1878.] MR. E. J. MIERS ON THE PEN.EIDJJ. 299 



T>*?6"™839) rS ' inatU '' KaUda11 ' J ° Um - AC - Nat - ScL PhiK viii - 

 ^Penmts plebejus, Hess. Arch. f. Nat. p. 168, pi. vii. fig. 19 



The series in the British-Museum collection includes specimens 

 from the Gulf of Suez, Shanghai, Yokohama (Japan), Torres S Si 

 Shark Bay, Houtmann's Abrolhos, Sir-C.-IIardy Island, and he 

 Loyalty Islands (Lift,). In both sexes there is a single spine on he 



tSn JOint n° f the ? rSt v aUd , SeC ° nd P airS °f legs, and none on h 

 third pair of legs. In the closely allied Europea & n P. caramote there 

 is, besides these spines, a spine upon the first joint of each of the 

 fi st three pairs of legs. The sixth postabdominal segment i not 



saataE^ iu both the terminai sesmeut is a ™ ed 



Penjeus brasiliensis. 



£ 't ); M x T ' Ed ^. H,St - Nat - Crust " "• P- 4]4 (1837): Stimpson 

 Ann. Lye. Nat. Hist. New York, x. p. 132 (1871). oam P 80n > 



V Thl t ! P ri eS ^ e ? ten,al charact ers closely resembles the prece- 

 ding, but differs m the following particulars :-There is a spineCon 

 the second and third joints of the first pair of legs, oneuZ fce 

 second join of the second pair of legs, and none upon the third pah 

 of legs The sixth postabdominal segment is grooved on either S 

 of the longitudinal median carina on its upper surface. There are 



" g meT S ° D kteral marSiQS ° f the Mh Po^abdominal 



Specimens from Whydah on the west coast of Africa aeree in all 

 respects with authentic specimens from Brazil presented by th 

 J™, Mu *eum, and with specimens from the West Indies (Barba- 

 does) and North America, proving that this, like many other species 

 occurs on both sides of the Atlantic. species. 



Pen^us semisulcatus. 



P l P xlvrfiVT0849r De Haan ' FaUn " JaP ° n - CfUSt - P - l9h 

 A large series of specimens of both sexes is in the Museum collec- 

 tion agreeing with De Haan's description and figure. It is probable 

 that under he Fabrician name of P. m0 nodon two closely allied 

 Jut apparently distinct species were confounded by earlier authors 

 £lnw S t ? U 7 ™ the ros t r T- is 7 -8"toothed above and 3-toothed 

 2 e d ° rsal car,na > whleh « "y or obsoietely canaliculated, 

 £2 to the posterior margin of the carapace, and the gastro- 

 hepatic sulcus ls faintly defined. There are examples from India 

 (Pondicherry Calcutta), Formosa, the Philippines, North Australia 

 and the Fiji Islands (Mbau), in the Museum collection. 



In two specimens from Australia (Shark Bay), and one from Cey- 

 lon, the rostrum is 6-/ -toothed above, the teeth toward 1 he apex 

 separated by much W1 der intervals than in the specimens referred to 



