24 G. o. sars. preliminaky notices ok the schizopoda. 



densely ciliated joints, beside the basal portion. Last pair of legs 

 quite rudimentary, forming a very small inarticnlat ed and nacked 

 flexuous stem, without any trace of exopodite. Last pair of bran- 

 chiæ very complex. Inner lamella of 2nd pair of pleopoda in the 

 male only slightly modified. Number and arrangement of the 

 phosphorescent spherules as in Euphansia. 



Eemarks. This new genus is mainly characterised by the 

 peculiar reflexed leaflet on the antennular peduncle, as well as by 

 the structure of tbe two last pairs of legs, which is equally diffe- 

 rent from what is observed both in Thysauopoda and Euphausia. 

 Beside the new species described below. the northeru forms Thy- 

 sanopoda Couchii Bell and Thysanopoda norvegica M. Sars belong 

 to this genus. The generic name here proposed is a translation 

 in Greek of the appellation „Noctiluca" contrived by V. Thomp- 

 son for a form of this family but preoccupied in the Zoology for a 

 Protozoan. 



28. NyctipJianes australis n. sp. 



Form of body rather narrow. Carapax without any lateral 

 denticle; anterior part distinctly keeled above; rostrum very skort; 

 frontal margin forming on both sides an obtuse angle above the 

 eyes. Two anterior postabdominal segments slightly produced 

 above in the middle of the posterior margin; epimera of moderate 

 size, posteriorly curved. obtusely pointed at the tip. Last segment 

 short, not exceeding iu length the others; præanal spine obsolete. 

 Eyes rather large, pyriform. Antennular peduncle much elongated, 

 basal joint somewhat flattened, and produced at the onter edge iu 

 a strong spine; dorsal leaflet with the inner edge pointed, the 

 outer margin entire; 2nd joint in the female twice the length of 

 the third. Antennal scale rather small and narrow. not reaching 

 the end of the 2nd joint of the antennular peduncle. apex trunca- 

 ted, outer edge produced in a distinctly developed tooth; basal 

 spine very small. Mandibular palpus rather elougated, with the 

 last joint slightly dilated at the end. aud armed at the interior 



