Mr. E. J. Miers on new Species of Crustacea. 73 



12. Yoldia subatquilateralis, sp. nov. 



Testa ovalis, postice acuminata, subicquilateralis, postice paululum 

 brovior, convexiuscula, epidermide olivacea vol flavo-olivacea 

 induta, concentrice rugose striata, utrinque umbonibus ad margi- 

 nem subventralem striis paucis subgranosis radiautibus insculpta, 

 utrinque leviter hians, intus caeruleo-alba ; margo dorsalis utrinque 

 raultum declivis, antice levissime eonvexo-arcuatus, postice fere 

 rectus ; margo ventralis ubique arcuatus ; latus anticum late 

 rotundatum, posticum subacuminate productum ; fovea ligamentalis 

 parva triangularis ; dentes cardinales utrinque 11 ; sinus pallii 

 latissimus parum profundus. 



J^at. 34 mill., long. 23, crass. 9. 



Hah. Swain's Bay, Kerguelen's Island. 



I know but one species which approaches the present one 

 somewhat closely, namely Y. Eightsii of Couthouy. From this, 

 however, it is well distinguished by its difference in form. By 

 reference to Jay's figure upon which Y. Eightsii is founded 

 (for no description is given ; Cat. Shells, 1839, ed. 3, pi. i. f. 12 

 & 13), it will be perceived that a very inequilateral shell is 

 there represented, with a much excavated posterior dorsal slope ; 

 on the contrary, Y. subaiquilateralis is almost equilateral, with 

 a straight posterior dorsal acclivity. 



VI. — Descriptions of new Species of Crustacea collected at 

 Kerguelen J s Island hy the Rev. A. E. Eaton. By Edward 

 J. Miers, Zoological Department, British Museum. 



The Crustacea collected at Kerguelen's Island (exclusive of 

 the Entomostraca, which have not yet been examined) amount 

 to ten species, seven of which are here described for the first 

 time. One of these, Serolis latifrons, is mentioned (but not 

 characterized) by A. White, in the ' List of Specimens of 

 Crustacea in the British Museum ;' and examples from the 

 Auckland Islands have long existed in the Collection. 



Dynamene Eatoni, n. sp. 



Convex, smooth, naked, with the sides of the pereion nearly 

 parallel. Cephalon transverse, deeply encased within the first 

 segment of the pereion ; its front with a thin raised marginal 

 line. Eyes very small. Segments of the pereion narrow, of 

 equal width above ; the seventh segment produced backward 

 on the sides over the front of the first (real) segment of the 

 pleon. Segments of the pleon (the last excepted) coalescent, 



