\ l\ 



Platytyphlopa orbicularis Calm. 



Ireland, Sd [nve I p t ;. PI V. figs. 77 8i 



1 S Nat Mus \ "1 11, p. 631, figs 20, ;'! 

 ibing, I >aj Tierr< Lii I p 



'- • taken by the but l>> the "Tl 1 single -t.iti 



]..ii ''i 1 N . Long g |o \\ 11, i.itli.. [2 specimens, all mutilated, 



mosl of them fragmei I 

 tribution. Th< tablished on iecimen gathered wesl ol Ireland: 77 miles 



W N W "i Achill Head, co Mayo, 382 t .it li it has been recorded from 4 stations situated 



itnerica, from I. at. 39. 54' _, N . Long. 7c J" W to La1 [2 N Long 71 ,- W 



<. di 



Platysympus Stebbing. 



this fine genus only 2 species arc known. One among them, /'. typicus.G ' >. Sars, ha- been taken 



at the v. Norway in souk- localities from Lofoten to Hardanger Fjord, besides wesl ol Ireland 



and in the Mediterranean, consequently it might Ik- possible to find it in the southern part ol tin- "Ingolf" 



an-a It has, however, not been discovered there, but I was somewhat surprised in seeing that a couple of 



npus taken south of Iceland belong to a new species. 



47, Platysympus tricarinatus n. sp. 

 (PI. IV. figs ;a ,;c). 



Immature Specimens Male and Female). Carapace (fig eems to lie proportionately a 



little broader than in P. tvpiats (',. ( ). S., and with the lateral margins less converging forwards, but as it 

 ■ icked in both specimens some uncertainty as to the outline remains. Hut a valid difference between it 

 and that in the last-named Spi 1 ies 1- that it- surface is adorned with three obtuse but distinct keels, one in 

 the median line, and one about halfwaj between the median keel and the lateral margin; these sublateral 

 Dteriorly near the end of the fissure separating the pseudorost rum . the surface is a little hollowed 

 alonu the lateral 1 ij I 'ice segment differs extremely from that in /'. tvpiru^: it is scarcely half as 



ch antero-lateral comer produced, curved somewhat forwards and acute, 

 whili ■ half is strongly narrowed, less than half as broad as the anterior part, and the lateral 



ave. Second free segment without distind keels 



•hn-e pairs of maxillipeds and second pair of legs differ only in a few minute partieu- 



other cephalotl es are mutilated. Uropods (fig. [b 



■ than the two po b riot - J segments together and 



pod; both peduncle and endopod a- in P. typicus, bu1 tJ "I diiters 



il joinl oi the endopod, while in the othei species it does not 



