122 NOTES ON THE COPErODA OF THE 



size and proportions of the saws of tlie feet from the latter. One 

 example only occurred at a depth of 400 fathoms at station 55° 47' N. 

 It may perhaps be the ? of L. magna, but is better described, pro- 

 visionally at least, as a new species. 



22. Augaptilus zetesios, Wolfenden. A $ which has already been 

 described in this Journal (January, 1902). 



23. Auga'ptilus magnus (nov. s^).). $ 7 mm. long and over. Anterior 

 antennae reaching to the end of furca ; genital segment larger than the 

 rest of the abdomen ; second abdominal segment as long, or a little 

 longer, than the anal segment ; furcal segments very short ; mandible 

 two-branched ; maxilla with seven strong hooks, outer lobe with five, 

 exopodite with only two, second inner lobe with one long hook bristle ; 

 both basal joints of the posterior foot-jaw of similar length ; endopodite 

 much shorter. Branches of the posterior antenna subequal. Itami of 

 the fifth feet three-segmented. 



It has most general resemblance to A. mcgalHrns (Gbt.), a Pacific 

 Ocean form, while the furcal segments and shape of the abdomen some- 

 what resemble A. filigcrus, but it is nearly twice the size of the latter, 

 and differs in the anatomy of the anterior and posterior antenna?, maxilla, 

 etc. It is a purely deep-water form, found only in the warm area of the 

 Atlantic. 



24. Augaptilus gibhus (nov. sjh). The back of the head has a remark- 

 ably gibbous swelling. The anterior antennae are not quite as long as 

 the whole animal. The exopodite of the posterior antenna is not half 

 the length of the endopodite ; mandible with two-branched palp ; basals 

 and endopodite of posterior foot-jaw equal in length ; genital segment 

 longer than the rest of the abdomen ; anal longer than the second, and 

 furcal longer than the anal segment ; maxilla with outer lobe with 

 three, inner first lobe with six hooks ; exopodite with four bristles. 

 Size, 2-75 mm. 



25. Pseudocydopia Gieshrechti, Wolfenden. This was described in this 

 Journal (January, 1902). 



26. JEgisthus atlanticus, Wolfenden. Mentioned in this Journal 

 (January, 1902). 



This striking and beautiful little Copepod bears a very close resem- 

 blance to JEgisthus mucronatus (Gbt.), but differs in the following points : 

 there is no spine on the third segment of the anterior antennae ; there 

 is a long sensory process on the last joint resembling the sensory process 

 on the third segment (this is the only one present in yEgisth. mticroii.) ; 

 the first feet are clearly three-segmented (two-segmented in JEgisth. 

 muc.)\ the terminal lance bristle of the fifth foot is only about half the 



