544 BULLETIN 82, UNITED STATES NATIONAL MUSEUM VOLUME 1 



possess ciliated bands. They have about eighteen columnals. In two of them there 

 were two very small infrabasals; Dr. John could not see a third in either of them, or any 

 infrabasals hi the third embryo. The three posterior ciliated bands were hooplike 

 and clear, but the first and second bands were difficult to follow ; the former seemed to 

 surround a depression, the apical pit, and the latter seemed to coalesce with it for a 

 portion of its course. 



Dr. John also noted that the distal edges of the brachials are raised into stronger 

 spines than those of the corresponding brachials in E. aurora. 



Along the pinnule ambulacra there are reduced rodlike side and covering plates 

 like those of E. aurora, except that some are strongly thorny. 



Locality. Gauss (German South Polar Expedition) station, in the vicinity of 

 Gaussberg (lat. 6602'09" S., long. S938' E.); 380-400 meters. April 17, 1902; 385 

 meters (1, Berl. M.). December 12, 1902; 385 meters (2, U.S.N.M., E. 385). January 

 31, 1903; 380 meters (1, Berl. M.). February 15, 1903; 400 meters (2, U.S.N.M., E. 

 384; Berl. M.). 



Remarks. Only the original specimens collected by the German South Polar Ex- 

 pedition in 1902-03 are known. 



In 1938 Dr. D. Dilwyn John described the brood pouches and embryos of one of the 

 females hi the type series. 



EUMORPHOMETHA MARRI John* 



FIGURE 30, a-e 



Eumorphometra marri JOHN, Discovery Reports, vol. 18, 1938, p. 123 (listed), p. 129 (range), p. 157 

 (description; Discovery Investigations sta. 1948); text-fig. 8, a-e, p. 159, pi. 4, fig. 3. 



Diagnostic features . The cirri are about XL when the arm length is 25 mm,; they 

 have 23 to 28 segments and are very irregular in position; the IBri has the distal side 

 markedly concave, the axillary being rhombic in shape; PI is about 4 mm. long, with 14 

 segments, of which the first three to five are not longer than wide; the genital pinnules 

 have the segments alongside the gonads slightly expanded hi the male holotype. 



Description. The centrodorsal is rounded conical with a rounded dorsal pole and 

 the ventral border straight. The basal diameter is 1.6 mm. and the vertical height 

 1.0 mm. The cirrus sockets are irregularly arranged in two or three crowded rows. 



The cirri are XLII, 23-28, up to 9 mm. long, the apical shorter and with fewer 

 segments than the peripheral. The first segment is nearly twice as broad as long, the 

 second is two-thirds as long as broad, the third and fourth are as long as broad, and the 

 fifth is slightly longer than broad. The seventh and eighth are shorter than the fifth, 

 though longer than broad. All the succeeding segments are slightly broader than long. 

 From the twelfth onward they are broader distally than proximally and the dorsal side 

 is rounded though not raised into a keel or spine. The opposing spine is strong, in the 

 form of an equilateral triangle arising from the entire dorsal side of the penultimate 

 segment. The terminal claw is moderately strong and curved. 



The radials are very short, with a concave distal edge. The IBr t is four tunes as 

 broad as the lateral length and is moderately incised by the axillary. It is not in con- 

 tact with its neighbors. The IBr 2 (axillaries) are one-third again as broad as long; the 

 proximal borders are slightly concave, the distal more strongly concave, the anterior 



* See also Addenda (p. 837) under 1963. 



