176 [October, 



perbreves, subaequi. Antennae externae corporis dimidio paulo breviores, fla- 

 gello lO-J2-articulato, breviore quam basis, nudo. Long. 5i'". 



Spijerillo affinis, D. Corpus superficie laeve et innotatum. Antenna? sub- 

 tilissime scabriculae, articulis duobus ultimis conjnnetis (6to 7moque) 5to parce 

 brevioribus. Seumentum abdominisultimum paulo transversum, medio constrie- 

 tum. Slyli caudales lati, latitudine basali non longiores, angulo interno-postiore 

 late excavato, lateribus antico posticoet externo fere rectis et inter sese rectan- 

 gulatis, angulo interno-anteriore truneato, externo-anteriore rotundato, ramo 

 posteriore minuto, parce exserto. Long. 4a"'. 



Porcellio gemmulatus, D., Rep. Crust. Exp. Exp. p. 725, pi. 47, f. 7. 



Styloniscus gracilis, D. Corpus gracile. Abdomen paulo oblongum, sub- 

 ovatum, thorace postico subito paululo angustius, segmentis 3tio 4to 5toque 

 lunatis. Styli caudalis basis brevis, vix duplo longior quam latus, extus ad 

 medium subito angustior. Antennae externae fere nudae, rlagello fermel4-articu- 

 lato, nudo, articulos basis duos precedentes longitudine fere aequante. Long. 

 5'". 



As in other species of this genus, the outer antennae have not the double geni- 

 culation characterising the Oniscidas. The surface of the body is smooth; yet 

 there are a few exceedingly minute hairs especially along the posterior margin of 

 the segments of the abdomen. The branches of the caudal stylets in the speci- 

 men are mutilated. 



Genus ALLONISCUS, D. Seyphacidis affinis, extremitate mobili maxilli- 

 pedis oblonga et lobata, lobis setulosis ; antennis externis, non 2-geniculatis. 

 Processus apicalis maxillipedis crasse elongatus. Styli caudales breves, articulo 

 basali ad marginem segmenti abdominis posticum adnato et fere transverso. An- 

 tennae externae 8-articula'tae. Oculi parvi. 



This genus is between Scyphax and Styloniscus in most of its characters. 

 Eut the apical process of the maxillipeds is large, as in Oniscus. Moreover, 

 the bases of the caudal stylets form a border to the last abdominal segment, so 

 that the apices of the two are brought nearly together. 



Alloniscus perconvexus, D. Corpus valde convexum, subtilissime subgra- 

 nulosum, fere laeve. Antennae externae subtiliter scabriculae, articulis tribus ul- 

 timis subaequis, articulo precedente non longioribus. Abdomen paulo transver- 

 sum. Ramus terminalis styli caudalis basi brevior. Pedes infra spinulosi. 

 Long. 6-2-'". 



Both the back and the legs in the specimens are brownish black, fn some 

 smaller specimens four to five lines long ; the color is light brown, mottled with 

 yellowish, and the legs are pale yellowish ; the form is a little more slender, 

 and they may probably be a different species. The last three joints of the outer 

 antennae are not so nearly equal. 



Lygia occidentalis, D., Rep. Crust. Exp. Exp., p. 742, pi. 49, f. 7. 



^Ega micropthalma, D. Oculi subrotundi, parvuli. Corpus superficie nudum, 

 laeve. Antennae externae longiusculae, fiagello ferme 24-articulato ; interna? basi 

 externarum breviores. Pedes fere nudi ; antici breves, articulo 4to 5-6 denti- 

 bus spiniformibus brevissimis infra armato ; 8 postici breves, apice articulorum 

 spinulosi. Abdomen 4-articulatum, segmento postico triangulato apice rotun- 

 dato et pubescente, lateribus recliuculis. Styli caudales spina, tenui et longa 

 ramis parce breviore ad basin armati ; ramis abdomen vix superantibus, breviter 

 ciliatis, interne lato, apice oblique leviter arcuato, externo dimidio angustiore, 

 breviter lanceolate. Long. 6'". 



The six epimerals either side are large, and excepting the two anterior, they 

 project behind, beyond the segment to which they belong. The eight hinder 

 legs are naked, excepting the spines at apex and one or two sets of minute 

 spines on the under side of some of the joints. 



Genus iEGACYLLA, Dana. JEgce affinis. Thoracis seirmentum septimum 

 breve et pedibus carens. Oculi permagni. Antennae, sex pedes antici, stylique 

 caudales ac in JEga. 



