324 MR. G. MCJEEAY AXD MISS F. G. WHITTmG ON 



It ranges from lat. 16' 54' S., long. 2° 54' E., to 47^ N. by 13° W., and to long. 72° W. 

 in 16° and 17° N. lat. 



GoxYAULAx JoLLiFFEi, sp. n. Bodv divided into two nearly equal limbs, widest at the 

 girdle, ends of girdle oblique ; tlie membrane, including girdle, composed of angular 

 plates covered with fine punctate markings ; the proximal limb tapering abruptly, 

 acuminate, apex consisting of a single conical plate ; the distal limb very deeply 

 trifid. (Plate XXVIII. figs. 1 a, b.) 

 Its nearest ally is evidently G. poly gramma, as figured by Stein, though its plates 



approximate to those of G. hirostris (' Infusionsthiere,' Abth. iii. plate iv. figs. 16 & 20). 



Its range is from the Azores to Panama. 



€r. HiGHLEii, sp. n. Body divided into tw o approximately equal limbs, widest at the 

 girdle ; memlirane composed of angular plates, finely punctate ; girdle punctate, and 

 ends of same oblique ; proximal limb rounded below, tapering above, drawn out 

 into a long unmarked spine which is enveloped in a sheath ; foraminal area irregu- 

 larly oval ; distal end armed with two long sheathed spines, Avhich are finely marked 

 for two thirds of their length. (PI. XXVIII. figs. 2 «, b.) 

 Its range is the same as G. Jolliffei, though it has not been traced quite so far 



north. 



G. GLYPTOEHYXCHUS, sp. n. Body divided into tw^o nearly equal limbs, widest at the 

 girdle ; membrane composed of angular plates, faintly punctate ; girdle unmarked 

 and with prominent margins, ends oblique; proximal limb conical, but slightly 

 rounded, terminating in a spine marked with tw^o lateral bands of oblique striae ; 

 foraminal area irregularly oval ; distal limb armed with tw^o, sometimes three blunt 

 spines, marked externally with exactly transverse striae. (PI. XXVIII. figs. 3 a, h, c.) 

 In the sea between Barbadoes and the Azores (between lat. 18" X., long. 52° W., and 



lat. 24° X., loDg. 51° W. 



GoNiODOMA, Stein. 

 It will be seen from an iDspection of the Tables that G. acuminatum, Stein, the only 

 species known hitherto, occurs wdth great regularity in all the waters traversed. For 

 example, in the Table of ' Para,' Voyage III., we miss it only in three gatherings. In 

 the voyages of the ' Medway ' and ' Atrato,' late in the season, it drops out from certain 

 gatherings, and it might appear that we have here an indication of some seasonal change. 

 That this is improbable appears from the fact that we miss it only in tropical waters 

 w^here there is comparatively little fluctuation of temperature; and in the *Para' 

 A^oyage I. (February-March) it drops out from the record only twice. Moreover, it 

 shares this absence from the * Medway ' gatherings with a number of other common 

 forms such as Feridinittm divergens, thus pointing to some casual imperfection in the 

 mode of collecting. We have added the following three new species : — 



