Notes on the Familij Catlnji^nidm. Btj J. Murray. 555 



Catliypna depressa Bryce (S). Plate XXIII, fig. 18. 

 Syii, Distyla deijvessa Bryce. 



Description. — Of moderate size, oblong. Dorsal plate slightly 

 narrower. Anterior margins nearly straight. Posterior lobe broad, 

 obscurely three-lobed. Toe short, from broadish base abruptly 

 contracted, then tapering to near point, then drawn out to fine 

 point. 



Length of lorica 115 /a, of dorsal plate 100 /a, of toe 45 /x ; 

 breadth of dorsal plate 70 /x, of ventral plate 75 /x, of anterior 

 border 50 /x. 



This meagre description is taken from a specimen lent to me 

 by Mr. Bryce. It had died partly extended, so that I could not 

 see the frontal spines which Mr. Bryce noted. In front of the 

 lorica can be seen the hyaline plates which protect the head, as I 

 have figured them in G. leontina. 



As the specimen could not be turned I was unable to see the 

 principal specific character — the great dorso-ventral flattening. 



Cathypna hrevis sp. n. Plate XXII, figs. 8a, 86. 



Specific Characters. — Very small, shortly pyriform. Dorsal 

 plate wider, faceted, roundish, truncate in front. Anterior border 

 convex, between small sharp incurved spines. Toes widely diver- 

 gent, curved, tapering, shouldered and clawed. 



Description. — Length of contracted lorica 70 /x, of dorsal 

 plate 60 /x, of toe 20 /x; breadth of dorsal plate 65 /x, of anterior 

 border 55 /x. 



The dorsal outline shows undulations which are due to faceting, 

 but that can only be faintly seen in front. The two frontal 

 margins coincide. The posterior lobe is short and broad. The 

 toes are abruptly bent outwards a little way from the base, then 

 curved backwards. The shoulder of the toe sometimes appears 

 double, sometimes single, and on the inner side. 



Habitat. — Scotland; and without locality in Mr. Eousselet's 

 collection. 



Cathypna muscicola Bryce (3). Plate XXIII, figs. 19a-l\)c. 

 Syn, Distyla muscicola Bryce. 



Description. — Very small, narrowly oval. Dorsal and ventral 

 plates of equal width, both with undulate outlines. Anterior 

 margins nearly straight, between minute spines. Posterior dorsal 

 border undulate ; posterior lobe short, rounded. Toe relatively 

 long, from broad short base tapering to very slender points. 



