60 Addison E. Verrill, 



CARIDEA (Dana) or PHYLLOBRANCHIATA. 



Caridea Dana, Crust. U. S. Expl. Exped., 1852. 



Eucyphidea Ortmann, Syst. der Decapoden-Krebse, Zool. Jahrb., 1896. 

 Normalia Bate, Macrura, Voy. Challenger, vol. xxiv, p. 480, 1888. 

 Caridea M. J. Rathbun, Brach. and Macrura of Porto Rico, p. 104, 1901. 

 Stebbing, Hist. Crust., p. 224, 1893. 



This extensive group, which includes about fifteen families, 

 corresponds precisely with the division named Caridea by Dana in 

 1852. Therefore there seems to be no good reason for adopting 

 either of the later names. Six of the families are found in 

 Bermuda. 



The most important character, probably, is the nature of the 

 gills. The branchial plumes are lamellate, composed of thin, 

 foliaceous laminae, attached to a central stem. The legs of the 

 third pair are never chelate ; those of the first and second pairs are 

 usually chelate, though chelae are lacking on the first pair in the 

 Pandalidce. The ova are carried attached to the hairs of the 

 pleopods. The branchiae are well developed on most, or on all the 

 legs. 



Family SYNALPHLEID^ V., new name. Snapping Shrimps. 



Alpheidea DeHaan, 1850. 



Alpheina Dana, op. cit, p. 534, 1852. Kingsley, List Caridea, p. 57, 1878. 



Alpheida: Randall, op. cit., vol. 8, p. 141, 1839. White, Trans. Zool. Soc. 

 London, XV, p. 118, 1847. Bate, Voy. Chall., xxiv, p. 528, 1888. Steb- 

 bing, Hist., p. 230. Ortmann, Syst. Decap., op. cit., p. 423, 1896. 

 M. J. Rathbun, op. cit, p. 104, 1901. Coutiere, Annal. des Sci. Nat., 

 Ser. 8, Zoology, vol. ix, pp. 1-559, pi- I-V, 1899 (classification, morphol- 

 ogy, anatomy, etc.). 



CrangonidcE M. J. Rathbun. Shore and Hay, 1918. Name preoccupied. 

 (non Dana, nee Bate.) 



The eye-stalks and eyes are usually entirely or partly covered 

 by thin lobes of the front edge of the carapace. Eyes are exposed 

 in Automate. Rostrum small, acute, often triangular, not serrate, 

 sometimes abortive. First pair of thoracic legs (chelipeds) much 

 larger than the second, strongly chelate, the chelae usually very 

 unequal in both sexes, sometimes subequal ; the carpus is usually 

 short, often cup-shaped or hemispherical. 



Second pair are slender with small, more simple chelae ; the 

 carpus is elongated and divided into several segments (usually 



