4J.0 ME. G. -AI. THOMSON ON THE NEW ZEALAND 



FainUy HIPPOLYTID.E. 



Genus 1. Alope, White, 1817. 



1847. ■\Vliite, Proc. Zool. Soc. p. 123. 



1848. White, Ann. & Mag. Nat. Hist. ser. 2, vol. i. p. 225. 

 1876. Miers, Cat. N.Z. Crust, p. 84. 



Cai-apace smooth, with a supraorhital spine and a suborhital tooth on each side, 

 liostrum short, armed with teeth above, and springing from a deep groove. 



Ophthalmopoda short, stout ; ocellus well developed. 



Eirst antennae short, Avith two flagella. 



Second antennae with a large scaj)hocerite and a very long flagellum. 



Mandible with shortened cutting-tooth (psalistoma) and a three-jointed palp 

 (synaphijiod). 



First luaxillae 2-branched ; second j)air 3-branclied, aa ith wide mastigobranchial j)late. 



Eirst maxillipeds with a 2-lobed mastigobranchia. 



Second maxillijieds with a short podobranchial plume. 



Third maxilliiieds very long and pediform, without any trace of branchiae. 



First pereiopoda strong ; chelae well developed. 



Second pereiopoda very slender, long, and minutely chelate; carpos 7-articulate (or 

 i)-articulate) *. 



Third to fifth pereiopoda slender, with bifid dactylos. 



Telson long and narrow. 



The branchial formula is as follows : — 



h i 7c 7 m n o 



Pleurobranchise .... — — 1 1 1 1 1 



Poflobranchia 1 — — — • — — — ■ 



Mastigobrancliife ... — r r r r r r 



The mastigobranchiae are extremely rudimentary, consisting of a minute tubercle with 

 a mere trace of a plume. 



Miers placed this genus in the Alpheidtr, but its distinct rostrum, exposed ophthal- 

 mopods, mandibles with reduced j)salistoma, the symmetrical first pereiopods, and 

 narrow tapering telson lead me to include it among the Hippolytidae. 



1. Alope palpalis. White. (Plate 28. figs. 3-12.) 



1847. White, /. c, &c. 



1874. Miers, Zool. 'Erebus' & 'Terror,' Crust, p. 4, pi. 4. fig. 1. 



The carapace is broad, widening posteriorly ; in front it bears a 4-toothed slender 

 rostrum, two teeth being near the point of origin, and two on the distal portion ; the 

 lower margin is entire. On each side of the rostrum, and about half its length, stands a 



* See specific description, p. 441. 



