records being from less than 

 loom, and only two from over 300 m. The deepest record was at St. 16 in 727 m., where 

 a single specimen was obtained. The best stations were St. 144 (frequent) and WS 28 

 (common). At the last station an abnormal specimen was found in which the apertural 

 end was surrounded with an ovate mass or cyst of loosely aggregated sand and mud. 

 Whether this is a development from the organism, or a post-mortem attachment, cannot 

 be definitely stated. The latter case is the more probable as the sand grains embodied 

 are black as compared with the quartz in the actual test. The line of demarcation be- 

 tween A. americanus, Cushman, A. temiimargo, Brady, A. rostratus, Heron-Allen and 

 Earland, and A. bargmanni, sp.n., is very obscure in the early stages, which are practi- 

 cally inseparable. Only adult specimens show marked specific distinctions. 



