170 On a new Heterotanais and a new Eurydice. 



usual in species of the genus ; last joint furnished with a few 

 setas at the extremity. 



Antennre \Yith the last joint of the peduncle much longer 

 than the penultimate, much constricted at the base. 



First feet with the fourth joints very small. There are 

 five spines on the third joint, one on the fourth joint, and 

 lour on the hand. 



The last legs are wholly devoid of spines on the face of the 

 limb; the ends of the joints are truncate, the thir^l not at all 

 produced downwards behind. 



The telson is broader than long, very widely and evenly 

 rounded at the extremity, and furnished with about sixteen 

 serrulations of equal size, alternating with setoa. Uropods 

 longer than the telson and reaching to some distance beyond 

 its extremity; both inner and outer branches bear two small 

 distal spines, buried among the fringing sette. 



The broad telson, with its widely rounded and distally 

 .serrulated extremity and absence of spines or of lateral serru- 

 lations larger than the others, at once distinguishes this species 

 from its allies. The forms nearest to it are E. pulchra and 

 E. inermis ; but in the former the extremity is not nearly so 

 wide and two pairs of spines are present among the serrula- 

 tions, while in the latter the extremity is not equally rounded, 

 the outermost serrse are somewhat larger than the others, and 

 the uropods are distinctly shorter than the telson. The 

 specimen is a female. 



The type here described was dredged by the ' Porcupine ' 

 in 1869, but unfortunately no number of the dredging is with 

 the specimen^ and therefore the nearest approach which can 

 be given as the habitat is Eastern North Atlantic. 



EXPLANATION OF THE PLATES. 

 Plate V. 



Fig. 1. Heterotanais Gumei/i, sp. n., 5> dursal view. 



Fig. 2. „ „ Cheliped, $ . 



Fig. 3. „ „ Chela of cheliped, 2 • 



Fig. 4. „ „ Second leg, $ . 



Fig. 5. „ „ Antennule, J • 



Fig. 0. „ „ Cheliped, J , inner face. 



Fig. 7. „ „ „ „ outer face. 



Plate VL 

 Fig. 1. Heterotanais Gurneyi, sp. n. L' roped, S • 



Fiff. 2. Heterotanais Orstedi, Kruyer. Cheliped, J, inner face. After 

 F. :Miiller. 



