320 AMPUIPODA NOKMALIA. 



long-ovato, membranous, leaf-like plates. Telson exhibiting the 

 same character. 

 Length 1 inch. 



Hah. Atlantic, lat. 8° S., long. 46° E. {Mr. J. Crunch) ; Congo Ex- 

 pedition ; Nice {liisso) ; Cape of Good Hope {Farts Collection). 



On a careful di.sscction of this species, I have not been able to de- 

 tect even the rudiments of the inferior antennae. JMilne-Edwards 

 considers the antennte 2>resent as being those of the iufeiior pair, and 

 tlie superior pair to be represented by the horn-like prolongations 

 of the superior mai'gin of the cephalon. I have stated above that 

 the propoda and the dactyla are fused together in the pereiopoda. 

 In all the pereiopoda there is one joint less than usual, but I cannot 

 determine which is absent ; it may be that the ischium is wanting ; 

 but observing it to be almost universal in tliis division that pre- 

 hensile power consists in the propodos impinging against the carpus, 

 and that this is the case in Frimno, a very closely allied genus, I 

 believe the description that I have given most likely to be correct. 



2. Phrosina Nicetensis. (Plate LI. fig. 6.) B.M. 



Phrosina Nicetensis, JEdicnrds, Hist, des Crust, iii. p. 91. 

 Dactylocera Nicetensis, Edwards, Ann. dcs Sc. Nat. xx. p. 293 ; Atlas 

 du Rbgne Animal de Cuvier, pi. 58. f. 2. 



This species very much resembles P. seinilunata, but diffei-s in ha\'ing 

 a dorsal median tooth on the posterior margin of the third seg- 

 ment of the pleon as well as on the fourth ; in the second pair of 

 l)ereiopoda having the carpus shorter and more triangular, and in 

 having the posterior distal extremity produced into a strong tooth 

 in the third and fourth paii's of pereiopoda. 



Length y^J-ths of an inch, 



Hab. Mediterranean {Edivards) ; South of Europe {specimen in the 

 B. M.) ; Cape of Good Hope {specimen in the Paris Collection). 



The little difference between this species and P. semilunata, to- 

 gether with their having been taken in the same localities, if not 

 associated*, suggests the idea that they are merely varieties of one 

 species. 



3. Phrosina longispina, n. s. (Plate LI. fig. 7.) 



First pair of pereiopoda having the carpus large, increasing towards 

 the distal extremity, against which the fused propodos and dactylos 

 closely impinge ; anterior margin slightly crenulated ; inferior 

 angle produced to an outwardly directed blunt tooth. Second 



* Both species, from the Capo of Good Hope, were in the same bottle, wliich 

 contained only the two specimens. 



