158 



PROCEEDINGS OF THE ACADEMY OF 



[Feb., 



In [the wanting tubercles of the dorsal surface and the form 

 of the lateral angulations, this species is related to the two species 



of the genus known from the North Pa- 

 cific, and lhe form of the pleon recalls that 

 of J. erostrata Rich. (Aleutian Islands). 

 But it differs (1) in the presence of a 

 long rostrum, (2) in the stronger develop- 

 ment of the lateral angulations of the head, 

 (3) in the slightly different angulations of 

 the second and third segments of the 

 pereion. 



The generic name Tole has been given 

 to replace Janthe Bovallius nom. prseoccup. 

 (1865 Mars, 1867 Stâl). (Type, J. spe- 

 ciosa Bov. = spinosa Harg. ) 



The following key to the species of 

 Tole = Janthe may serve to express the 

 affinities of our new species: 



a'. — Pleon produced backward into two 

 large angulations, between which 

 the uropods are inserted (6). 



a". — Pleon produced into one smal) me- 

 dian extension, on each side of 

 which there are incisions for the 

 insertion of the uropods. (Rostrum very short. Two lat- 

 eral angulations of the head. Segments of pereion each 

 with one median, obtuse tubercle, J. bovallii (Studer)). 11 



East Patagonia. 



-Segments of pereion dorsally with spines or tubercles (c). 

 -Segments of pereion dorsally smooth (d). 

 -Segments of pereion dorsally each with two submedian, short, 

 spine-like tubercles. First segment with one, second to 

 fourth with two large angulations, fifth to seventh with 

 one large and one (posterior) small angulation, 



J. spinosa (Harger). 12 

 Nova Scotia, Baffin Bay, West Greenland. 



11 Abh. Akad. Wiss., Berlin, 1883, p. 10, PI. 1, fig. 2. 



12 Harger, Proc. U. 8. Mus., Vol. 2, 1879, p. 158, and Rep. U. S. Fish 

 Comm., 1880, p. 323, PI. 2, fig. 10 (Janira spinosa); Hansen, Mal. mar. 

 Groznl. occ, 1887, p. 191 ; Janthe speciosa Bovallius, Svensk. Vet. Ak. 

 Handl., Vol. 6, No. 4, 1881, p. 4. 



