2S2 W. SAVILLE-KENT, CONTRIBUTIONS TO A 



having three elongate tubercles developed in a linear series on 

 the inner margin of each plate ; palpi simple subulate ; terminal 

 joint of hindermost leg devoid of a claw and having several setae 

 of variable length developed in its place ; eyes forming but one 

 distinct pair. Type : JIarica 7Jiasculus Miill, sp.* 



The abnormally compressed contour of the body in the genus 

 Marica, conjoined with the insertion of all four pairs of setose 

 swimming-legs at the extreme anterior end of the body, confers 

 upon its members a remarkable resemblance to certain Olado- 

 cerous Crustacea, such as the genus Daphaia, this likeness being 

 further supported by the presence of the median suture-like dorsal 

 ridge which separates the indurated cuticular covering into right 

 and left equal halves. The presence of this ridge, together with 

 the compressed form of the body and development upon the 

 external borders of the genital plates of a differentiated granular 

 area, serve to distinguish the members of the present genus from 

 the several forms now relegated to tlie preceding genus Pseudo- 

 7)iarica. Out of the seven species formerly referred to this genus 

 by C. L, Koch, but two, M. musculits and M. ovalis, appear to 

 possess those fundamental structural characters upon which the 

 amended dias^nosis of the e^enus is here framed. To these two 

 ;a new species, J/, cruenta, discovered in the country by the 

 writer, is now added. In the Marica virescens and M. lojnda of 

 C. L. Koch, here referred to Pseudomarica, the bodies while not 

 compressed are less distinctly depressed than are the four otliei- 

 species with which they are associated, and will probably be 

 found on reinvestigation to possess otiier points indicative of their 

 transitional position with relation to these allied genera. 



Marica cruenta J. K., n. sp. 



Body compressed, elongate, elliptical, and about twice as long 

 as broad as seen from above, in profile view suborbicular with a 



* Ifarica, Koch. This genus now ))ears the name of Protitipoda, and 

 <3on tains only one species, Frantipoda musculus, a species very common in 

 England. The new species named by Saville-Kent, Marica cruenta, is 

 really only a variety, as there is no specific difference in the green and 

 red Frontlpoda except the colour. Both colours are common, and tSaville- 

 Kent had both, as I have mentioned in another note. At first sight Oxus 

 and Frontlpoda are much alike, both being long and narrow, but Oxus is 

 depressed, while Frontipoda is compressed [CD. S.], 



