NATURAL SCIENCES OF PHILADELPHIA. 
163 
DORIPPID^. 
270. DoRippE QiJADRiDENS, Fabr. ; Suppl. 361, De Haan ; Fauna Jap. Crust. 
121, pi. xxxi. f. 3. — In portu " Hong Kong" in fundo limo-sabuloso prof, sex 
org. 
271. DoRiPPE FACCHiNO, Do Haan ; Fauna Jap. Crust. 123. Cancer facchino. 
Herbst. ; loc. cit. i. 190, pi. xi. f. 68. D. sima, M. Edwards ; Hist. Nat. des 
Crust, ii. 157, pi. f. 11. (non Dana; Exp. Exp. Cr. i. 398.) — In mari Sinensi 
prope "Hong Kong" ; in fundis arenosis et limosis prof. 6-30 org. vulgaris. 
272. DoRippE Japonica, Von Siebold ; Spicilegia Faunse Japonicse, p. 14. 
De Haan; loc. cit. 122, pi. xxxi. f. 1. — In sinu "Hakodadi." 
273. DoRipPE GRANULATA, De Haan ; loc. cit. 122, pi. xxxi. f. 2. — In sinu 
" Hakodadi" Japonise ; fundo limoso prof, sex org. Etiam prope oras orien- 
tales insulse " Nipbon," ad prof. org. 30 ; et in portu "Hong Kong" Sinensi. 
274. DoRippE SEXDENTATA, nov. sp. Parvula. Carapax sat elongatus, 
superficie insequalis, non granulatus. Frons interocularis quadridentata, den- 
tibus acutissimis subsequalibus. Fissurse supra-orbitales profundissimse, tri- 
angulato-apertse. Dentes extra-orbitales graciles acuti, quam dentes frontales 
minus prominentes. Dens infra-orbitalis obsoletus. Pedes graciles, cylin- 
drici, asperi, penultimi ultimique paris fere simplices. Abdomen maris nec 
tuberculosum nec nodulosum. $ Carapacis long. 0-275 ; lat. 0*242 poll. 
Hab.—Iu sinu " Kagosima" Japonise Australis ; fundo concboso prof . org. 20,. 
Tymolus, nov. gen. Carapax oblongo-rotundatus, antice contractus, forma 
fere ut in Homola; regione faciei angusta, prominente. Regiones hepaticse 
brancbialesque amplse, tumidse. Apertura branchialis afferens position© 
normalis, ad basin cbelipedum. Frons quadridentata. Dens medianus mar- 
ginis arese buccalis antice inter dentes medianos frontis superne visus. Oculi 
parvi, longitudinaliter protractiles. Orbitse profundas, superne profunde in- 
terruptge, dente in hiatu inferiore armatse ; biatu interno magno. Antennulse 
sat longse, biatum internum orbitarum occupantes ; fossis nuUis. Antennae 
externse breves, infra antennulas sitae, articulis distinctis. Maxillipedes externi 
parum Mantes, valde elongati, maxillipedes internes in totum tegentes ; en- 
dognathi mero quam ischium latiore, apice acuto ad vel ultra frontis marginem 
producto ; palpo ut in Leucosideis celato ; exognatbo angusto, ischium en- 
dognatbi vix longitudine superante. Pedes ambulatorii eis Dorippes fere 
similes, dactylis vix falciformibus, non sulcatis. Abdomen sex-articulatum., 
ei Dorippes simile, segment© ultimo dilatato. 
275. Tymolus Japonicus, nov. sp. Carapax distincte areolatus, subtiliter 
granulatus, latere tridentato, dente primo majore ad angulum hepaticum. 
Dens validus in regione subhepatica. Dentes frontales parvi sed acuti, me- 
diani prominentiores. Chelipedes maris asperi ; carpo ad apicem unispinoso, 
manu brevi, alta, digitis magnis, palma longioribus, intus concavis. Pedes 
ambulatorii graciles. % Carapacis long. 0*235 ; lat. 0*24 poll. 
Hah. — In sinu " Hakodadi" insulse '• Jesso" Japonise ; e fundo concboso ad 
profunditatem octo orgyiarum lectus. 
July 6th. 
Yice-President Bridges in the Chair. 
Twenty-four members present. 
A paper entitled '^Descriptions of twelve New Species of Uniones, 
and other Fresh-water Shells of the Uuited States, by Isaac Lea/' was 
presented for publication in the Proceedings. 
Dr. Le Gonte stated, in regard to the small collection of Coleopterous Insects 
of Japan presented this evening by Dr. A. A. Henderson, U. S. N., that seYerai 
1858.] 
