﻿Tlic Sympoda. 159 



allows the inclusion of another, Stcnotyphlops, in which, however, 

 only the female is at present known. The last is distinguished from 

 its companions by having only one seta or apical filament on the 

 palp of the first maxilla, and both the new genera are distinguished 

 from Lamprops, Sars, 1862, by their blindness. 



PLATYTYPHLOPS, n. g. 



Carapace broad, depressed, eyelobe devoid of visual elements, 

 pleon slender, telson carrying three apical spines. First antenna 

 with the flagella long and nearly equal. Second antenna of female 

 four-jointed. First maxilla with bisetose palp. In the male the 

 first four pairs of peraeopods have exopods ; in the female the first 

 two pairs are similarly furnished, but the third and fourth pairs have 

 only microscopic rudiments of them. Fifth pair of peraeopods 

 rudimentary. Pleon in both sexes without pleopods. 



The generic name is derived from izXaruQ, broad, in allusion to 

 the character of the carapace, resembling that in the Platysympodid<E, 

 and Tv<p\w\p, blind-faced, to emphasise the fact that this is a blind 

 genus in the family Lampropidse, of which the typical genus was 

 named from the brightness of the eyes. 



The comparatively large size of the specimens for which the genus 

 is instituted makes it very improbable that the want of pleopods in 

 the male and the dwarfed, apparently functionless, fifth peraeopods 

 in both sexes, could be juvenile characteristics. Nevertheless, it 

 had to be borne in mind that the specimen, 7b mm. long and 

 apparently adult, for which Sars instituted Leptostijlis manca, was 

 entirely devoid of fifth peraeopods, and yet a specimen, 10"5 mm. 

 long, was subsequently found by Dr. Zimmer to be provided with 

 the limbs in question well developed (see Hamburger Magahaensische 

 Sammelreise, Cumaceen, p. 9, 1902). Fortunately, however, in the 

 present case doubt is to a great extent dispelled by the presence in 

 the collection of a fragmentary specimen containing eggs in the 

 marsupium, yet with the diminutive appendages on the fifth 

 pedigerous segment. 



Platytyphlops peringueyi, n. sp. 



Plates LVIII., LIX. 



Pseudorostral lobes short, upturned. Carapace rounded oval, a 



little longer than broad, the margin forming a sharp carina all round, 



fringed with microscopic pellucid overlapping scales. The sightless 



ocular lobe small, triangular; the frontal lobe broad: the medio- 



