56 



17. Notopterophorus micropterus, G. O. Sars, n. sp. 



(PI. XXVIII. 1.) 



Specific Characters. Female. Body comparatively more robust than in 

 N, papilio, and more resembling in shape that of N. auritns, being gently 

 curved, with the segments very sharply marked of from each other. Wing- 

 like expansions much reduced in size and conspicuously differing in shape from 

 those in both the said species. The foremost expansion, issuing from the 1st 

 trunkal segment, very slight, hood-like, with the edge entire, the 4 succeeding 

 ones each exerted behind in a single thread-like point, the hindmost expansion, 

 issuing from the end of the incubatory pouch, likewise simple, being exerted 

 to a narrow point somewhat curved downwards. Structure of the several ap- 

 pendages scarcely differing from that in the 2 preceding species. 



Colour of the living animal not yet ascertained. 



Length of adult female 4.10 mm. 



Remarks. Though this form looks very different from N. papilio, as 

 described and figured here, I am by no means fully convinced on its real 

 specific validity, and indeed I do not regard it as impossible, that on a closer 

 investigation it might turn out to represent only a peculiar variety of that 

 species. As I however have not found any decided transition between them, 

 I have found it advisable provisionally to record it as a separate species. 



Occurrence. Two female specimens only of this form have as yet come 

 under my notice. They were obtained in the same locality as the preceding species. 



Gen. 8. Gunentophorus, Costa, 1843. 



Syn: Sphaeronotus, Glaus. 



Generic Characters. Trunkal part of the body in female greatly inflated, 

 with the segments partly confluent, to form the large and prominent incubatory 

 pouch, the cavity of which is prolonged anteriorly over the 2nd and 3rd segments. 

 Head procumbent and well defined from the 1st trunkal segment, terminating 

 in a blunt rostral prominence. Tail nearly straight and only composed of 3 

 distinctly defined segments. Caudal rami curved outwards and armed at the 

 tip with small denticles. Anterior antennae very short and compressed, with 

 the joints imperfectly defined. Posterior antennas distinctly prehensile. Man- 

 dibles well developed. Maxillae with the endopodal part transversally truncated 

 and without any terminal joint. Posterior maxillipeds much reduced, uniarticulate. 



