NO. 1350. NATUBAL UlSTOllY OF THE IsryPODA—TirCirARDSON. 



53 



MEINERTIA GILBERTI, new species. 



Head set in tirst sooinent of thorax, whose antero-lateral prolonga- 

 tions extend forward to about the middle of the eya. Shape of the 

 head somewhat triangular; posterior margin straight; anterior margin 

 produced somewhat at the middle, but quite rounded. Eyes very 

 large, far apart, and situated at the sides of the head. First pair of 

 antennae consist of seven joints and extend to the mid- 

 dle of the eye; second pair contain eight joints and 

 reach the posterior margin of the head. 



The first four segments of the thorax are al)out 

 equal in length, the second being somewhat shorter. 

 The last three segments decrease gradually in length. 

 The epimera are narrow pieces at the sides of the seg- 

 ments; in the first five segments they do not reach the 

 posterior margin of the segments, although the fifth 

 pair more nearly reach the posterior margin than the 

 others; the epimera of the last two segments reach 

 (piite to the posterior margin. 



The first segment of the abdomen is as wide as the 

 last thoracic. The others are wider, increasing in 

 width gradually to the terminal segment. The last 

 segment is about three times as broad as long, and 

 quadrangular in shape. The uropoda are short, 

 reaching only a little beyond half the length of the abdomen: both 

 ])ranches are alike and of ecpial length. 



The legs all terminate in long recurved unguli. There is no high 

 carina developed on the basis of any of the legs. 

 Color reddish l)rown. 



Three specimens, two males and one female, were col- 

 lected by C. H, Gilbert at Mazatlan. They were found 

 in the mouth of J/ugil /wspes. 



7}//>..— Cat. No. 29080, U.S.N.M. 

 This species differs chiefly from Jf. </ai(d/ch(iud(l 

 (Milne Edwards)" from near locality, in the absence of 

 ,. „ , high carina', which in 2L qauchchaudil are stronglv de- 



tiG. 33.— Leg of '^ ' « i • i i v i. 



SEVENTH PAIR vclopcd on thc last four pairs of legs; m the much shorter 

 OF MEINERTIA ^^j-op^^^jji ^vhlcli ill ,V. </<! X d I ch (I >i(l I ! cxtcud lievond the 



GILBERTI. X 7. I •' I • 1 ' 



terminal segment, both branches of which are narrowiv 

 pointed at their extremities; in the much larger eyes, and in the smaller 

 size of the species, the adult female being only half the size of the adult 

 female of M. gaudlcliaad'i'i. 



Fig. 32.— Meinertia 

 gilberti, new spe- 

 CIES. X 2|. 



« Naturhistorisk Tidsskrift, XTV, pp. 8:iV840, pi. xnr, fifis. 11-15. 



