﻿COPEPODA 



221 



The rosfruni has the V)asal portion lon<; and rather .slender, and is divided into two rather short 

 branches, which each possesses a very short tooth; the whole strnctnre is completelv like Scott's 

 fig. 4, PI. XXVII. The crista is scarcely different from that of the female. The fifth thoracic lergite 

 has near the dor.sal margin a distinct .slender tooth, almost reaching the middle of the first genital somite. 

 The abdomen (text-fig. 72 a) is like that of the preceding .species, bnt the lateral process of the first genital 

 .somite is less prominent. The antnuiular as well as the oral appendages are scarcelv different from 

 those of S. Tliorii (text-fig. 72 b); the iialafory legs do not differ from tho.se of the females. The right 

 endopodite of pes V (text-fig. 72 c) is very short, and consists of three segments, which are indistincth' 

 separated; the second segment is the longest, and the third one is a short conical process bearing a 

 .slender seta. The first outer segment is long, and distinctU' widened out terminally, where it medially 

 possesses 3 expansions anteriorly and a single more prominent outer one posteriorly; the second outer 

 segment is comparatively short, and, outwards, 

 convex with a terminal expansion, and the third 

 one is short, rounded, with a single spine. The 

 described terminal parts of the right exopodite 

 form a clasping organ (text-fig. 72 c—d). The 

 two cylindric basal segments of tlir left lr<; 

 (text-fig. 72 e) have each a basal rounded process 

 as seen in figure; the third basipodite has an 

 inner terminal one as well. The left endopodite 

 consists of two segments, of which the one is 

 rather short and rounded with distal process, 

 while the other has two diverging processes, 

 of which the one is axeshaped. The le/f cxo- 

 poditc consists of a short basal segment and 

 a longer distal one, inwards excavated and 

 enlarged towards end; the inner margin of 

 this is terminally and posteriorly densel\- spinou.s, 



and anteriorlv a laminous process divided into two .spines is found. The third segments consists of a 

 rounded ba.sal portion with a few teeth, and a much longer pointed spinelike portion (PI. \'III figs 

 13 a-b). 



Yg (St. V). vSize of female from Thor St. 82 was 3-45 mm.; anterior division 2-80; urosonie 0.65 

 mm. .Size of female from St. 90 was 3-54 mm. 



The frontal keel is less prominent than ni the adult, though distinct. The lateral corner is 

 produced into a distinct tooth (text-figs 73 a— e). 'V\\<i fifth foot of the female is much shorter than in 

 the preceding species; the limitation between the segments is more indistinct, the third outer segment 

 is onlv represented bv a short spine, and the inner spine is not as long as the three terminal .segments 

 (text-figs 73 c— d). The A'/W fool of the male is characterized by a short, distinct spine in the left exo- 

 podite as well as by the pointed endopodite; the branches of the right side, especially the endopodite, 

 are distincth' more rounded. 



Text-fig. 72. Scottocalaniii sixuri/rons Til. Scott fc". 



a. .\bdouien X 15- b. Segments VII XIV of the left antcnnula 



': 51. c. Pes V dext. X 33. d. Pes V dcxt. Ke II III in risht 



view. e. Pes V sin. tun first seniiieiits in dorsal view. 



