40 PROCEEDINGS OP THE ACADEMY OP 
CORYSTOIDEA. 
133. Trichocera gibbosula, De Haan ; loc. cit. p. 45, pi. ii. f. 4. et pi. xiii. 
f. 3. In mari prope oras orientales insuljB " Mphon" ; fundo arenoso prof. 
30 org. 
134. Kradssia nitida, nov. sp. Carapax suborbicularis, nitidus, psene Isevis, 
obsolete lineolatus. Frons interantennalis valde prominens, media profunde 
fissa, bilobata, lobis profunde excavatis ; margine ciliato. Margo orbitalis 
superior fissura valida. Margo antero-lateralis ciliata, minute crenulata, in- 
cisuris inconspicuis tribus v. quatuor dentes significantibus. Chelopoda vix 
rugulosa. % Carapacis long. 0*32 ; lat. 0*36 poll, DifFert a K. integro carapace 
augustiore et fronte magis iDrominente ; a K. rugulosa et porcellana spinis later- 
alibus nullis. 
Hah. — In mari Sinensi Boreali et in sinu " Kagosima" ; fundo arenoso prof. 
20-24 org. 
135. Cheirogonus acutidens, nov. sp. C. hippocarcinoide, serratoque affinis, 
sed dente laterali v. majore longo, graciliore ; post quam dente parvulo inter- 
medio. % Carapacis long. 1*45 ; lat.. (inter apices dentium) 1'83 poll. VbI- 
gariter duplo major. 
Ilab. — In sinubus freti " Tsugar" inter insulas " Jesso" et "Niphon." 
136. Nautilocorystes ocellatus, M. Edwards ; Hist. Nat. des Crust, ii. 149. 
Dicera octo-dentata, De Haan, Krauss. Ad Promontorium Bonse Spei in sinii 
" Simon's Bay" ; fundo arenoso prof. 12 org. 
Descriptions of New Species of Unio, from Tennessee, Alabama and North. 
Carolina. 
BY ISAAC LEA. 
Unio turgidulus, — Testa Ijbvi, elliptica, subaequilaterall, ad latere vel paulis- 
perplanulata vel impressa ; valvulis crassis, aatice crassioribus, natibus tiimidis, 
subelevatis incurvisque ; epidermide luteo-olivacea, crebre virido-radiata ; 
dentibus cardinalibus subgrandibus, elevatis, sabconicis, crenulatis, in utroque 
valvulo duplicibus ; lateralibus curtis, subcrassis subrectisque ; margarita alba 
et iridescente. 
Hab. — Cumberland River, Tennessee, Dr. Troost and T. C. Downie. Florence, 
Alabama. Rev. G. White. 
Unio perradiatus. — Testa laevi, subtriangulari, inflata, postice obtuse biangu- 
]>»ta, subinEequilaterali ; valvulis crassiusculis, postice crassioribus; natibus 
subgraadibuj, tumidis et incurvis ; epidermide nitida, lutea et tota virido-ra- 
diata; dentibus cardinalibus parviusculis, valde crenulatis; in utroque valvulo 
duplicibus; lateralibus sub brevis, lamellatis subcurvisque ; margarita alba et 
iridescente. 
Hab. — Florence, Alabama. Rev. George White. 
Unio Mrredithii. — Testa sulcata, subtrigona, vald corapressa, postice obtuse 
angulata, inajquilaterali ; valvulis subcrassis, antice crassioribus ; epidermide 
crocea ; dentibus cardinalibus subcrassis, crenulatisque ; lateralibus crassis. 
curtis subrectisque ; margarita subcrocea et iridescente. 
Bab. — Tennessee River, Florence, Alabama. L. B. Thornton. 
Unio Pybasii. — Testa lasvi, elliptica, iuflata, postice obtuse angulata, in^equi- 
laterali ; valvulis subcrassis; natibus prominulis ; epidermide tenebroso fused, 
obsolete radiata ; dentibus cardinalibus submagnis, obtuse angulatis, crenu- 
latis ; lateralibus longis, lamellatis curvisque ; margarita vel alba vel salmonis 
colore tincta et valde iridescente. 
Hab. — ^Tennessee River at Florence, Alabama. B. Pybas. 
Unio virescens. — Testa laevi, elliptica, subinflata, postice angulata, valde; 
inaequilaterati ; valvulis subtenuibus, antice crassioribus ; natibus prominulis : 
epidermide nitida, luteo-viridi, obsolete radiata, antice tenebrosa; dentibus, 
[March., 
