522 ^^ Stephensen. 



has several rows of closely placed, small teeth, but with a break in 

 the middle on each side. 



The 1st pair of maxillae (fig. 25), in the undivided posterior 

 portion of the mastigatory part, resemble more stage В (fig. 15), but 

 the palp is unjointed though it has a constriction in the middle 

 and the front part of the exopodite is more rounded anteriorly, 

 wiiilst the hindmost part is very short. 



The 1st pair of maxillipedes (fig. 26) take up an intermediate 

 position between stage A and stage В (figs. 6 and 16); the palp is 

 divided into 3 parts by constrictions, but has no true articulations; 

 the epipodite has no notch on the outer edge. 



The 2nd pair of maxillipedes (fig. 27) have a great resemblance 

 to stage A (fig. 7); the principal difference seems to be, that the 

 exopodite is a little longer and narrower, and that it has the re- 

 mains of 3 ciliated setæ at the tip. 



The 3rd pair of maxillipedes and the pereiopoda (figs. 28, 29) 

 have such an obvious resemblance to the two other stages (figs. 8 

 and 18) that they require no further description ; the break on the 

 3rd joint of the 3rd pair of maxillipedes does not seem to be 

 natural. 



The 1st - 5th pairs of pleopoda have the same form as in the 

 other stages (figs. 9 and 19). Of the uropoda (fig. 30) only the endo- 

 podite is complete; it is much shorter than the telson. The end of 

 the exopodite is wanting. 



The great resemblance with the two preceding stages leaves no 

 doubt possible, that this specimen also belongs to the genus Spiron- 

 tocaris; in age it seems to come nearest to stage A. The principal 

 difTerence from the two other specimens seems to be the absence of 

 palps on the mandibles. 



D. Mysis stage of a Spirontocaris (?). (PI. XLIII.) 



St. 77. Danmarks Havn, 0-20 m. 13—9—1907. 1 spec. 



The carapace (fig. 31) is about l/3rd of the whole length of the 

 animal; it is very nearly cylindrical. Rostrum long and thin, l/3rd 

 of the length of the carapace without rostrum, somewhat shorter 

 than the eyes; a little behind the base of the rostrum there is a 

 small tooth on the back of the carapace. Above each eye a fairly 

 large spine, below the eye and on the lower, anterior corner of the 

 carapace a small projection. 1st and 2nd abdominal segments almost 

 equally long (the 2nd however the longer); the 3rd segment equal 

 to the 1st and 2nd together; the 4th and 5th of the same length as 

 the 2nd and with a strong spine almost midway on each side of 



