rami provided with the usual number of setae. Antennae attached close together, 

 the anterior ones slender, multiarticulate, the posterior ones much smaller and 

 not prehensile. Oral parts imperfectly developed, except the posterior maxillipeds, 

 which are of a very peculiar structure and apparently prehensile, terminating 

 in a narrow and very mobile digit minutely clawed at the tip. Only 3 pairs 

 of legs present, all very imperfectly developed, forming small and simple tri- 

 angular lamellae without any armature whatever. 2 ovisacs present in female 

 attached to the sides of the genital segment. 



Remarks. It is very questionable, if this remarkable genus at all is refer- 

 able to the Notodelphyoida, and it is only provisionally recorded here, as I 

 am at present unable to determine with certainty its true systematic position. 

 In any case it ought to be regarded as the type of a quite distinct family, 

 Anomopsyllidce. The genus is founded on a single species, to be described below. 



30. Anomopsyllus pranizoides, G. O. Sars, n. sp. 



(PI. XXXVII, 2) 



Specific Characters. Female. Body moderately slender, exhibiting in its 

 general outline a perplexing similarity to a Praniza. Head rather small and 

 produced in front to a beak-like prominence, its lateral edges abruptly curved 

 behind. Trunk oblong oval in form, somewhat narrower in front than behind, 

 posterior extremity very slightly emarginated in the middle, with the lateral 

 corners evenly rounded off. Tail scarcely exceeding in length Y 5 of the trunk, 

 and apparently only composed of 3 segments, the 1st, or genital one, being 

 rather tumid at the base; anal segment larger than the middle one and not 

 dilated distally. Caudal rami narrow, sublinear in form, and considerably diver- 

 ging, being about as long as the anal segment, each carrying at the tip 4 

 setae, the 2 middle ones rather slender and abruptly bent outwards, the other 

 2 very small; seta of outer edge attached about in the middle. Anterior an- 

 tennae comparatively slender and attenuated, fully attaining the length of the 

 head, and composed of 7 joints clothed with a few slender setae. Posterior 

 antennae scarcely exceeding in length V 3 of the anterior, and composed of 3 

 nearly equal-sized joints, the last one tipped with a number of somewhat un- 

 equal setae. Oral area exhibiting in the middle a rather wide hollowed space 

 limited in front by a slightly curved projecting border, probably answering the 

 anterior lip, and behind by a narrow oblong triangular plate (metastome). 

 Mandibles and maxillae undistinguishable, being replaced by an irregularly 

 twisted chitinous frame limiting the above-mentioned hollowed space on each 



