Decapod Crustacea of Bermuda, Part II. 93 



Bermudas, and if so they can easily be interpolated here. Com- 

 parative measurements have here been intentionally omitted for 

 greater simplicity. 



The appendages illustrated on the accompanying plates have 

 been drawn with a camera-lucida ; in such drawings there is pretty 

 sure to be some distortion in the case of elongated objects, such as 

 the legs, though corrected as well as possible. Moreover, the more 

 convex parts are necessarily mounted under some pressure, so that 

 hollow organs are flattened and may appear somewhat wider than 

 they should. Thus minute measurements of the drawings will not 

 always be found to agree with those made from fresh, unmounted 

 objects. This applies to similar illustrations of other writers as 

 well as to these. Thus minute measurements of proportions are 

 often not easy to apply, nor to verify ; especially such as breadth 

 to length of the articles of legs, antennae, etc. Ratios of length to 

 length are more likely to be unaltered by pressure, but the hollow 

 appendages often shrink in length in the process of mounting, 

 especially the chitinous exterior, so that the muscles, etc. within 

 become folded or distorted. 



This genus, founded by Bate (op. cit, 1888, p. 574, pi. 103). had 

 as its type and only species, 6\ falcatus Bate, which Coutiere 

 identified with 5*. comatularum of Haswell. It belongs to a special 

 division of the genus, as now understood, viz. the Comatularum 

 group of Coutiere, of which no species are known in American 

 waters. Some of the species live as commensals or parasites on 

 crinoids. 



Bate's type was a stout female with a long acute rostrum, twice 

 as long as the sharp and elongated ocular spines. The rostrum 

 reaches more than to the end of the second antennular article. 

 The antennular stalk is shorter than the antennal stalk, which is 

 elongated ; its scale is well developed ; basicerite has two subequal 

 acute spines ; stylocerite elongated. Mandibles have the cutting 

 lobe reduced to a curved spine ; second article of the palpus 

 enlarged, ovate. Third maxilliped slender, the tip with few spines. 

 Large chela with a strongly arched acute dactyl; smaller chela 

 long with an incurved or crooked simple dactyl. Legs of second 

 pair are described and figured as /-jointed ; articles 3-7 subequal ; 

 first elongated. Legs 3 5 slender, terete; secondary hook of 

 dactyl obsolete; telson ovate, wide at tip, with an obtuse median 

 lobe. 



