V2 G. O. SABS. PBELIMLNARY NOTICES ON THE SCHIZOPODA. 



with a row of curved, ciliated, spines, in the middle of the postericr 

 margin. 1 avo posterior pairs of legs quite rudimentary, only for- 

 ming very small inarticulate stems. without any trace of exopodites. 

 Three posterior pairs of branchiæ complex, sending off a branch 

 on the ventral face. luner lamella of the two anterior pairs of 

 pleopoda in the male. very niuch modified, and of rather complicate 

 structure. Phosphorescent globules (ocelli) present in the adult, on 

 all postabdominal segments, between the bases of the pleopoda, ex- 

 cept on the two last; 2 pairs of similar organs on the anterior 

 division of the body. at the base of the 2nd and 7th pair of legs. 

 beside another pair <>f imperfectly developed luminous globules in 

 the ocular pedicles. 



18. Euphausia pellucida Dana. 



Euphauxia pellucida, Dana, United Statts EspL. Exped. Vol. XIII. Crustaoea, 

 pg. 641, pl. 42, tlg. 4. a— m. 



Fuphamia Muller! , Dohrn, Zeitschrift f. wiss. Zool. Bd. XIII, Heft 3. 1 863, pg. 

 432, pl. XXVIII, fig. 29—31, pl. XXIX. 



Thysanopoda bidentata G. 0. Sars, Oversigt af Norges Cruataceer I. pg. 50, pl. 

 1, fig. 11—14. 



Body rather slender, and quite pellucid in living specimens. 

 Carapax with two lateral denticles on eacli side. above the inferior 

 margin; anterior part. distinctly keeled, dorsally; rostrum somewhat 

 produced, and sharply pointed. Epimera of the postabdominal seg- 

 ments distinctly developed, and somewhat angular. Last segment 

 rather elongated: the ventral spine at the base of the caudal fan 

 (præanal spine» tridentate. Eves of moderate size. pyriform. An- 

 tennular pedimcle provided above. at the end of the basal joint, 

 with an erect membranous leaflet. divided at the tip. in 2 or more 

 acuminate lappets. Antenna! scale scarcely surpassing the 2nd joint 

 of the antennular pedanele, oblong, obtusely truncated at the apex, 

 the denticle on the outer edge obsolete: the basal spine very long r 

 mucroniform, and densely serrate at the inner margin. Last joint 

 of 2nd pair of rnaxillae short. and broad, with a row of small teeth 

 anteriorly. Telson with two pairs of dorsal denticles. the subapical 



