238 MR. E. J. MIERS ON THE OXYSTOMATOUS CRUSTACEA. 



Sab. Western Australia, Shark's Bay. 



This species is at once distinguished by its colour and the group of red granules on 

 each side of the carapace. Specimens of both sexes are in the collection. 



6. Letjcosia whitmeei. (Plate XXXVIII. figs. 16-18.) 

 Leucosia whitmeei, Miers, Ann. & Mag. Nat. Hist. xvi. p. 342 (1875). 



This species was described by me in 1875 from a specimen from Samoa, presented by 

 the Rev. S. J. Whitmee to the Trustees of the British Museum. Specimens are in the 

 national collection, from Ovalau in the Fiji Islands, which probably belong to this 

 species, with which they agree in structural characteristics ; but all traces of the original 

 coloration and markings of the carapace have disappeared. 



7. Letjcosia pekryi, sp. n. (Plate XXXVIII. figs. 19-21.) Carapace rather depressed, 



with a continuous beaded line defining the lateral and posterior margins, and with 

 a slight longitudinal median ridge between the hepatic regions. Pront tridentate, 

 not concave above. Thoracic sinus entirely absent. Anterior legs rather slender ; 

 arm closely tuberculated above and below at and towards the base ; wrist and hand 

 smooth, hand rather compressed, but not keeled or beaded; fingers, when closed, 

 meeting only at tips. Abdomen of male narrow, triangular, with the sides straight, 

 and with a slight tubercular prominence on the penultimate segment. Colour of 

 carapace deep brown, with two or three small, irregular, paler spots in front of the 

 branchial regions ; arms greyish; hands and ambulatory legs paler brown. Length 

 •§ in. ; breadth about \ in. 

 Sab. Western Australia, Shark's Bay. 



This species is distinguished from all others of the genus having a tridentate front by 

 the entire absence of the thoracic sinus. In this respect it resembles L. orbicularis, Bell ; 

 but this species has the front much less produced forward, with the anterior margin 

 concave. I have named it in honour of its discoverer, W. Wykeham Perry, Esq., by 

 whom it was presented to the Trustees of the British Museum, with three others of the 

 new species described in this paper *. 



8. Letjcosia ptjbescens, sp. n. (Plate XXXVIII. figs. 22-24.) Carapace convex, 



smooth and polished ; anterolateral margins with a finely beaded line, which does 

 not extend beyond the commencement of the posterolateral margin. Hepatic 

 regions concave. Pront tridentate, flat above. Thoracic sinus with its anterior 



* The folio-wing is a list of the species of Crustacea (besides several interesting specimens too young for deter- 

 mination) that have been presented by Mr. Perry to the collection of the British Museum : — 



Lambrus nodosus. Geograpsus crinipes. Matuta obtusifrons, sp. n. 



Neptunus sanguinolentus. Sesarma obesum. Galappa hepatica. 



Caphyra rotundifrons (young). S. quadratum. Bemipes patiftcus, 



Gelasimus annulipes, var. Leucosia reticulata, sp. n. Squilla armata. 



G. gaimardi. L. perry i, sp. n. 



Grapsue pietus. Matuta crebrepunctata, sp. n. 



