312 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 105 



fortunately none of these (except pi. 90, fig. 1, also without ovicells, 

 unfortunately) seems to agree with Johnston's figure. Brown (1952, 

 p. 330) is of the opinion that Busk's plate 102, figure 1 is possibly 

 Brown's Smittina acaroensis, but Brown's S. acaroensis appears to be 

 Smittoidea evelinae Marcus 1937 rather than Levinsen's S. acaroensis. 

 Hincks (1880, pi. 48, figs. 1-5) beautifully figured Smittia reticulata 

 but only his figure 2 approaches that of Johnston's figure 10 and 

 Busk's plate 90, figure 1. 



Canu and Bassler in their genuinely helpful and monumental 1920 

 monograph reproduced Hincks' plate 48, figures 1, 4, 5 as the Smittina . 

 reticulata MacGillivray. 



Brown (1952, pp. 329-330) has valiantly attempted to unravel some 

 of the tangled skein but the task has been difficult. 



Osburn's Smittoidea reticulata (1952, pi. 48, figs. 9, 10) appears to 

 differ somewhat from the species listed above. His Smittoidea pro- 

 lifica, however, does come closer to Johnston's figure than does his 

 reticulata. 



Lastly, Basslor (1953, p. G209) considers S. prolifica Osburn a ; 

 S3monym of Lepralia reticulata Johnston, 1847. 



Regardless of how great the confusion is, so long as each writer 

 adequately illustrates his finds there is hope of eventually stabilizing s 

 the synonymy. 



Diagnosis (of the present Antarctic specimen only): Frontal an i 

 areolatcd pleurocyst. Primary orifice small, as long as wide, smitti- 

 noid, with low medium-wide lyrula, lateral cardelles, and a small oval \ 

 avicularium in front of the lyrula, within the peristome, i. e., in a 1 

 widely open peristomial loop. Other avicularia, oviceil, and ultimate 

 appearance of secondary orifice and peristome unknown because of' 

 paucity of material. 



Measurements: Minimum to maximum and average measurements, 

 in millimeters, are given below (for explanation see p. 271). The 

 measurements are based on only two or three readings because of so 

 little material. 



Z-L, 0.792-0.994 (0.912) Ly-L, 0.029 



Z-W, 0.475-0.850 (0.655) Ly-W, 0.072 



Av-L, 0.115-0.122 (0.119) Pr-Or-L, 0.158-0.187 (0.173) 



Av-W, 0.079-0.101 (0.090) Pr-Or-W, 0.173-0.187 (0.181) 



ZooEciA. Only pieces of 11 broken zooecia mounted on a shde after 

 having been removed from a rock from Station 184 could be found. 

 Of these pieces three frontals had orifices and two had incomplete 

 avicularia. The zooecia are of considerable size. Their distal walls 

 are curved, the lateral walls curved to angular. The frontal walls 

 are areolated and roughened (a pleurocyst). The areolae are of 

 varying shapes. 



