Famity—TROGULIDA. 201 
Famity—CRY PTOSTEMMID.. 
The Genus Cryptostemma of Guérin-Méneville is formed of a single species received by M. Guérin from 
the late Herr Westermann as a native of Guinea. 
It is nearly allied to Phalangium and Trogulus, but the eyes are wanting and the chelicere are porrected 
and pediform ; the cephalothorax is square, with the anterior margin porrected in form of a clypeus; the abdo- 
men is as wide as the cephalothorax, and twice its length, being oblong, with the posterior angles rounded. 
The legs are very unequal in length, the second pair being the longest, with 4- or 5-jointed tarsi (Guérin-Mén. 
Rey. Zool. 1838, p. 11; Dict. Pittor. d’Hist. Nat. pl. DXXXIX, fig. 7; Walckenaer, Apt. i. p. 131, pl. XLVI 
(not XX XIX), fig. 4). 
An allied form was captured by Mr. H. W. Bates in his Amazon researches, which constitutes a distinct 
genus, which I have named 
Grnus—CRYPTOCELLUS. 
Corpus breve depressum; abdomine fere circulare et plano; oculi vel ocelli obsoleti; cephalothorax antice 
labro distincto, mobili, verticali instructus, os omnino claudenti; os in cavitate antica oecultans, cheliceris duabus 
minimis (fig. 5), margine interno chelarum denticulato, interna breviore intus dente medio majori armata. 
Palpi cum sterno segmenti, pedes anticos gerentis, arcte coaliti, 4-articulati, articulo secundo minuto, tertio et 
quarto longitudine fere equalibus, ultimo graciliori ad apicem ungue parvo instructo (fig. 5, os cum labro 
elevato, cavitatem oralem, palpum et basin pedis primi paris ostendenti); dorsum cephalothoracis breve-obova- 
tum, subconvexum, linea longitudinali media depressa notatum; abdomen quasi e segmentis 4 compositum, 
primo brevi; tribus ultimis fere equalibus, apice tuberculo parvo (ano?) aperto instructo; pedes 8 mediocres, 
primi paris breviores, secundi paris longiores, tarsis anticis l-articulatis; secundi et quarti paris, 5-articulatis ; 
tertii paris 4-articulatis; articulo ultimo compresso apice truncato et profunde impresso, unguiculis duobus 
in margine supero impressionis affixis, coxis pedum singuli paris planis, in medio coalitis, sternum formantibus. 
Species 1—CRYPTOCELLUS FQCEDUS. 
Prats XXXVII, Fie. 5. 
Totus fuscus, obseurus: cephalothoracis margine, margineque abdominis parum elevato ; segmento secundo 
abdominis supra impressionibus duabus parvis discoidalibus lineaque laterali obliqua, ex angulo antico laterali 
prodeunte, notato; segmentis duobus ultimis longitudinaliter inter medium et latera biimpressis ; pedibus 
paullo setosis. 
Long. corp. lin. 25. 
Habitat ; Amazonia (Bates), In Mus. Hopeiano Oxonie. 
Famity—TROGULID&. 
Genus—TROGULUS. 
It is with great pleasure that I am here enabled to introduce this interesting Genus into the British Fauna, 
a new species having been captured in Dorsetshire by the Rev. Pickard Cambridge, who has kindly placed 
it in the Hopeian Collection, and allowed me to describe and figure it in this work. 
The Genus is composed, for the most part, of European species, the type being the Phalangium tricarinatum 
2D 
