Iduiiella, Oedicerotidae 235 



broadly roimded in front, 1'*'^ — S*^ with deuticle at lower bind corner, 4^^ large, 

 quadrate, emarginate above, Pleon segment 3, postero-lateral corners acutely 

 iipturned, a small sinus between the point and the bulging bind margiu. Eyes 

 represented by small ovoid patcbes of whitisb pigmeut, Antenua 1, 1^* Joint 

 scarcely longer than 2^ and 8*^ corabined, flagellura subequal to tbe peduncle, about 

 12-jointed, accessory flagellum not balf as long, slender, 5-jointed. Antenna 2 

 scavcely as long as antenna 1, ultimate Joint of pednncle a little shorter tban 

 penultimate, flagellum shorter than the 2 combined. Mandibular palp more 

 fully developed than in Liljeborgia, 3*1 Joint long and falciform, Maxillipeds, 

 palp smaller than in Liljeborgia. Gnathopod 1 in 9 , 2*1 Joint somewhat fusiform, 

 5tii ygiy giigiitly produced, 6*^ very large, gradually widened distally, palm 

 nearly transverse, slightly convex, defined by a distinct angle and 2 unequal 

 spines, finger slender and eurved. Gnathopod 2 in 9 similar, but with 6^*' Joint 

 a little smaller. Gnathopod 1 in c? very large, 6**^ Joint longer. than joints 

 2 — 5 combined, palm long, concave, very oblique, defined by an acute tooth, 

 the Joint greatly narrowed towards the hinge near which the palm ends in 

 a small denticle, finger long, slender, greatly eurved. Gnathopod 2 in d as 

 in 9 , much smaller than gnathopod 1. Peraeopods 1 and 2 very slender. 

 Peraeopods 3 — 5, 2^ Joint expanded, oval, peraeopod 5 the longest, its 

 6^^ Joint a little longer than 5*^, sparingly setose, finger rather shorter and 

 thin. Uropod 3, rami subequal, inner lanceolate, outer rauch narrower, 2-jointed, 

 2*1 Joint spiniform. Telson about twice as long as broad, little tapering, 

 cleft nearly ''^/^ length, inner point of bidentate apices the longer, each with 

 2 spines in the notch. Colour uniformly pale yellow. L. scarcely 7 mm. 



Arctic Ocean (Varangerfjord, depth 94 — 188 m; Storeggen; Jau Mayen; 

 ßarents Sea). 



2. I. pieta (Xorm.) 1889 Lilljeborgia p., A. 31. Xorman in: Ann. nat. Hist., 

 ser. 6 U.4 p. 116 t. 10 f. 5— 9. 



Pleon Segments 1, 2, 4 and 5 produced each into a dorsal tooth. Head, rostrum 

 small, lateral corners scarcely produced. Eyes (in fig.) oval, dark. Antenna 1 

 shorter than peduncle of antenna 2, flagellum with about 7 joints, accessory 

 flagellum with only 3, the last very minute. Antenna 2, ultimate Joint of peduncle 

 % as long as penultimate, flagellum a little longer than ultimate, 8-jointed. Mouth- 

 parts not described. Gnathopod 1, 5*^ Joint not produced, 6^^ widening gradually 

 from base, palm oblique, well arched, scarcely more than ^/g of total length 

 of Joint. Gnathopod 2, 5*'i Joint not produced, 6*^^ ovate, greatest width at 

 commencement of palm, which is slightly defined, a little longer than bind 

 margin. Peraeopods 1 and 2, finger little more than 7^ length of 6*^ Joint. 

 Peraeopod 5, 6*^11 joint slightly longer than 5*^ finger scarcely more than 

 V^ as long. Uropod 3, rami very broad and foliaceous. Colour pale with 

 markings of deep purple, a spot on ultimate Joint of peduncle in antennae 1 and 2, 

 the purple suffused over part of head, and most of peraeon, but on peraeopods 

 and the other parts in spots and blotches. L, 6 mm. 



English Channel (Guernsey). 



19. Farn. Oedlcerotidae 



1865 Subfam. Oedicerina, ~W. hWljehorg in: N. Acta Soc. Upsal., ser. 3 v.6 nr. 1 

 p. 18 I 1871 Subfam. Oedicerinae, A. Boeck in: Forh. Selsk. Christian., 1870 p. I6O; 

 1883 Oediceridae, 3. S. Schneider in: Tromso Mus. Aarsh., v.6 (p. 1) ! 1888 0., T. Stebbing 

 in: ßep. Voy. Challeuger, «.29 p. 835 | 1892 0., G. 0. Sai-s, Crust. Xorway, v.l p. 286 | 

 1893 Oediceridi, A. Della Valle in: fc\ Fl. Neapel, n20 p. 531. 



