2 DR. T. SCOTT ON COl'Ei'ODA 



a piece of wood dredged from about 87 fathoms iu the Faroe 

 Chanuel ; tlie wood was perforated to a considerable extent by 

 the boring mollusk, Xylopliarja dorsalis, Turton. Seven species 

 of Copepoda,each represeutiag a separate genus, and all belonging 

 to the Harpacticidse, were obtained in this piece of wood ; three 

 of the species appear to be undescribed, but the others are all 

 more or less widely distributed. 



The drawings which illustrate these notes were made a few 

 years ago by my son, Mr. Andrew Scott, but shortly afterwards 

 were mislaid and have only recently been recovered. 



COPEPODA. 



Haupacticii)^. 



ZosiME, Boech, 1872 *. 



ZosiME TTPICA, Boeck. 



This species, which is somewhat widely distributed, was 

 represented by very few specimens. 



PsEunoTACHiDius, T. Scott, 1898 t- 



The genus Pseudotachidius was instituted in 1898 for an 

 interesting copepod discovered in the deep water at the mouth 

 of Loch Fyne, and as there was but one species known at the 

 time, the generic description was included in that (jf the species ; 

 but as another copepod has been found belonging apparently to 

 the same generic type, it will be better now to give a separate 

 definition of the genus. 



Definition of the Genus Pseudotachidius, T. Scott. 



Cephalothorax moderately broad, somewhat depressed ; abdo- 

 men moderately narrow, more or less distinct from the cephalo- 

 thorax. Antennules short, five- or six-jointed. Antennge with 

 secondary branches well developed and composed of three joints. 

 Mandibles nearly as in Tachidius, Lilljeborg, and with a mode- 

 rately developed two-branched palp. Other mouth-organs also 

 similar to those of Tachidiiis. Both branches of the first four 

 pairs of thoracic feet three-jointed, inner branches of first pair 



* Mon. British C'opepoda, Brady, vol. ii. p. 14 (1880). 



t 16th Ann. Kep. Fishery Board for Scotland, part iii. p. 267 (1898). 



