104 MR. T. SCOTT ON ENTOMOSTRACA 



Hahitat. Station 23, 235 fathoms, February 5th (day collection). 



Several speciniens, a few carrying ovisacs, vv'ere ohtainecl in this gathering, which 

 was the only one in which Miracla minor was observed. It differs from both Dana's 

 species, especially in the number and proportional lengths of the joints of the anterior 

 antennae. 



Genus Machairopus, Brady. 

 Machairopus, Erady, Report on the ' Challenger' Coj^epoda, 1883. 



Machairopus idyoides, Brady. 



1883. Machairopus idyoides, Brady, Report ■ Cliallenger ' Copep. p. 101, pi. xli. figs. 1-12. 



Habitat. The shore of Sao Thome Island, January 31st (day collection). 



This collection, which contained a very small quantity of weed and sand, yielded a 

 number of Sarpacticidm, including two specimens of the Machairopus. The ' Challeuger ' 

 specimens (" two or three only were found ") were from Betsy Cove, Kergueien Island. 



The full and carefully figured details which accompany the description of this species 

 make its identification comparatively easy and certain. 



Genus JEgisthus, Giesbrecht, 1891. 



JEffisthus, Giesbrecht, Fauna und Flora des Golfes von Neapel (Pelagisehe Copepoden), p. 573 (1892). 

 Thaumatopsytlus * , Scott, MS. name, 1892. 



Body slender, elongate, and with a more or less sharp-pointed rostrum. Anterior 

 antennfe slender, in the female about equal in length to the first body - segment, 

 6-jointed ; in the male the anterior anteunjB are longer, and consist of a greater number 

 of joints. Posterior antennae somewhat similar to those of Iliracia, 3-jointed, and with 

 a small 1-jointed secondary branch. Mandibles well develojjed, the broad biting apex 

 irregularly toothed ; mandible-palp (?) absent or very rudimentary. Posterior foot-jaws 

 5-jointed, the three apical joints very small; a long, stout, curved spine springs from the 

 inner distal angle of the second joint ;. in the male the posterior foot-jaws are smaller 

 than those of the female. Both branches of the first four pairs of swimming-feet 

 3-jointed and of nearly equal length ; in the first pair in the female the articulation 

 between the second and third joints is imperfect and indistinct. Fifth pair simple, 

 1-brauched, 1- (or indistinctly 2-) jointed in the female; distinctly 2-jointed in the male. 

 The tail-seta3 of the species for which the genus is instituted are extremely long, and 

 may or may not form a generic character. {Note. — ^Tliis description was written before I 

 saw Giesbrecht's worlc.) 



jEgisthus longirostris, n. sp. (PI. XI. figs. 31-44) 



Body elongate, slender, gradually tapering towards the posterior end ; forehead 

 produced into a long pointed rostrum. Caudal stylets short, each terminating in an 



* 



Oavpariis, ■wonderful ; ;f t>XAos, a flea. 



