BRACHIELLA PARKEKI. 213 



what similar in structure to those of Braclriella pas- 

 tinaca. Rostrum somewhat prominent; mandibles 

 slender, their inner margins armed at the distal end 

 with about four tolerably large teeth and with smaller 

 teeth between. Maxillae of the usual type, resembling 

 those of Brachiella triglse. First maxillipeds stout 

 but somewhat rudimentary and only feebly uncinate ; 

 second maxillipeds long and slender, fully twice the 

 length of the cephalothorax, and entirely free except 

 at the tip, where they are united to a chitinous horn- 

 coloured disk. 



Habitat. Obtained on the gills of a long-nosed 

 skate (Raia oxyrliynclms) captured off the Northumber- 

 land coast in May 1908 (May E. Bainbridge). 



We have not met with this species, but Miss Bainbridge, in her 

 paper referred to above, gives a careful description of it. Her 

 desci-iption and drawings agree very well with those of G. M. 

 Thomson. The following measurements of the specimen 

 examined are given by Miss Bainbridge : 



Length from top of arms to end of abdomen 9*2 mm. 

 from end of head to extremity of 



attachment .... 19'0 

 of arms ..... 14*5 

 of body from bend of neck to end 



of abdomen .... 8'0 



of head to bend of ^ieck . . 5*3 



of process ..... 4'0 



Width of neck ..... To 



of genital segment . . . 5'2 



Genus 43. CLAVELLA OJcen, 1815. 



Syn. Schisturus Oken (1815). a name preoccupied by Rudolph! (1809) 

 for a genus of Vermes. Anchorella Cuv. (1817). Lerneomyzon Blainville 

 (1822). 



Female. Body usually short and somewhat swollen. 

 Head small, situated at the end of a long flexuous 

 neck which is usually more or less deflexed. Both 

 pairs of antennae small and somewhat rudimentary; 

 the mandibles, maxilla?, and first maxillipeds resem- 

 bling those in Lernseopoda, and, together with the two 



