G. 0. SARS. 



[No. 8. 



above, terminal section very large, laniellar, scarcely however 

 dilated towards apex, dorsal edge gently arched and terminating 

 Avith a well-marked angle, lateral spines very slender, increasing 

 in length towards apex, about 20 on either side, exclusive of 2 or 

 3 small denticles, obliquely disposed in a series at base of each 

 spine. Apical claws slender and well-nigh straight, without any 

 secondary tooth at base. — Male much smaller than female, with 

 antennulæ larger and Ist pair of legs armed with a strong hook. 

 Body of female amber-coloured. Length of full-grown female 

 0,84 mm, of male 0,46 mm. 



Kemarks. — This species, although very similar in its 

 general habitus to the 2 European forms, — L. acanthocercoides 

 Fischer, and L. quadrangularis Leydig, can at once be dis- 

 tinguished by the remarkable development of the eye-spot. It 

 may also be easily recognized — at least from the species oc- 

 curring in Norway (L. quadrangularis) — by a somewhat dif- 

 ferent form of the terminal section of the tail, as also by its 

 apical claws being wholly unarmed. 



Description of the Female. — The length of the full- 

 grown female measures 0,84 mm; and this animal ranks ac- 

 cordingly among the larger forms of Lynceidæ. 



The body (see Pl. 7, figs 1, 2) occurs, as- in the other two 

 species. much compressed, its breadth scarcely attaining half 

 its height. 



The head (see fig. 1) is comparatively erect, with the dor- 

 sal contour gently curved to the very apex of the rostrum. The 

 edges of the fornix appear slightly flexuous, and join the cara- 

 pace at a very acute angle. Yiewed from beneath (fig. 2), 

 the head, owing to the greatly developed fornix, assumes the 

 form of an obtusely triangular vaulted shield, posteriorly about 

 as broad as the carapace.fjgThe rostrum, fornied, in a strict 

 sense, by the edges of the fornix running together in front, 

 appears, when viewed from the dorsal or ventral face, obtusely 

 rounded. 



The carapace, viewed laterally (fig. 1), is very broad, and 

 irregular-quadrilateral in form, the ventral side being by far 



