of the Fishery Board for Scotland. 



243 



specimen whose appendages were not very obvious even with a moderately 

 high magnification. 



Some moderately rare species of Amphipoda and Sympoda are recorded 

 at the end of the paper, the names of which are as follows : — 



Hyperia medusarum (0. F. Muller). 

 Tryphana malmi, Boeck. 

 Anonyx nugax (Phipps). 

 Hoplonyx cicada (Fabr.). 

 llarpinia • pectinata, G. O. Sars. 

 Metopa borealis, G. O. Sars. 

 Paratylus falcatus (Metzger). 

 Megaluropus agilis, Norman 

 Idothea neglect a, G. 0. Sars. 

 Eudorellopsis deformis, Kryoer. 

 Pseudocuma similis, G. 0. Sars. 



The following are the descriptions of the various species referred to : — 



COPEPODA. 



Fam. MONSTRILLIDiE 



Genus Monstrilla, Dana, 1848. 



Monstrilla grandis, Giesbrecht. PI. xiii., fig. 11, 12; pi. xiv., fig. 9-11 ; 

 pi. xv., fig. 1, 2. 



1892. Monstrilla grandis, Giesb., Pelag. Copep. des Golfes v. 

 Neapel, p. 588, pi. 46, fig. 2, 8, 11, 17, 19, 24, 25, 35, 39. 



Description of the Female : — In this species the antennules of the 

 female, which are moderately stout, are scarcely equal to one-fourth the 

 length of the animal ; their structure is somewhat similar to that of the 

 antennules of M. gracilicauda, but the articulations are rather more 

 distinct (fig. 9, pi. xiv.). 



The fifth pair of thoracic feet are sub-cylindrical, about twice as long 

 as broad, and with a somewhat bi-lobed extremity (fig. 10, pi. xiv.); the 

 exterior lobe bears three setae, the inner one is small but the other two 

 are elongated. The inner lobe appears to be furnished with only a single 

 apical seta, but our dissection shows what appears to be the base of a 

 seta on the inner margin of this lobe, the seta itself having probably 

 been broken off ; the position of this seta is indicated on the drawing by 

 dotted lines. 



The abdomen consists of three segments, but the first, which is larger 

 than the next two combined, is divided into two portions by a pseudo- 

 articulation as shown by the drawing (fig. 11, pi. xiii., and fig. 11, pi. xiv.) ; 

 the second and third segments are sub-equal and are together much 

 smaller than the first segment. 



The furcal joints are each provided with six setae, one being situated 

 on the outer edge near the base of the joint while the others spring from 

 the apex (fig. 11, pi. xiv.); one of the apical setae near the inner edge is 

 very small. 



The female represented by the drawing (fig. 11, pi. xiii.) measures 

 4 - 25 mm. (about ^ of an inch). 



Description of the Male : — The male is much smaller than the female ; 

 the specimen represented by the drawing (fig. 12, pi. xiii.) measures only 

 2 mm. (-g 2 - of an inch). 



