ENTOMOSTRACA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 535 
Pleuromamma gracilis, var. esterlyx, nov. (Pl. XIII. figs. 8-10.) 
1905, Pleuromamma gracilis, Esterly, ““Copep. of the San Diego Region,” Univ. of California Publica- 
tions, vol. i. p. 175, text-fig. C. 
C. O. Esrerty, in the work referred to above, describes and partly figures a form of 
this species which differs from what Girsprecur appears to consider as the typical 
Pleuromamma gracilis—especially in the structure of the fifth pair of thoracic feet 
in the female. Dr Ginsprecur* shows the female fifth pair to consist each of a single 
ramus provided with three short and tolerably stout teeth, the inner one being slightly 
the larger ; and this agrees fairly well with the specimens of P. gracilis in the Scotia 
collections, and with Dr Ciavs’ original description, where, referring to the fifth pair, 
he says, “ Der letzte Fuss des Weibchens bildet einen schmalen, undeutlich gegliederten 
Stab und endit mit drei kurzen Zinken.”t In the form recorded by Esrerty from 
the San Diego region—a form which is also represented in the Scotca collections—the 
rami of the fifth pair of thoracic legs in the female are distinctly two-jointed and armed 
at the apex with three tolerably long and spiniform teeth, the middle one being the 
longest (see fig. 9, Pl. XIII.). As there does not appear to be otherwise any marked 
difference between this form and P. gracilis, and in the absence of a male, I am inclined 
to regard this form as no more than a fairly distinct variety of Plewromamma gracilis. 
Fam. LucicuTipé. 
Genus Lucicutia, Giesbrecht, 1898. 
Lucicutia flavicornis (Claus). 
1863, Leuckartia flavicornis, Claus, Die freilebenden Copepoden, p. 183, pl. xxxii. figs. 1-7. 
1892, “A % Giesb., 7. Fl. Neapel, vol. xix. p. 358, pls. v., xix., and xxxvill. 
1898, Lucicutia re Giesbrecht & Schmeil, Das Tierreich, vol. vi. p. 3. 
1904, ‘ i Cleve, Mar. Invest. S. Africa, vol. iii. p. 192. 
The only samples in which this species was observed were collected at Stations 11, 
36, and 49, in the North Atlantic, 23° 50’ N., 21° 34’ W., to 1° 53’ N., 27° 26’ W. 
Fam. HeTeRoRHABDID. 
Genus Heterorhabdus, Giesbrecht, 1898. 
Heterorhabdus papilliger (Claus). 
1863, Heterochxta papilligera, Claus, op. cit., p. 182, pl. xxxii. 
1892, papilliger, Giesb., op. cit., p. 372, pls. xx. and xxxix. 
1898, Heterorhabdus  ,, Giesbrecht & Schmeil, Das Tierreich, vol. vi. p. 114. 
1901, Heterochzta papilligera, Cleve, “Plankton from the Indian Ocean and the Malay Archipelago,” 
Kongl. Sv, Vet.-Akad. Handl., Band xxxv., No, 5, p. 7. 
This species, which appeared to be moderately rare, was only obtained in a single 
gathering collected at Station 15, 20° 34’ N., 23° 12’ W. 
* Cf. Fauna wu. Flora des Golfes von Neapel. + Die freilebenden Copepoden, p. 197 (1863). 
