^Ir. I.. A. Umiailailc — Aofes on Carida.i. L'l).') 



XIV. — Notes on Carides. By L. A. Ijokkadaili;, >M.A., 

 Lecturer cm Zooloi^y in the University of Cambridge ; 

 Fellow, Dean, and Ijfctiirir of Sclvvyn College. 



During tlie investi<;ation of certain collections of prawns 

 frtnn tlie linlo-l*acilic rcf^ion I liave arrived at the following 

 conclusions, which appear to be worth putting on record in a 



prelimiiinrv •statcmiMit. 



1. Tin: Craxgoxoida. 



The bounds of this suj)erfamily must be enlarged to admit 

 the genera Anchistioidrs^ Tanlson, 1875, Am/i/ii/xdfemoTi^ 

 Nobili. 1001, and Ili/menncera, hntv. This addition involves 

 two concessions in the definition of the group : (1) if Anc/ii- 

 stioldes and Aitij)Jiip(da'nion are to be admitted, it can no 

 lonjier be stated tliat the mandible is always without incisor- 

 process; (2) the inclusion of Hymenocera makes it necessary 

 to allow the persistence of a small representative of the outer 

 lacinia of the maxilla. 



Auc/iislioides and Amphipahemon constitute a new family, 

 the Anehistioidida?, intermediate between the C'rangonoida 

 and the Fala^monoida. The princi|)al characteristics of this 

 family are : (1) a well-ileveloped, coni[)ressed, toothed ros- 

 trum ; (2) a short, thick, accessory flagellum on the an- 

 tennule ; (3) a deeply cleft mandible without palp ; (J:) the 

 absence of " laciniie" from the maxilla ; (5) the absence of the 

 exopodite from the third maxilliped; (0) 'aw appendix interna 

 on the tirst abdominal limb ; (7) considerable variability in 

 the armature of the telson ; (ii) a gill-t'ormula consisting of 

 pleurobranchs for the leg*, an arthrobranch for the third 

 maxillij)ed, and cpipodites (mastigobranchs) on the maxil- 

 lipcds. 



IJ fjmenocera is shown by its mouth-parts to belong to the 

 Gnathophy lliuaj. The species described by Baiss as II. cerat- 

 ophthahna deserves to become the type of a new genus. I 

 have allied this genus Phyllognathia, and placed it also in 

 the Gnathophyllidjp. The j)rincipal characteristics of that 

 family are now as follows : — (1) a compressed dentate ros- 

 trum ; (2) the outer tiagellum of the antennule thick at the 

 base and clett tor a very short distance ; (3) the mandible 

 simple, slender, curved, j)ali)les8 ; (4) the inner "lacinia*' of 

 the maxilla lost, the outer either lost or very small but still 

 cleft ; (5) the third maxilliped with exopodite, simple mastigo- 

 lirancli, and endopodite of four joints, some or all of which 



