247 



hepatic region, two small tubercles of equal size are situated obliquely behind ons 

 another, between the base of the orbital spine and the posterior of the two teeth, into which 

 the anterior raoiety of the lateral crest is divided; the small granule posteriorly is, however, 

 wanting. The dorsal crest is formed by 4 or 5 tubercles, of which the posterior but one ie 

 much larger and longer than the others, that are subequal, small and obtuse. The two 

 posterior lobes of the posterior moiety of the dorso-lateral crest are hardly separated. The 

 median crest of the 2"<i tergum is a little more prominent, entire, not notched at all and the 

 pleuron of the 2"<i somite bears 5 instead of 3 tubercles between the anterior margin and the 

 swelhng. The median crests of the following terga are also more prominent and that of the 

 6"' is entire, not notched posteriorly. When these differences should prove to be constant and 

 to be not individual, this form should be regarded as a variety. 



Familv Crangonidae, 



The genus Naushotiia, described by Professor J. S. Kingslev in 1895 in the Bulletin 

 of the Essex Tnstitute, Vol. XXVII, p. 95, PI. Ill, figs. 8 — 10, contains but one species, Naush. 

 crangonoides Kingsley, which Professor Hermon C. Bumpus, of Brown University, had obtained 

 from the Island of Naushon, one of the Elizabeth Islands, on the southern coast of Massachusetts: 

 the only specimen was found July 13, 1893, '^ the sand of the small channels — the so-called 

 gutters — of that island. In my opinion this interesting form is closely related to the genus 

 Coralliocraugon Nobili (G. Nobili, Annal. Scienc. Nat. 9* Serie, Zool. T. IV, 1906, p. 82, 

 PI. 4, figs. 2 — It), of which the only representative was found at Djibouti. In both genera a 

 well-marked impressed straight line extends from the antero-external angle of the carapace on 

 either side to the posterior margin, by which the carapace is divided into a dorsal median and 

 two lateral branchiostegal parts. In his valuable paper on the Indian Crangonidae (Records 

 Indian Museum, Vol. XII, Part. VIII, 19 16, p. 384) this line is considered by Mr. Stanley 

 Kemp, for Coralliocrangon^ to represent the "linea thalassinica" of some Thalassinidea, the 

 persistence of which in this genus points to its being a survival of some very primitive form : 

 now apparently the same may be said with regard to the genus Naushonia. In both genera 

 the peraeopods of the 2"<^ pair are simple, non-chelate, the three posterior 'pairs are much 

 similar, and the subchela of the i*' pair bears such a great resemblance in both, that differences 

 are hardly perceptible. The two genera are nevertheless distinguished by their mandibles. In 

 Coralliocrangon the mandibles are simple, dentate, with a three-jointed palp, in Naushonia 

 they are "stout, incurved, the cutting edge excavate anteriorly, the edge itself serrate", their 

 palp is two-jointed and "the cutting edge of the mandible recalls somewhat that of the Atyidae, 

 but the palpus is not present in that family". In the figure 8 of Kingsley's paper, which 

 represents the mandible, the palp has been omitted ; the right part of the figure looks like the 

 dentate incisor, the left as the molar process. In Coralliocrangon the mandibular palp is 

 described as very hairy, "tres poilu", in Naushonia it "bears simple hairs on its inner, and 

 stiff bristles on its outer margin". In Kinglev's genus the peraeopods are provided with small 

 exopodites, that are not described by Nobili. The branchiae of Natisho7iia are unknown. 



