288 Canon A. M. Norman — Notes on 



The specimens from the mainland near Guayaquil do not 

 appear to differ at all from those obtained on Pun;! Island. 



This Marmosa has some resemblance to Tomes^s M. Water- 

 Jiousei, but that is said to have a pouch in the female and 

 came from the eastern side of the Andes at Gualaquiza. 



I have named this pretty opossum, the first-fruit of 

 Mr. Simons's Ecuadorean trip, in his honour, in recognition 

 of the collecting powers he has shown bith in Mexico (where 

 he obtained a number of new mammals described by 

 Dr. Allen and myself) and now in Ecuador. 



XXVIII. — Notes on Montagu's Hunting-ground, SaJcomhe 

 Bay. By the Rev. Canon A. M. Norman, M.A., D.C.L., 

 LL.D., F.R.S., &c. 



[Plate V. figs. 1, 1 «.] 



Pereionotus iestudo (Montagu). (PI. V. figs. 1, la.) 



1808. Oniacits testudo, Montagu, Trans. Linn. Soc. vol. ix. p. 102, pi. v. 



fig. 5. 

 1862. Pereionotus testudo^ Bate & Westwood, Brit. Sessile-eyed Crust. 



vol. i. p. 228. 

 1862. Pereionotus testudo, Bate, Cat. Amplaip. Crust, in Brit. Mus. 



p. 375. 

 1864. Icridium ftiscum, Grube, " Beschr. einiger Amphipoden der 



Istriclien Fauna," Arch.f. Naturg. 30 Jalirg. p. 209, pi. v. fig. 3 a-/. 

 1893. Pereiovotns iestudo, Delia Valle, Faun, uud Flor. des Golfos von 



Neapel, Gammarini, p. 559, pi. iii. fig. 7, pi. xxxi. figs. 1-19 p. 

 1899. Pereionotus testudo, Stebbing, " Amphipoda from the Copen- 

 hagen Museum and other sources," Trans. Linn. Soc, Zool. ser. 2, 



vol. vii. p. 417. 



Pereionotus testudo is a very remarkable Amphipod, with 

 the metasome (or pleon) much reduced in proportion to tiie 

 mesosome (or perseon), and, moreover, theepimera are outspread 

 and horizontal instead of, as usual, nearly vertical ; the whole 

 form is thus depressed instead of compressed as in ordinary 

 Amphipoda, and it is not therefore to be wondered at that 

 Montagu assigned it to Oniscus and not to Gammarus. 



Montagu [)rocured his type at Salcombe, and when Bate 

 and Westwood were publishing their work this type was 

 fortunately found to be in the British Museum. From it 

 their figures were taken, and are very characteristic drawings 

 considering that they were made from a specimen which had 

 Ijeen preserved dry for fifty-four years. 



As yet the species has not been met with in any other p^-t 



