ME. E. J. MIEES ON THE IDOTEIDJE. 31 



;m5," in Avliat is imdoubtedly Linngeus's liandwritiug *. Hence 

 I have little hesitation iu citing his name for this species. Latreille 

 and Lamarck apparently confounded two distinct species nnder 

 the name /. marina. 



The Idotea Irevimiula, Dana, from Eio de Janeiro, I believe to 

 be synonymous with /. marina, although, iu the remarks following 

 the specific description, the author says, " Like the front, the 

 centre of the caudal margin is apiculate." According to the 

 specific description, however, and the figure, the front is truncated, 

 without any median prominence. 



The small example figured by Dana (pi. xlvi. fig. 5) as possibly 

 the young of this species is designated above /. Danai. 



The species designated /. triciispidata by Catta, Ann. Sci. JSTat. 

 (ser. 6) iii. p. 31 (1876), appears, from the description of the 

 terminal segment, not to be referable to /. marina. It may 

 perhaps be I. metaUica, Bosc. 



Idotea Slahierii, Bos (f. c), is, according to its author, only 

 distinguished by its more oblong form and relatively shorter 

 antennae ; the figure, which is a mere outline sketch, is obviously 

 inaccurate as regards the segmentation of the postabdomen and 

 the form of the epimera. It appears to represent var. pelagica. 



Idotea maeika, var. phosphoeea. 

 Idotea oxyura. White {ined.), 



Idotea phospliorea, Harger, Re]}. U.S. Fish Commission, i. p. 569 



(18/4), vi. p. 347, pi. V. figs. 27-29 (1880) ; id. Proc. U.S. Nat. Mus. 



ii. p. 160 (18/9); Verrill, Am. Journ. Sci. 8,- Arts, (ser. 3) vii. pp. 43, 



45, 131 (1874); id. Rejy^ U.S. Fish Commiss. i. p. 316 (18/4); Whit- 



eaves, Am. Journ. Sci. 6J' Arts, (ser. 3) vii. p. 218 (18/4) ; id. Further 



Dredging G. St. Lawrence, p. 15 "(1874)." 



This variety (or possible species) is nearly allied to I. marina, 



but may be distinguished by its rougher and more tuberculate 



body, and generally by its more acute terminal postabdomiual 



segment, which, in the specimens I have seen (and in Harger's 



figure), is rounded o& at the distal end to the median terminal 



tooth, which is somewhat produced. The epimeral sutures of 



the second and third thoracic segments do not completely cross 



the segment, but allow the rounded postero-lateral lobes of these 



segments to form a part of the lateral margin. Length about 1 



inch (25 mm., Harger), breadth rather more than j inch (7 mm.). 



* The label has been pronounced to be in the handwriting of Liuua."Lis bj- 



Dr. Ewald Ahrling of Arboga, Sweden, a gentleman well versed in all mattcre 



concerning the MSS. and correspondence of Linnanis. 



